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LT6202/LT6203/LT6204 Single/Dual/Quad 100MHz, Rail-to-Rail Input and Output, Ultralow 1.9nV/Hz Noise, Low Power Op Amps
FEATURES
s s s s s s s s s s s s s s
DESCRIPTIO
Low Noise Voltage: 1.9nV/Hz (100kHz) Low Supply Current: 3mA/Amp Max Gain Bandwidth Product: 100MHz Dual LT6203 in Tiny DFN Package Low Distortion: -80dB at 1MHz Low Offset Voltage: 500V Max Wide Supply Range: 2.5V to 12.6V Input Common Mode Range Includes Both Rails Output Swings Rail-to-Rail Common Mode Rejection Ratio 90dB Typ Unity Gain Stable Low Noise Current: 1.1pA/Hz Output Current: 30mA Min Operating Temperature Range -40C to 85C
The LT(R)6202/LT6203/LT6204 are single/dual/quad low noise, rail-to-rail input and output unity gain stable op amps that feature 1.9nV/Hz noise voltage and draw only 2.5mA of supply current per amplifier. These amplifiers combine very low noise and supply current with a 100MHz gain bandwidth product, a 25V/s slew rate, and are optimized for low supply signal conditioning systems. These amplifiers maintain their performance for supplies from 2.5V to 12.6V and are specified at 3V, 5V and 5V supplies. Harmonic distortion is less than - 80dBc at 1MHz making these amplifiers suitable in low power data acquisition systems. The LT6202 is available in the 5-pin SOT-23 and the 8-pin SO, while the LT6203 comes in 8-pin SO and MSOP packages with standard op amp pinouts. For compact layouts the LT6203 is also available in a tiny fine line leadless package (DFN), while the quad LT6204 is available in the 16-pin SSOP and 14-pin SO packages. These devices can be used as plug-in replacements for many op amps to improve input/output range and noise performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s s s s s s
Low Noise, Low Power Signal Processing Active Filters Rail-to-Rail Buffer Amplifiers Driving A/D Converters DSL Receivers Battery Powered/Battery Backed Equipment
TYPICAL APPLICATIO
-
2k
Low Noise 4- to 2-Wire Local Echo Cancellation Differential Receiver Line Receiver Integrated Noise 25kHz to 150kHz
5.0
1/2 LT1739 50 1k 1k
INTEGRATED NOISE (VRMS)
4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5
-
1/2 LT6203
1:1
+
*
VR LINE RECEIVER
VD LINE DRIVER
VL 100 LINE
*
+
1/2 LT6203
+
1/2 LT1739
-
50 2k
6203 TA01a
1k
1k
0 0 20 40 60 80 100 120 140 160 BANDWIDTH (kHz)
6203 * TA01b
-
U
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U
U
+
1
LT6202/LT6203/LT6204
ABSOLUTE
AXI U RATI GS
Total Supply Voltage (V+ to V-) ............................ 12.6V Input Current (Note 2) ........................................ 40mA Output Short-Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 4) ...-40C to 85C Specified Temperature Range (Note 5) ....-40C to 85C Junction Temperature ........................................... 150C
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT 1 V- 2
- +
5 V+
+IN 3
4 -IN
+IN 3 V- 4
S5 PACKAGE 5-LEAD PLASTIC TSOT-23
TJMAX = 150C, JA = 250C/W
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150C, JA = 190C/W
ORDER PART NUMBER LT6202CS5 LT6202IS5
TOP VIEW
S5 PART MARKING* LTG6
ORDER PART NUMBER LT6202CS8 LT6202IS8
OUT A 1 -IN A 2 +IN A 3 V- 4 A B
8 7 6 5
V
+
TOP VIEW OUT A -IN A +IN A V- 1 2 3 4
- - +
OUT A 1 8 7 6 5 V+ OUT B -IN B +IN B -IN A 2 +IN A 3 V
-
- + + -
OUT B -IN B +IN B
DD PACKAGE 8-LEAD (3mm x 3mm) PLASTIC DFN TJMAX = 125C, JA = 160C/W UNDERSIDE METAL CONNECTED TO V-
MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150C, JA = 250C/W
ORDER PART NUMBER LT6203CDD LT6203IDD
DD PART MARKING* LAAP
ORDER PART NUMBER LT6203CMS8 LT6203IMS8
MS8 PART MARKING LTB2 LTB3
ORDER PART NUMBER LT6203CS8 LT6203IS8
*The temperature grades are identified by a label on the shipping container.
2
-
+
+
U
U
W
WW
U
W
(Note 1)
Junction Temperature (DD Package) .................... 125C Storage Temperature Range ..................-65C to 150C Storage Temperature Range (DD Package) ........................................-65C to 125C Lead Temperature (Soldering, 10 sec).................. 300C
TOP VIEW NC 1 -IN 2 8 7 6 5 NC V+ OUT NC
S8 PART MARKING 6202 6202I
TOP VIEW
+ 8V
7 OUT B 6 -IN B 5 +IN B
4
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150C, JA = 190C/W
S8 PART MARKING 6203 6203I
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LT6202/LT6203/LT6204
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT A 1
- +
16 A D
-
OUT D
ORDER PART NUMBER
OUT A 1
- +
-IN A 2 +IN A 3 V
+
15 -IN D 14 +IN D 13 V
-
4 B C-
+ - +
+IN A V
+
3 4
+IN B 5 -IN B 6 OUT B 7 NC 8
12 +IN C 11 -IN C 10 OUT C 9 NC
-IN B OUT B
6 7
GN PACKAGE 16-LEAD NARROW PLASTIC SSOP TJMAX = 150C, JA = 135C/W
6204 6204I
S PACKAGE 14-LEAD PLASTIC SO TJMAX = 150C, JA = 150C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage
TA = 25C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply,
CONDITIONS VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 5V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23 MIN TYP 0.1 0.1 0.6 0.6 0.25 0.25 1.0 1.0 0.15 0.3 -7.0 -8.8 -1.3 1.3 -3.3 4.7 0.1 VCM = Half Supply VCM = V+ VCM = V - 0.1Hz to 10Hz f = 100kHz, VS = 5V f = 10kHz, VS = 5V f = 10kHz, VS = 5V Common Mode Differential Mode 0.12 0.07 0.12 800 2 2.9 0.75 1.1 4 12 4.5 MAX 0.5 0.7 1.5 1.7 2.0 2.2 3.5 3.7 0.8 1.8 2.5 11.3 0.6 1 1 1.1 UNITS mV mV mV mV mV mV mV mV mV mV A A A A A A A A nVP-P nV/Hz nV/Hz pA/Hz pA/Hz M k
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Input Offset Voltage Match (Channel-to-Channel) (Note 6) IB Input Bias Current
VCM = Half Supply VCM = V- to V+ VCM = Half Supply VCM = V+ VCM = V - VCM = V - to V+
IB IOS
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
Input Noise Voltage en in Input Noise Voltage Density Input Noise Current Density, Balanced Input Noise Current Density, Unbalanced Input Resistance
-
GN PART MARKING
+
+IN B
5
B
C-
+
A
D
-
LT6204CGN LT6204IGN
U
TOP VIEW 14 OUT D 13 -IN D 12 +IN D 11 V
+
W
U
ORDER PART NUMBER LT6204CS LT6204IS
-IN A
2
+
-
10 +IN C 9 -IN C 8 OUT C
3
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
SYMBOL CIN AVOL PARAMETER Input Capacitance Large Signal Gain
TA = 25C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply,
CONDITIONS Common Mode Differential Mode VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 VS = 5V, VO = 1V to 4V, RL = 100 to VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 VS = 5V, VCM = V - to V+ VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V - to V+ VS = 5V, VCM = 1.5V to 3.5V VS = 2.5V to 10V, VCM = 0V VS = 2.5V to 10V, VCM = 0V No Load ISINK = 5mA VS = 5V, ISINK = 20mA VS = 3V, ISINK = 15mA No Load ISOURCE = 5mA VS = 5V, ISOURCE = 20mA VS = 3V, ISOURCE = 15mA VS = 5V VS = 3V VS = 5V VS = 3V Frequency = 1MHz, VS = 5V VS = 5V, AV = -1, RL = 1k, VO = 4V VS = 5V, VOUT = 3VP-P 0.1%, VS = 5V, VSTEP = 2V, AV = -1, RL = 1k 17 1.8 30 25 40 8.0 17 60 80 56 85 60 70 2.5 5 85 240 185 25 90 325 225 45 40 2.5 2.3 90 24 2.5 85 3.0 2.85 50 190 460 350 75 210 600 410 MIN TYP 1.8 1.5 70 14 40 83 100 80 120 74 100 MAX UNITS pF pF V/mV V/mV V/mV dB dB dB dB dB dB V mV mV mV mV mV mV mV mV mA mA mA mA MHz V/s MHz ns
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6) PSRR Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 6) Minimum Supply Voltage (Note 7) VOL Output Voltage Swing LOW Saturation (Note 8)
VOH
Output Voltage Swing HIGH Saturation (Note 8)
ISC IS GBW SR FPBW tS
Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10) Settling Time
The q denotes the specifications which apply over 0C < TA < 70C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 5V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23 VOS TC Input Offset Voltage Drift (Note 9) Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = Half Supply VCM = Half Supply VCM = V - to V +
q q q q q q q q q q q
MIN
TYP 0.2 0.2 0.6 0.6 0.7 0.7 1.2 1.2 3.0 0.15 0.5
MAX 0.7 0.9 1.7 1.9 2.5 2.7 4.0 4.2 9.0 0.9 2.3
UNITS mV mV mV mV mV mV mV mV V/C mV mV
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4
LT6202/LT6203/LT6204
The q denotes the specifications which apply over 0C < TA < 70C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL IB PARAMETER Input Bias Current CONDITIONS VCM = Half Supply VCM = V + VCM = V - VCM = V - to V + VCM = Half Supply VCM = V + VCM = V - VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS /2 VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS /2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS /2 VS = 5V, VCM = V - to V + VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V - to V +
q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN -7.0 -8.8
TYP -1.3 1.3 -3.3 4.7 0.1 0.15 0.10 0.15
MAX 2.5 11.3 0.6 1 1 1.1
UNITS A A A A A A A A V/mV V/mV V/mV dB dB dB dB dB dB V
IB IOS
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
AVOL
Large Signal Gain
35 6.0 15 60 78 56 83 60 70 3.0
60 12 36 83 97 75 100 70 100 5.0 95 260 50 115 360 260 60 200 365 100 230 635 430
CMRR
Common Mode Rejection Ratio
PSRR
CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V Power Supply Rejection Ratio VS = 3V to 10V, VCM = 0V PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, VCM = 0V Minimum Supply Voltage (Note 7)
VOL
Output Voltage Swing LOW Saturation (Note 8) Output Voltage Swing HIGH Saturation (Note 8)
No Load ISINK = 5mA ISINK = 15mA No Load ISOURCE = 5mA VS = 5V, ISOURCE = 20mA VS = 3V, ISOURCE = 15mA VS = 5V VS = 3V VS = 5V VS = 3V Frequency = 1MHz VS = 5V, AV = -1, RL = 1k, VO = 4V VS = 5V, VOUT = 3VP-P
mV mV mV mV mV mV mV mA mA
VOH
ISC IS GBW SR FPBW
Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10)
20 20
33 30 3.1 2.75 87 3.85 3.50
mA mA MHz V/s MHz
15 1.6
21 2.2
The q denotes the specifications which apply over -40C < TA < 85C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 5V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23 VS = 3V, 0V, VCM = V + to V - LT6203, LT6204, LT6202S8 LT6202 SOT-23
q q q q q q q q
MIN
TYP 0.2 0.2 0.6 0.6 1.0 1.0 1.4 1.4
MAX 0.8 1.0 2.0 2.2 3.0 3.5 4.5 4.7
UNITS mV mV mV mV mV mV mV mV
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5
LT6202/LT6203/LT6204
The q denotes the specifications which apply over -40C < TA < 85C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 5)
SYMBOL VOS TC PARAMETER Input Offset Voltage Drift (Note 9) Input Offset Voltage Match (Channel-to-Channel) (Note 6) IB Input Bias Current CONDITIONS VCM = Half Supply VCM = Half Supply VCM = V - to V+ VCM = Half Supply VCM = V+ VCM = V - VCM = V - to V+
q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN
TYP 3.0 0.3 0.7
MAX 9.0 1.0 2.5 2.5 11.3 0.6 1 1.1 1.2
UNITS V/C mV mV A A A A A A A A V/mV V/mV V/mV dB dB dB dB dB dB V
-7.0 -8.8
-1.3 1.3 -3.3 4.7 0.1 0.2 0.2 0.2
IB IOS
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
VCM = Half Supply VCM = V+ VCM = V - VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS /2 VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS /2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS /2 VS = 5V, VCM = V - to V+ VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V - to V+ VS = 3V to 10V, VCM = 0V
q q q q q q q q q q q q q
AVOL
Large Signal Gain
32 4.0 13 60 75 56 80 60 70 3.0
60 10 32 80 95 75 100 70 100 6 95 210 55 125 370 270 70 210 400 110 240 650 650
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V PSRR Power Supply Rejection Ratio Minimum Supply Voltage (Note 7) VOL Output Voltage Swing LOW Saturation (Note 8) Output Voltage Swing HIGH Saturation (Note 8) No Load ISINK = 5mA ISINK = 15mA No Load ISOURCE = 5mA VS = 5V, ISOURCE = 15mA VS = 3V, ISOURCE = 15mA VS = 5V VS = 3V VS = 5V VS = 3V Frequency = 1MHz VS = 5V, AV = -1, RL = 1k, VO = 4V VS = 5V, VOUT = 3VP-P PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, VCM = 0V
q q q q q q q q q q q q q q
mV mV mV mV mV mV mV mA mA
VOH
ISC IS GBW SR FPBW
Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10)
15 15
25 23 3.3 3.0 83 4.1 3.65
mA mA MHz V/s MHz
12 1.3
17 1.8
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6
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
TA = 25C, VS = 5V; VCM = VOUT = 0V, unless otherwise noted.
CONDITIONS LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V - LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V - MIN TYP 1.0 2.6 2.3 1.0 2.6 2.3 0.2 0.4 -7.0 -9.5 -1.3 1.3 -3.8 5.3 0.1 VCM = Half Supply VCM = V+ VCM = V - 0.1Hz to 10Hz f = 100kHz f = 10kHz f = 10kHz Common Mode Differential Mode Common Mode Differential Mode VO = 4.5V, RL = 1k VO = 2.5V, RL = 100 VCM = V - to V+ VCM = -2V to 2V VCM = -2V to 2V VS = 1.25V to 5V VS = 1.25V to 5V No Load ISINK = 5mA ISINK = 20mA No Load ISOURCE = 5mA ISOURCE = 20mA 30 Frequency = 1MHz AV = -1, RL = 1k, VO = 4V VOUT = 3VP-P 0.1%, VSTEP = 2V, AV = -1, RL = 1k AV = 2, RF = RG = 499, RL = 2k AV = 2, RF = RG = 499, RL = 2k 70 18 1.9 75 11 65 85 85 60 70 0.15 0.2 0.35 800 1.9 2.8 0.75 1.1 4 12 1.8 1.5 130 19 85 98 120 74 100 5 87 245 40 95 320 40 2.8 100 25 2.6 78 0.05 0.03 3.5 50 190 460 95 210 600 4.5 MAX 2.5 5.5 5.0 2.7 6.0 5.5 1.0 2.0 3.0 12.5 0.6 1 1.2 1.3 UNITS mV mV mV mV mV mV mV mV A A A A A A A A nVP-P nV/Hz nV/Hz pA/Hz pA/Hz M k pF pF V/mV V/mV dB dB dB dB dB mV mV mV mV mV mV mA mA MHz V/s MHz ns % DEG
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Input Offset Voltage Match (Channel-to-Channel) (Note 6) IB Input Bias Current
VCM = 0V VCM = V - to V+ VCM = Half Supply VCM = V+ VCM = V - VCM = V - to V+
IB IOS
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
Input Noise Voltage en in Input Noise Voltage Density Input Noise Current Density, Balanced Input Noise Current Density, Unbalanced Input Resistance CIN AVOL CMRR Input Capacitance Large Signal Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 6) PSRR Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 6) VOL Output Voltage Swing LOW Saturation (Note 8) Output Voltage Swing HIGH Saturation (Note 8) Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10) Settling Time Differential Gain (Note 11) Differential Phase (Note 11)
VOH
ISC IS GBW SR FPBW tS dG dP
7
LT6202/LT6203/LT6204
The q denotes the specifications which apply over 0C < TA < 70C temperature range. VS = 5V; VCM = VOUT = 0V, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V - LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V - VOS TC Input Offset Voltage Drift (Note 9) Input Offset Voltage Match (Channel-to-Channel) (Note 6) IB IB IOS Input Bias Current VCM = Half Supply VCM = 0V VCM = V - to V+ VCM = Half Supply VCM = V+ VCM = V - VCM = V - to V+
q q q q q q q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN
TYP 1.6 3.2 2.8 1.6 3.2 2.8 7.5 0.2 0.5
MAX 2.8 6.8 5.8 3.0 7.3 6.3 24 1.0 2.2 3.6 13 0.7 1 1.2 1.4
UNITS mV mV mV mV mV mV V/C mV mV A A A A A A A A V/mV V/mV dB dB dB dB dB
-7.0 -10
-1.4 1.8 -4.3 5.4 0.15 0.1 0.2 0.4
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
VCM = Half Supply VCM = V+ VCM = V - VO = 4.5V, RL = 1k VO = 2V, RL = 100 VCM = V - to V+ VCM = -2V to 2V VCM = -2V to 2V VS = 1.5V to 5V VS = 1.5V to 5V No Load ISINK = 5mA ISINK = 15mA No Load ISOURCE = 5mA ISOURCE = 20mA
q q q q q q q q q q q q q q q q q q
AVOL CMRR
Large Signal Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 6)
70 10 65 83 83 60 70
120 18 84 95 110 70 100 6 95 210 65 125 350 70 200 400 120 240 625 4.3
PSRR VOL
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 6) Output Voltage Swing LOW Saturation (Note 8) Output Voltage Swing HIGH Saturation (Note 8) Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10)
mV mV mV mV mV mV mA mA MHz V/s MHz
VOH
ISC IS GBW SR FPBW
25
34 3.5 95
Frequency = 1MHz AV = -1, RL = 1k, VO = 4V VOUT = 3VP-P
q q q
16 1.7
22 2.3
The q denotes the specifications which apply over -40C < TA < 85C temperature range. VS = 5V; VCM = VOUT = 0V, unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V - LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V -
q q q q q q
MIN
TYP 1.7 3.8 3.5 1.7 3.8 3.5
MAX 3.0 7.5 6.6 3.2 7.7 6.7
UNITS mV mV mV mV mV mV
620234fa
8
LT6202/LT6203/LT6204
The q denotes the specifications which apply over -40C < TA < 85C temperature range. VS = 5V; VCM = VOUT = 0V, unless otherwise noted. (Note 5)
SYMBOL VOS TC PARAMETER Input Offset Voltage Drift (Note 9) Input Offset Voltage Match (Channel-to-Channel) (Note 6) IB IB IOS Input Bias Current CONDITIONS VCM = Half Supply VCM = 0V VCM = V - to V+ VCM = Half Supply VCM = V+ VCM = V - VCM = V - to V+
q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN
TYP 7.5 0.3 0.6
MAX 24 1.0 2.5 3.6 13 0.7 1 1.2 1.6
UNITS V/C mV mV A A A A A A A A V/mV V/mV dB dB dB dB dB
-7.0 -10
-1.4 1.8 -4.5 5.4 0.15 0.15 0.3 0.5
IB Shift IB Match (Channel-to-Channel) (Note 6) Input Offset Current
VCM = Half Supply VCM = V+ VCM = V - VO = 4.5V, RL = 1k VO = 1.5V RL = 100 VCM = V - to V+ VCM = -2V to 2V VCM = -2V to 2V VS = 1.5V to 5V VS = 1.5V to 5V No Load ISINK = 5mA ISINK = 15mA No Load ISOURCE = 5mA ISOURCE = 15mA
q q q q q q q q q q q q q q q q q q
AVOL CMRR
Large Signal Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 6)
60 6.0 65 80 80 60 70
110 13 84 95 110 70 100 7 98 260 70 130 360 75 205 500 130 250 640 4.5
PSRR VOL
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 6) Output Voltage Swing LOW Saturation (Note 8) Output Voltage Swing HIGH Saturation (Note 8) Short-Circuit Current Supply Current per Amp Gain Bandwidth Product Slew Rate Full Power Bandwidth (Note 10)
mV mV mV mV mV mV mA mA MHz V/s MHz
VOH
ISC IS GBW SR FPBW
15
25 3.8 90
Frequency = 1MHz AV = -1, RL = 1k, VO = 4V VOUT = 3VP-P
q q q
13 1.4
18 1.9
Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: Inputs are protected by back-to-back diodes and diodes to each supply. If the inputs are taken beyond the supplies or the differential input voltage exceeds 0.7V, the input current must be limited to less than 40mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 4: The LT6202C/LT6202I, LT6203C/LT6203I and LT6204C/LT6204I are guaranteed functional over the temperature range of -40C and 85C. Note 5: The LT6202C/LT6203C/LT6204C are guaranteed to meet specified performance from 0C to 70C. The LT6202C/LT6203C/LT6204C are designed, characterized and expected to meet specified performance from -40C to 85C, but are not tested or QA sampled at these temperatures. The LT6202I/LT6203I/LT6204I are guaranteed to meet specified performance from -40C to 85C.
Note 6: Matching parameters are the difference between the two amplifiers A and D and between B and C of the LT6204; between the two amplifiers of the LT6203. CMRR and PSRR match are defined as follows: CMRR and PSRR are measured in V/V on the identical amplifiers. The difference is calculated between the matching sides in V/V. The result is converted to dB. Note 7: Minimum supply voltage is guaranteed by power supply rejection ratio test. Note 8: Output voltage swings are measured between the output and power supply rails. Note 9: This parameter is not 100% tested. Note 10: Full-power bandwidth is calculated from the slew rate: FPBW = SR/2VP Note 11: Differential gain and phase are measured using a Tektronix TSG120YC/NTSC signal generator and a Tektronix 1780R Video Measurement Set. The resolution of this equipment is 0.1% and 0.1. Ten identical amplifier stages were cascaded giving an effective resolution of 0.01% and 0.01.
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LT6202/LT6203/LT6204 TYPICAL PERFOR A CE CHARACTERISTICS
VOS Distribution, VCM = V+/2
45 40 35
NUMBER OF UNITS
VS = 5V, 0V S8
30 25 20 15 10 5 0 -250 -150 -50 0 50 150 INPUT OFFSET VOLTAGE (V) 250
NUMBER OF UNITS
40 30 20 10 0 -800-600 -400 -200 0 200 400 600 800 1000 INPUT OFFSET VOLTAGE (V)
LT6202/03/04 G02
NUMBER OF UNITS
LT6202/03/04 G01
Supply Current vs Supply Voltage (Both Amplifiers)
12 10
SUPPLY CURRENT (mA)
TA = 125C
OFFSET VOLTAGE (mV)
INPUT BIAS CURRENT (A)
8 6 4 2 0 0 2 TA = 25C
TA = -55C
8 12 6 10 4 TOTAL SUPPLY VOLTAGE (V)
Input Bias Current vs Temperature
4 3
INPUT BIAS CURRENT (A)
VS = 5V, 0V
OUTPUT SATURATION VOLTAGE (V)
2 1 0 -1 -2 -3 -4 -5
VCM = 5V
1 TA = 125C 0.1 TA = 25C
OUTPUT SATURATION VOLTAGE (V)
VCM = 0V
-6 -50 -35 -20 -5 10 25 40 55 TEMPERATURE (C)
LT6202/03/04 G07
10
UW
14
LT6202/03/04 G04
VOS Distribution, VCM = V+
60 50 VS = 5V, 0V S8
VOS Distribution, VCM = V-
60 50 40 30 20 10 0 -800 -600 -400 -200 0 200 400 600 800 INPUT OFFSET VOLTAGE (V)
LT6202/03/04 G03
VS = 5V, 0V S8
Offset Voltage vs Input Common Mode Voltage
2.0 1.5
0 2
Input Bias Current vs Common Mode Voltage
VS = 5V, 0V
1.0 TA = 125C 0.5 TA = 25C 0 -0.5 -1.0 -1 3 5 2 4 0 1 INPUT COMMON MODE VOLTAGE (V) 6 TA = -55C
-2
TA = -55C
-4 TA = 25C TA = 125C -6 -1 0 4 5 1 2 3 COMMON MODE VOLTAGE (V) 6
VS = 5V, 0V TYPICAL PART
LT6202/03/04 G05
LT6202/03/04 G06
Output Saturation Voltage vs Load Current (Output Low)
10 VS = 5V, 0V 10
Output Saturation Voltage vs Load Current (Output High)
VS = 5V, 0V
1 TA = 25C 0.1
TA = 125C
0.01 TA = -55C 1 10 0.1 LOAD CURRENT (mA) 100
0.01
TA = -55C
70
85
0.001 0.01
0.001 0.01
1 10 0.1 LOAD CURRENT (mA)
100
LT6202/03/04 G08
LT6202/03/04 G09
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LT6202/LT6203/LT6204 TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Supply Voltage
10
CHANGE IN OFFSET VOLTAGE (mV)
8 6 4 2 0 -2 -4 -6 -8 -10 1 1.5 2 2.5 3 3.5 4 4.5 TOTAL SUPPLY VOLTAGE (V) 5 TA = -55C TA = 25C TA = 125C
OUTPUT SHORT-CIRCUIT CURRENT (mA)
INPUT VOLTAGE (mV)
Open-Loop Gain
2.5 2.0 1.5 INPUT VOLTAGE (mV) 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 0 1 2 3 OUTPUT VOLTAGE (V) 4 5 RL = 100 RL = 1k VS = 5V, 0V TA = 25C
1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -5 -4 -3 -2 -1 0 1 2 3 OUTPUT VOLTAGE (V) 4 5 RL = 1k
OFFSET VOLTAGE (mV)
INPUT VOLTAGE (mV)
Warm-Up Drift vs Time (LT6203S8)
160 TA = 25C
100
CHANGE IN OFFSET VOLTAGE (V)
TOTAL NOISE VOLTAGE (nV/Hz)
140 120 100 80 60 40 20 0 0 20
VS = 5V
NOISE VOLTAGE (nVHz)
VS = 2.5V
VS = 1.5V 40 60 80 100 120 140 160 TIME AFTER POWER-UP (s)
LT6202/03/04 G16
UW
LT6202/03/04 G10
LT6202/03/04 G13
Output Short-Circuit Current vs Power Supply Voltage
80 SOURCING 60 40 TA = 25C 20 TA = -55C 0 SINKING -20 -40 -60 -80 1.5 2 2.5 TA = 125C 4 4.5 3.5 3 POWER SUPPLY VOLTAGE (V) 5 TA = -55C TA = 25C TA = 125C
Open-Loop Gain
2.5 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 0 0.5 1.5 2.0 1.0 OUTPUT VOLTAGE (V) 2.5 3.0 RL = 100 RL = 1k VS = 3V, 0V TA = 25C
LT6202/03/04 G11
LT6202/03/04 G12
Open-Loop Gain
2.5 2.0 1.5 VS = 5V TA = 25C
15 10 5 0 -5
Offset Voltage vs Output Current
VS = 5V TA = 125C
RL = 100
TA = 25C TA = -55C
-10 -15 20 40 -80 -60 -40 -20 0 OUTPUT CURRENT (mA)
60
80
LT6202/03/04 G14
LT6202/03/04 G15
Total Noise vs Total Source Resistance
VS = 2.5V VCM = 0V f = 100kHz
Input NoiseVoltage vs Frequency
45 40 35 30 25 20 15 10 5 0
100k
TOTAL SPOT NOISE
NPN ACTIVE VCM = 4.5V PNP ACTIVE VCM = 0.5V
VS = 5V, 0V TA = 25C
10
1 RESISTOR SPOT NOISE 0.1 10
AMPLIFIER SPOT NOISE VOLTAGE
BOTH ACTIVE VCM = 2.5V 10 100 1k 10k FREQUENCY (Hz) 100k
100 1k 10k TOTAL SOURCE RESISTANCE ()
LT6202/03/04 G17
LT6202/03/04 G18
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LT6202/LT6203/LT6204 TYPICAL PERFOR A CE CHARACTERISTICS
Balanced Noise Current vs Frequency
7
UNBALANCED NOISE CURRENT (pA/Hz)
BALANCED NOISE CURRENT (pA/Hz)
6 5 4 3 2 1 0 10 100 PNP ACTIVE VCM = 0.5V
8 6 4 2 0
PNP ACTIVE VCM = 0.5V
OUTPUT VOLTAGE (nV)
BALANCED SOURCE RESISTANCE VS = 5V, 0V TA = 25C
BOTH ACTIVE VCM = 2.5V
NPN ACTIVE VCM = 4.5V
1k 10k FREQUENCY (Hz)
LT6202/03/04 G19
Gain Bandwidth and Phase Margin vs Temperature
PHASE MARGIN (DEG)
90 VS = 5V PHASE MARGIN VS = 3V, 0V 80 70 60
GAIN (dB)
GAIN BANDWITH (MHz)
120 100 80 60 40 -55 -25
30 20 10 0 CL = 5pF RL = 1k VCM = 0V 1M 10M 100M FREQUENCY (Hz) 1G GAIN VS = 3V, 0V VS = 5V
GAIN (dB)
VS = 5V VS = 3V, 0V GAIN BANDWIDTH
0 25 75 50 TEMPERATURE (C)
LT6202/03/04 G21
Gain Bandwidth and Phase Margin vs Supply Voltage
90 TA = 25C RL = 1k CL = 5pF 80 PHASE MARGIN 70 60 120 100 80 60 40 0 2 10 12 8 6 TOTAL SUPPLY VOLTAGE (V) 4 14 GAIN BANDWIDTH 50 70 60
GAIN BANDWITH (MHz)
SLEW RATE (V/s)
50 40 30 20 VS = 5V
VS = 2.5V
OUTPUT IMPEDANCE ()
LT6202/03/04 G24
12
UW
100k 100 125
Unbalanced Noise Current vs Frequency
12 10 UNBALANCED SOURCE RESISTANCE VS = 5V, 0V TA = 25C
0.1Hz to 10Hz Output Voltage Noise
1200 1000 800 400 0 -400 -800 VS = 5V, 0V VCM = VS/2
BOTH ACTIVE VCM = 2.5V NPN ACTIVE VCM = 4.5V
-1000 - 1200
10 100 1k 10k FREQUENCY (Hz) 100k
TIME (2s/DIV)
LT6202/03/04 G20
LT6202/03/04 G19.1
Open-Loop Gain vs Frequency
80 70 60 50 40 VS = 3V, 0V PHASE VS = 5V 120 100 80 60
PHASE (DEG)
Open-Loop Gain vs Frequency
80 70 60 50 40 30 20 10 0 VCM = 4.5V GAIN VCM = 0.5V VCM = 4.5V PHASE VCM = 0.5V 120 100 80 60
PHASE (DEG)
40 20 0 -20 -40 -60 -80
40 20 0 -20 -40 -60 10M 100M FREQUENCY (Hz) -80 1G
-10
-20 100k
VS = 5V, 0V -10 CL = 5pF RL = 1k -20 1M 100k
LT6202/03/04 G22
LT6202/03/04 G23
Slew Rate vs Temperature
1000
AV = -1 RF = RG = 1k RL = 1k RISING
Output Impedance vs Frequency
VS = 5V, 0V
100 AV = 10 10 AV = 2
PHASE MARGIN (DEG)
1 AV = 1
FALLING VS = 2.5V VS = 5V
0.1
10 0 -55 -25
50 25 75 0 TEMPERATURE (C)
100
125
0.01 100k
1M 10M FREQUENCY (Hz)
100M
LT6202/03/04 G26
LT6202/03/04 G25
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LT6202/LT6203/LT6204 TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio vs Frequency
120
COMMON MODE REJECTION RATIO (dB)
COMMON MODE REJECTION RATIO (dB)
VS = 5V, 0V VCM = VS/2
100 80 60 40 20 0 10k
VOLTAGE GAIN (dB)
100k
1M 10M FREQUENCY (Hz)
100M
Series Output Resistor vs Capacitive Load
40 35 30 OVERSHOOT (%) 25 20 15 10 5 0 10 100 CAPACITIVE LOAD (pF) 1000
LT6202/03/04 G29
25 20 15 10 5 0 10 100 CAPACITIVE LOAD (pF) 1000
LT6202/03/04 G30
SETTLING TIME (ns)
RS = 10 OVERSHOOT (%)
RS = 20
VIN
RS = 20
RS = 50 RL = 50
100
1mV
RS = 50 RL = 50
50
10mV 10mV
0 -4 -3 -2 1 2 -1 0 OUTPUT STEP (V) 3 4
Settling Time vs Output Step (Inverting)
200 VS = 5V AV = -1 TA = 25C
10
500
Maximum Undistorted Output Signal vs Frequency
AV = 2 AV = -1 8
Distortion vs Frequency
-40 -50 AV = 1 VS = 2.5V VOUT = 2V(P-P) RL = 100, 3RD RL = 100, 2ND
VIN
150
SETTLING TIME (ns)
DISTORTION (dBc)
100 1mV 50 10mV 10mV 0 -4 -3 -2 1 2 -1 0 OUTPUT STEP (V) 3 4 1mV
+
-
500
VOUT
OUTPUT VOLTAGE SWING (VP-P)
9
7 6 5 4 3 VS = 5V TA = 25C HD2, HD3 < -40dBc 100k 1M FREQUENCY (Hz) 10M
LT6202/03/04 G33
-60 -70 -80 -90
2 10k
-100 10k
100k 1M FREQUENCY (Hz)
LT6202/03/04 G32
+
30
150
-
VS = 5V, 0V AV = 1
UW
1G
LT6202/03/04 G27
Channel Separation vs Frequency
-40 -50 -60 -70 -80 -90 -100 -110 -120 0.1 1 10 FREQUENCY (MHz) 100
LT6202/03/04 G27.1
Power Supply Rejection Ratio vs Frequency
80 70 60 50 40 30 20 10 0 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M NEGATIVE SUPPLY POSITIVE SUPPLY VS = 5V, 0V TA = 25C VCM = VS/2
TA = 25C AV = 1 VS = 5V
LT6202/03/04 G28
Series Output Resistor vs Capacitive Load
40 35 VS = 5V, 0V AV = 2
Settling Time vs Output Step (Noninverting)
200 VS = 5V AV = 1 TA = 25C
RS = 10
VOUT 500
1mV
LT6202/03/04 G31
RL = 1k, 3RD RL = 1k, 2ND 10M
LT6202/03/04 G34
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LT6202/LT6203/LT6204 TYPICAL PERFOR A CE CHARACTERISTICS
Distortion vs Frequency
-40 -50 AV = 1 VS = 5V VOUT = 2V(P-P)
DISTORTION (dBc)
DISTORTION (dBc)
-60 -70 -80
RL = 100, 3RD RL = 100, 2ND
RL = 100, 2ND
DISTORTION (dBc)
RL = 1k, 2ND -90 RL = 1k, 3RD -100 10k 100k 1M FREQUENCY (Hz) 10M
LT6202/03/04 G35
5V Large-Signal Response
5V 50mV/DIV
1V/DIV
0V
VS = 5V, 0V AV = 1 RL = 1k
5V Large-Signal Response
5V VOUT VIN (2V/DIV) (1V/DIV)
2V/DIV
0V
-5V
VS = 5V AV = 1 RL = 1k
14
UW
Distortion vs Frequency
-30 -40 -50 -60 -70 -80 RL = 1k, 3RD -90 -100 10k RL = 1k, 2ND 100k 1M FREQUENCY (Hz) 10M
LT6202/03/04 G36
Distortion vs Frequency
-40 AV = 2 RL = 100, 3RD VS = 5V VOUT = 2V(P-P) RL = 100, 2ND
AV = 2 VS = 2.5V VOUT = 2V(P-P)
-50
RL = 100, 3RD
-60 -70 -80 -90
RL = 1k, 2ND RL = 1k, 3RD
-100 10k
100k 1M FREQUENCY (Hz)
10M
LT6202/03/04 G37
5V Small-Signal Response
0V
200ns/DIV
LT6202/03/04 G38
200ns/DIV VS = 5V, 0V AV = 1 RL = 1k
LT6202/03/04 G39
Output-Overdrive Recovery
0V
0V
200ns/DIV
LT6202/03/04 G40
200ns/DIV VS = 5V, 0V AV = 2
LT6202/03/04 G41
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LT6202/LT6203/LT6204
APPLICATIO S I FOR ATIO
Amplifier Characteristics
Figure 1 shows a simplified schematic of the LT6202/ LT6203/LT6204, which has two input differential amplifiers in parallel that are biased on simultaneously when the common mode voltage is at least 1.5V from either rail. This topology allows the input stage to swing from the positive supply voltage to the negative supply voltage. As the common mode voltage swings beyond VCC - 1.5V, current source I1 saturates and current in Q1/Q4 is zero. Feedback is maintained through the Q2/Q3 differential amplifier, but with an input gm reduction of 1/2. A similar effect occurs with I2 when the common mode voltage swings within 1.5V of the negative rail. The effect of the gm reduction is a shift in the VOS as I1 or I2 saturate.
R1
I1
-V DESD1
+V Q5 DESD2 Q2 D1 D2 Q1 Q3 Q4 +V C1 +V Q9 DESD4 Q8 Q7 Q10 -V R3 I2 R4 R5 D3 V-
6203/04 F01
+ -
DESD3 -V +V
Figure 1. Simplified Schematic
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Input bias current normally flows out of the + and - inputs. The magnitude of this current increases when the input common mode voltage is within 1.5V of the negative rail, and only Q1/Q4 are active. The polarity of this current reverses when the input common mode voltage is within 1.5V of the positive rail and only Q2/Q3 are active. The second stage is a folded cascode and current mirror that converts the input stage differential signals to a single ended output. Capacitor C1 reduces the unity cross frequency and improves the frequency stability without degrading the gain bandwidth of the amplifier. The differential drive generator supplies current to the output transistors that swing from rail-to-rail.
+
R2 V+ VBIAS Q11
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U
-
Q6
CM DIFFERENTIAL DRIVE GENERATOR DESD5
DESD6
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LT6202/LT6203/LT6204
APPLICATIO S I FOR ATIO
Input Protection There are back-to-back diodes, D1 and D2, across the + and - inputs of these amplifiers to limit the differential input voltage to 0.7V. The inputs of the LT6202/LT6203/ LT6304 do not have internal resistors in series with the input transistors. This technique is often used to protect the input devices from over voltage that causes excessive currents to flow. The addition of these resistors would significantly degrade the low noise voltage of these amplifiers. For instance, a 100 resistor in series with each input would generate 1.8nV/Hz of noise, and the total amplifier noise voltage would rise from 1.9nV/Hz to 2.6nV/Hz. Once the input differential voltage exceeds 0.7V, steady state current conducted though the protection diodes should be limited to 40mA. This implies 25 of protection resistance per volt of continuous overdrive beyond 0.7V. The input diodes are rugged enough to handle transient currents due to amplifier slew rate overdrive or momentary clipping without these resistors. Figure 2 shows the input and output waveforms of the amplifier driven into clipping while connected in a gain of AV = 1. When the input signal goes sufficiently beyond the power supply rails, the input transistors will saturate. When saturation occurs, the amplifier loses a stage of phase inversion and the output tries to change states. Diodes D1 and D2 forward bias and hold the output within
OV
LT6202/03/04 F02
Figure 2. VS = 2.5V, AV = 1 with Large Overdrive
16
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a diode drop of the input signal. In this photo, the input signal generator is clipping at 35mA, and the output transistors supply this generator current through the protection diodes. With the amplifier connected in a gain of AV 2, the output can invert with very heavy input overdrive. To avoid this inversion, limit the input overdrive to 0.5V beyond the power supply rails. ESD The LT6202/LT6203/LT6204 have reverse-biased ESD protection diodes on all inputs and outputs as shown in Figure 1. If these pins are forced beyond either supply, unlimited current will flow through these diodes. If the current is transient and limited to one hundred milliamps or less, no damage to the device will occur. Noise The noise voltage of the LT6202/LT6203/LT6204 is equivalent to that of a 225 resistor, and for the lowest possible noise it is desirable to keep the source and feedback resistance at or below this value, i.e. RS + RG||RFB 225. With RS + RG||RFB = 225 the total noise of the amplifier is: en = (1.9nV)2 + (1.9nV)2 = 2.7nV. Below this resistance value, the amplifier dominates the noise, but in the resistance region between 225 and approximately 10k, the noise is dominated by the resistor thermal noise. As the total resistance is further increased, beyond 10k, the noise current multiplied by the total resistance eventually dominates the noise. The product of en * ISUPPLY is an interesting way to gauge low noise amplifiers. Many low noise amplifiers with low en have high ISUPPLY current. In applications that require low noise with the lowest possible supply current, this product can prove to be enlightening. The LT6202/LT6203/ LT6204 have an en, ISUPPLY product of 3.2 per amplifier, yet it is common to see amplifiers with similar noise specifications have an en * ISUPPLY product of 4.7 to 13.5. For a complete discussion of amplifier noise, see the LT1028 data sheet.
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LT6202/LT6203/LT6204
TYPICAL APPLICATIO S
Low Noise, Low Power 1M AC Photodiode Transimpedance Amplifier Figure 3 shows the LT6202 applied as a transimpedance amplifier (TIA). The LT6202 forces the BF862 ultralownoise JFET source to 0V, with R3 ensuring that the JFET has an IDRAIN of 1mA. The JFET acts as a source follower, buffering the input of the LT6202 and making it suitable for the high impedance feedback elements R1 and R2. The BF862 has a minimum IDSS of 10mA and a pinchoff voltage between -0.3V and -1.2V. The JFET gate and the LT6202
VS+ R1 499k R2 499k
PHILIPS BF862 C1 1pF LT6202 VOUT
VBIAS-
R3 4.99k VS = 5V VS-
LT6202/03/04 F03
Figure 3. Low Noise, Low Power 1M AC Photodiode Transimpedance Amplifier
R4 10M VBIAS-
R5 10k C3 1F
LTC2050HV
R3 4.99k VS = 5V VS-
LT6202/03/04 F04
Figure 4. Precision Low Noise, Low Power Transimpedance Amplifier
+
-
+
-
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output therefore sit at a point slightly higher than one pinchoff voltage below ground (typically about -0.6V). When the photodiode is illuminated, the current must come from the LT6202's output through R1 and R2, as in a normal TIA. Amplifier input noise density and gainbandwidth product were measured at 2.4nV/Hz and 100MHz, respectively. Note that because the JFET has a high gm, approximately 1/80, its attenuation looking into R3 is only about 2%. Gain-bandwidth product was measured at 100MHz and the closed-loop bandwidth using a 3pF photodiode was approximately 1.4MHz. Precision Low Noise, Low Power, 1M Photodiode Transimpedance Amplifier Figure 4 shows the LT6202 applied as a transimpedance amplifier (TIA), very similar to that shown in Figure 3. In this case, however, the JFET is not allowed to dictate the DC-bias conditions. Rather than being grounded, the LT6202's noninverting input is driven by the LTC2050 to the exact state necessary for zero JFET gate voltage. The noise performance is nearly identical to that of the circuit in Figure 3, with the additional benefit of excellent DC performance. Input offset was measured at under 200V and output noise was within 2mVP-P over a 20MHz bandwidth.
VS+ R1 499k R2 499k
+
C2 0.1F
-
PHILIPS BF862 C1 1pF
LT6202
VOUT
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LT6202/LT6203/LT6204
TYPICAL APPLICATIO S
Single-Supply 16-Bit ADC Driver Figure 5 shows the LT6203 driving an LTC1864 unipolar 16-bit A/D converter. The bottom half of the LT6203 is in a gain-of-one configuration and buffers the 0V negative full-scale signal VLOW into the negative input of the LTC1864. The top half of the LT6203 is in a gain-of-ten configuration referenced to the buffered voltage VLOW and drives the positive input of the LTC1864. The input range of the LTC1864 is 0V to 5V, but for best results the input range of VIN should be from VLOW (about 0.4V) to about 0.82V. Figure 6 shows an FFT obtained with a 10.1318kHz coherent input waveform, from 8192 samples with no windowing or averaging. Spurious free dynamic range is seen to be about 100dB. Although the LTC1864 has a sample rate far below the gain bandwidth of the LT6203, using this amplifier is not necessarily a case of overkill. The designer is reminded that A/D converters have sample apertures that are vanishingly small (ideally, infinitesimally small) and make demands on the upstream circuitry far in excess of what is implied by the innocent-looking sample rate. In addition, when an A/D converter takes a sample, it applies a small capacitor to its inputs with a fair amount of glitch energy and expects the voltage on the capacitor to settle to the true value very quickly. Finally, the LTC1864 has a 20MHz analog input bandwidth and can be used in undersampling applications, again requiring a source bandwidth higher than Nyquist.
VIN = 0.6VDC 200mVAC
VLOW = 0.4VDC
+
1/2 LT6203
-
LT6202/03/04 F05
SFDR (dB)
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+
1/2 LT6203
R3 100
5V
-
R1 1k C1 470pF R2 110
+ -
R4 100
LTC1864 16-BIT 250ksps
SERIAL DATA OUT
Figure 5. Single-Supply 16-Bit ADC Driver
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150
fS = 250ksps fIN = 10.131836kHz
0 12.5 25 37.5 50 62.5 75 82.5 100 112.5 125 FREQUENCY (kHz)
LT6202/03/04 F06
Figure 6. FFT Showing 100dB SFDR
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PACKAGE DESCRIPTIO U
DD Package 8-Lead Plastic DFN (3mm x 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115 TYP 5 0.675 0.05 0.38 0.10 8 3.00 0.10 (4 SIDES) PACKAGE OUTLINE 0.28 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK
(DD8) DFN 0203
3.5 0.05 1.65 0.05 2.15 0.05 (2 SIDES)
1.65 0.10 (2 SIDES)
0.200 REF
0.75 0.05
4 0.28 0.05 2.38 0.10 (2 SIDES)
1 0.50 BSC
0.00 - 0.05
BOTTOM VIEW--EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED
GN Package 16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.045 .005 .189 - .196* (4.801 - 4.978) 16 15 14 13 12 11 10 9
.009 (0.229) REF
.254 MIN
.150 - .165 .229 - .244 (5.817 - 6.198) .150 - .157** (3.810 - 3.988)
.0165 .0015
.0250 TYP 1 .015 .004 x 45 (0.38 0.10) .053 - .068 (1.351 - 1.727) 23 4 56 7 8 .004 - .0098 (0.102 - 0.249)
RECOMMENDED SOLDER PAD LAYOUT
.007 - .0098 (0.178 - 0.249) .016 - .050 (0.406 - 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS)
0 - 8 TYP
.008 - .012 (0.203 - 0.305)
.0250 (0.635) BSC
3. DRAWING NOT TO SCALE *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
GN16 (SSOP) 0502
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19
LT6202/LT6203/LT6204
PACKAGE DESCRIPTIO U
MS8 Package 8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 0.127 (.035 .005) 3.2 - 3.45 (.126 - .136) 0.65 (.0256) BSC 3.00 0.102 (.118 .004) (NOTE 3) 8 7 65 0.52 (.206) REF DETAIL "A" 0 - 6 TYP 4.90 0.15 (1.93 .006) 3.00 0.102 (.118 .004) NOTE 4 0.53 0.015 (.021 .006) DETAIL "A" 0.18 (.077) SEATING PLANE 0.22 - 0.38 (.009 - .015) TYP 0.13 0.076 (.005 .003)
MSOP (MS8) 0802
5.23 (.206) MIN
0.42 0.04 (.0165 .0015) TYP
RECOMMENDED SOLDER PAD LAYOUT
0.254 (.010) GAUGE PLANE
1 1.10 (.043) MAX
23
4 0.86 (.034) REF
NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.65 (.0256) BSC
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20
LT6202/LT6203/LT6204
PACKAGE DESCRIPTIO U
S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 - .197 (4.801 - 5.004) NOTE 3 8 7 6 5 .045 .005 .050 BSC .160 .005 .228 - .244 (5.791 - 6.197) .150 - .157 (3.810 - 3.988) NOTE 3 1 2 3 4 .053 - .069 (1.346 - 1.752) 0- 8 TYP .004 - .010 (0.101 - 0.254) .014 - .019 (0.355 - 0.483) TYP .050 (1.270) BSC
SO8 0303
.245 MIN
.030 .005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 - .020 x 45 (0.254 - 0.508) .008 - .010 (0.203 - 0.254)
.016 - .050 (0.406 - 1.270) NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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21
LT6202/LT6203/LT6204
PACKAGE DESCRIPTIO U
S Package 14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.045 .005 .050 BSC N 14 13 .337 - .344 (8.560 - 8.738) NOTE 3 12 11 10 9 8 N .160 .005 .228 - .244 (5.791 - 6.197) 1 .030 .005 TYP 2 3 N/2 N/2 .150 - .157 (3.810 - 3.988) NOTE 3 1 .010 - .020 x 45 (0.254 - 0.508) .008 - .010 (0.203 - 0.254) 0 - 8 TYP 2 3 4 5 6 7 .053 - .069 (1.346 - 1.752) .004 - .010 (0.101 - 0.254) .014 - .019 (0.355 - 0.483) TYP .050 (1.270) BSC
S14 0502
.245 MIN
RECOMMENDED SOLDER PAD LAYOUT
.016 - .050 (0.406 - 1.270) NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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22
LT6202/LT6203/LT6204
PACKAGE DESCRIPTIO U
S5 Package 5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 2.80 BSC 1.50 - 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 - 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 - 0.90 0.20 BSC 1.00 MAX DATUM `A' 0.01 - 0.10 1.90 BSC
S5 TSOT-23 0302
3.85 MAX 2.62 REF
0.30 - 0.50 REF 0.09 - 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193
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Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
23
LT6202/LT6203/LT6204
TYPICAL APPLICATIO
R1 402 0dB R2 200 6dB R3 100 12dB R4 402 0dB R5 200 6dB R6 100 12dB
Low Noise Differential Amplifier with Gain Adjust and Common Mode Control
C1 270pF C2 22pF C3 5pF VOUT+
VIN-
1/2 LT6203
VIN+
RB R8 402
0.1F OUTPUT VCM =
Low Noise Differential Amplifier Frequency Response
RELATIVE DIFFERENTIAL GAIN (1dB/DIV)
G = 0dB G = 6dB G = 12dB 50k 1M FREQUENCY (Hz) 5M
LT6202/03/04 F08
RELATED PARTS
PART NUMBER LT1028 LT1677 LT1722/LT1723/LT1724 LT1800/LT1801/LT1802 LT1806/LT1807 LT6200 DESCRIPTION Single, Ultralow Noise 50MHz Op Amp Single, Low Noise Rail-to-Rail Amplifier Single/Dual/Quad Low Noise Precision Op Amps Single/Dual/Quad Low Power 80MHz Rail-to-Rail Op Amps Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifiers Single Ultralow Noise Rail-to-Rail Amplifier COMMENTS 1.1nV/Hz 3V Operation, 2.5mA, 4.5nV/Hz, 60V Max V0S 70V/s Slew Rate, 400V Max VOS, 3.8nV/Hz, 3.7mA 8.5nV/Hz, 2mA Max Supply 2.5V Operation, 550V Max VOS, 3.5nV/Hz 0.95nV/Hz, 165MHz Gain Bandwidth
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507
q
www.linear.com
+
V+
RA
-
+
-
U
R7, 402 V
+
R10, 402
R9 402
1/2 LT6203
VOUT-
(
RB V+ RA + R B
LT6202/03/04 F07
)
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(c) LINEAR TECHNOLOGY CORPORATION 2002

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