View LT17831_578092.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LT1783 1.25MHz, Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23 FEATURES
n n n n n n n n n n n n n n
DESCRIPTION
The LT(R)1783 is a 1.25MHz op amp available in the small SOT-23 package that operates on all single and split supplies with a total voltage of 2.5V to 18V. The amplifier draws less than 300A of quiescent current and has reverse-battery protection, drawing negligible current for reverse supply voltages up to 18V. The input range of the LT1783 includes ground, and a unique feature of this device is its Over-The-Top(R) operation capabilitity with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring even when the inputs are 9V below the negative supply. The LT1783 can drive loads up to 18mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current to 5A. The LT1783 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring lower power, refer to the LT1782.
L, LT, LTC, LTM and Over-The-Top are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Operates with Inputs Above V+ Rail-to-Rail Input and Output Micropower: 300A Supply Current Max Operating Temperature Range: -40C to 125C Gain Bandwidth Product: 1.25MHz Slew Rate: 0.42V/s Low Input Offset Voltage: 800V Max Single Supply Input Range: 0V to 18V High Output Current: 18mA Min Specified on 3V, 5V and 5V Supplies Output Shutdown on 6-Lead Version Reverse-Battery Protection to 18V High Voltage Gain: 1500V/mV Low Profile (1mm) ThinSOTTM Package
APPLICATIONS
n n n n n n n
Portable Instrumentation Battery- or Solar-Powered Systems Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters
TYPICAL APPLICATION
Positive Supply Rail Current Sense
V+ 5V TO 18V PERCENTAGE OF AMPLIFIERS 200 5V 0.2 200 25
Distribution of Input Offset Voltage
VS = 5V, 0V VCM = 2.5V
20
+
LT1783 2N3904 VOUT = 2(ILOAD) 0V TO 4.3V 2k
1783 TA01
15
10
-
LOAD
ILOAD
5
0 -900
-600 -300 0 300 600 INPUT OFFSET VOLTAGE (V)
900
1783fb
1783 TA01b
1
LT1783 ABSOLUTE MAXIMUM RATINGS (Note 1)
Total Supply Voltage (V+ to V-) ................................ 18V Input Differential Voltage.......................................... 18V Input Pin Voltage to V- ................................ +24V/-10V Shutdown Pin Voltage Above V- ............................. 18V Shutdown Pin Current ........................................ 10mA Output Short-Circuit Duration (Note 2) ........... Indefinite Operating Temperature Range (Note 3) LT1783C ............................................. -40C to 85C LT1783I .............................................. -40C to 85C LT1783H ........................................... -40C to 125C Specified Temperature Range (Note 4) LT1783C ............................................. -40C to 85C LT1783I .............................................. -40C to 85C LT1783H ........................................... -40C to 125C Junction Temperature ......................................... 150C Storage Temperature Range.................. -65C to 150C Lead Temperature (Soldering, 10 sec) ................. 300C
PIN CONFIGURATION
TOP VIEW OUT 1 V- 2 +IN 3
+-
TOP VIEW 5V
+
OUT 1 V- 2
+-
+ 6V
5 SHDN 4 -IN
4 -IN
+IN 3
S5 PACKAGE 5-LEAD PLASTIC SOT-23 TJMAX = 150C, JA = 250C/W
S6 PACKAGE 6-LEAD PLASTIC SOT-23 TJMAX = 150C, JA = 230C/W
ORDER INFORMATION
LEAD FREE FINISH LTC1783CS5#PBF LTC1783IS5#PBF LTC1783HS5#PBF LTC1783CS6#PBF LTC1783IS6#PBF LTC1783HS6#PBF LEAD BASED FINISH LTC1783CS5 LTC1783IS5 LTC1783HS5 LTC1783CS6 LTC1783IS6 LTC1783HS6 TAPE AND REEL LTC1783CS5#TRPBF LTC1783IS5#TRPBF LTC1783HS5#TRPBF LTC1783CS6#TRPBF LTC1783IS6#TRPBF LTC1783HS6#TRPBF TAPE AND REEL LTC1783CS5#TR LTC1783IS5#TR LTC1783HS5#TR LTC1783CS6#TR LTC1783IS6#TR LTC1783HS6#TR PART MARKING LTLF LTLG LTXR LTIU LTIV LTXS PART MARKING LTLF LTLG LTXR LTIU LTIV LTXS PACKAGE DESCRIPTION 5-Lead Plastic SOT-23 5-Lead Plastic SOT-23 5-Lead Plastic SOT-23 6-Lead Plastic SOT-23 6-Lead Plastic SOT-23 6-Lead Plastic SOT-23 PACKAGE DESCRIPTION 5-Lead Plastic SOT-23 5-Lead Plastic SOT-23 5-Lead Plastic SOT-23 6-Lead Plastic SOT-23 6-Lead Plastic SOT-23 6-Lead Plastic SOT-23 TEMPERATURE RANGE -40C to 85C -40C to 85C -40C to 125C -40C to 85C -40C to 85C -40C to 125C TEMPERATURE RANGE -40C to 85C -40C to 85C -40C to 125C -40C to 85C -40C to 85C -40C to 125C
Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
1783fb
2
LT1783 ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
CONDITIONS TA = 25C 0C TA 70C -40C TA 85C
l l l l l l l l
MIN
LT1783C/LT1783I TYP MAX 400 800 950 1100 5 8 7 80 60
UNITS V V V V/C nA A nA A nA nA/C VP-P nV/Hz pA/Hz M G M pF V dB dB dB V/mV V/mV V/mV V/mV V/mV V/mV mV mV mV V V V V mA mA mA mA V V A A A A nA A A A A
1783fb
IOS IB
Input Offset Voltage Drift (Note 9) Input Offset Current VCM = 18V (Note 5) Input Bias Current VCM = 18V (Note 5) SHDN or VS = 0V, VCM = 0V to 18V Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = 0V to (VCC - 1V) Common Mode, VCM = 0V to 18V
2 4 45 35 0.1 0.06 0.6 20 0.14 1.3 1 0.5 5 100 80 100 1500
en in RIN
l l l
0.65 0.3 0 90 68 90 200 133 100 400 250 200
CIN CMRR PSRR AVOL
Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note 5) Power Supply Rejection Ratio Large-Signal Voltage Gain
18
VOL
Output Voltage Swing LOW
VOH
Output Voltage Swing HIGH
ISC
Short-Circuit Current (Note 2)
VCM = 0V to VCC - 1V VCM = 0V to 18V (Note 8) VS = 3V to 12.5V, VCM = VO = 1V VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 3V, 0C TA 70C VS = 3V, -40C TA 85C VS = 5V, VO = 500mV to 4.5V, RL = 10k VS = 5V, 0C TA 70C VS = 5V, -40C TA 85C No Load ISINK = 5mA VS = 5V, ISINK = 10mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA VS = 3V, Short to GND VS = 3V, Short to VCC VS = 5V, Short to GND VS = 5V, Short to VCC IS = -100A 0C TA 70C -40C TA 85C VPIN5 = 2V, No Load (Note 10) VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 5V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 18V, No Load (Note 10)
l l l l l l l l l l l l l l
1500
2.91 2.6 4.91 4.5 5 15 15 20 18
IS
Minimum Supply Voltage Reverse Supply Voltage Supply Current (Note 6) Supply Current, SHDN Shutdown Pin Current
l l l l l l l l l
3 200 330 2.94 2.8 4.94 4.74 10 30 30 40 2.5 210
8 400 600
2.7 300 350 375 18 8 1 30
ISHDN
Shutdown Output Leakage Current Maximum Shutdown Pin Current
5 0.5 2 5 0.05 10
3
LT1783 ELECTRICAL CHARACTERISTICS
SYMBOL VL VH tON tOFF GBW PARAMETER Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Turn-On Time Turn-Off Time Gain Bandwidth Product (Note 5) Slew Rate (Note 7) Full-Power Bandwidth (Note 11) Settling Time Distortion
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
CONDITIONS (Note 10) (Note 10) VPIN5 = 5V to 0V, RL = 10k (Note 10) VPIN5 = 0V to 5V, RL = 10k (Note 10) f = 5kHz 0C TA 70C -40C TA 85C AV = -1, RL = 0C TA 70C -40C TA 85C VOUT = 2VP-P VS = 5V, VOUT = 2V to 0.1%, AV = -1 VS = 3V, VO = 2VP-P , AV = 1, RL = 10k, f = 1kHz
l l
MIN 2
LT1783C/LT1783I TYP MAX 0.3 25 3 1250
UNITS V V s s kHz kHz kHz V/s V/s V/s kHz s %
l l l l
SR
750 600 550 0.24 0.21 0.19
0.42
FPBW tS THD
66 12 0.001
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. (Note 4)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS TA = 25C 0C TA 70C -40C TA 85C
l l l l l l
LT1783C/LT1783I MIN TYP MAX 500 900 1050 1200 5 8 80
UNITS V V V V/C nA nA nA/C VP-P nV/Hz pA/Hz M M pF V dB V/mV V/mV V/mV V V V V V V mA mA dB
IOS IB
en in RIN CIN CMRR AVOL
Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio Large-Signal Voltage Gain
0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = -5V to 13V
l l l
0.65 0.3 -5 68 70 50 40
2 4 40 0.06 1 20 0.14 1.3 0.5 5 80 160
13
VOL
Output Voltage Swing LOW
VOH
Output Voltage Swing HIGH
ISC PSRR
Short-Circuit Current (Note 2) Power Supply Rejection Ratio
VCM = -5V to 13V VO = 4V, RL= 10k 0C TA 70C -40C TA 85C No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA Short to GND 0C TA 70C VS = 1.5V to 9V
l l l l l l l l l l l
4.91 4.6 4.5 18 15 90
-4.997 -4.8 -4.67 4.94 4.8 4.74 30 100
-4.992 -4.6 -4.4
1783fb
4
LT1783
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. (Note 4)
SYMBOL IS PARAMETER Supply Current 0C TA 70C -40C TA 85C VPIN5 = -3V, VS = 5V, No Load (Note 10) VPIN5 = -4.7V, VS = 5V, No Load (Note 10) VPIN5 = -3V, VS = 5V, No Load (Note 10) VPIN5 = 9V, VS = 9V (Note 10) VPIN5 = -7V, VS = 9V, No Load (Note 10) VS = 5V (Note 10) VS = 5V (Note 10) VPIN5 = 0V to -5V, RL = 10k (Note 10) VPIN5 = -5V to 0V, RL = 10k (Note 10) f = 5kHz 0C TA 70C -40C TA 85C AV = -1, RL = , VO = 4V, Measured at VO = 2V 0C TA 70C -40C TA 85C VOUT = 8VP-P VOUT = 4V to 0.1%, AV = 1 CONDITIONS
l l l l l l l l l l l l l l
ELECTRICAL CHARACTERISTICS
LT1783C/LT1783I MIN TYP MAX 230 325 375 400 20 8 30 1 -4.7
UNITS A A A A nA A A A V V s s kHz kHz kHz V/s V/s V/s kHz s
ISHDN
Supply Current, SHDN Shutdown Pin Current Maximum Shutdown Pin Current Shutdown Output Leakage Current Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Turn-On Time Turn-Off Time Gain Bandwidth Product
6 0.5 2 10 0.05 -2.8 25 3 1300
VL VH tON tOFF GBW
SR
Slew Rate
800 700 625 0.26 0.23 0.21
0.45
FPBW tS
Full-Power Bandwidth (Note 11) Settling Time
18 10
The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
SYMBOL VOS PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 9) IOS IB Input Offset Current VCM = 18V (Note 5) Input Bias Current VCM = 18V (Note 5) Input Voltage Range CMRR AVOL Common Mode Rejection Ratio Large-Signal Voltage Gain VCM = 0.3V to VCC - 1V VCM = 0.3V to 18V VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 5V, VO = 500mV to 4.5V, RL = 10k VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA PSRR Power Supply Rejection Ratio VS = 3V to 12.5V, VCM = VO = 1V CONDITIONS
l l l l l l l l l l l l l l l l l l l
MIN
LT1783H TYP 400
MAX 850 3 15 15 10 150 150
UNITS V mV V/C nA A nA A V dB dB
0.3 76 60 200 50 400 100 1500 1500
18
V/mV V/mV V/mV V/mV 15 800 1200 mV mV mV V V V V dB
1783fb
VOH
Output Voltage Swing HIGH
2.85 2.30 4.85 4 80
5
LT1783 ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER Minimum Supply Voltage Reverse Supply Voltage IS Supply Current Supply Current, SHDN ISHDN Shutdown Pin Current Output Leakage Current Maximum Shutdown Pin Current GBW SR Gain Bandwidth Product Slew Rate VPIN5 = 2V, No Load (Note 10) VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 18V, No Load (Note 10) f = 5kHz (Note 5) AV = -1, RL = (Note 7) IS = -100A
The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
CONDITIONS
l l l l l l l l l l
MIN 2.7 18
LT1783H TYP
MAX
UNITS V V
210
300 600 25
A A A nA A A A kHz kHz V/s V/s
0.5 12 2.5 40 750 400 0.24 0.12 1250 0.42
The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 5V, VCM = 0V, VOUT = 0V, VSHDN = V-, TA = -40C to 125C, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. (Note 4)
SYMBOL VOS PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 9) IOS IB CMRR AVOL VO Input Offset Current Input Bias Current Common Mode Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing VCM = -4.7V to 13V VO = 4V, RL = 10k No Load IOUT = 5mA IOUT = 10mA VS = 1.5V to 9V CONDITIONS
l l l l l l l l l l l l
MIN
LT1783H TYP 500
MAX 950 3.1 15 15 150
UNITS V mV V/C nA nA dB V/mV V/mV V V V dB V
60 70 10 4.85 4.20 3.80 80 1.35 230 325 650 25 0.5 12 45 3 -4.7 -2.8 800 425 0.26 0.14 1300 0.45 160
PSRR IS
Power Supply Rejection Ratio Minimum Supply Voltage Supply Current Supply Current, SHDN
A A A nA A A A V V kHz kHz V/s V/s
1783fb
VPIN5 = -3V, VS = 5V, No Load (Note 10) VPIN5 = -4.7V, VS = 5V, No Load (Note 10) VPIN5 = -3V, VS = 5V, No Load (Note 10) VPIN5 = 9V, VS = 9V (Note 10) VPIN5 = -7V, VS = 9V, No Load VS = 5V VS = 5V f = 5kHz AV = -1, RL = , VO = 4V Measured at VO = 2V
l l l l l l l l l
ISHDN
Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current
VL VH GBW SR
Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Gain Bandwidth Product Slew Rate
6
LT1783 ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: A heat sink may be required to keep the junction temperature below absolute maximum. Note 3: The LT1783C and LT1873I are guaranteed functional over the operating temperature range of -40C to 85C. The LT1783H is guaranteed functional over the operating temperature range of -40C to 125C. Note 4: The LT1783C is guaranteed to meet specified performance from 0C to 70C. The LT1783C is designed, characterized and expected to meet specified performance from -40C to 85C but is not tested or QA sampled at these temperatures. The LT1783I is guaranteed to meet specified performance from -40C to 85C. The LT1783H is guaranteed to meet specified performance from -40C to 125C. Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = 5V or VS = 9V tests. Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = 5V or VS = 9V tests. Note 7: Guaranteed by correlation to slew rate at VS = 5V, and GBW at VS = 3V and VS = 5V tests. Note 8: This specification implies a typical input offset voltage of 1.8mV at VCM = 18V and a maximum input offset voltage of 7.2mV at VCM = 18V. Note 9: This parameter is not 100% tested. Note 10: Specifications apply to 6-lead SOT-23 with shutdown. Note 11: Full-power bandwidth is calculated from the slew rate: FPBW = SR/2VP .
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
300 280 SUPPLY CURRENT (A) 260 240 220 200 180 160 140 120 2 4 6 8 10 12 14 SUPPLY VOLTAGE (V) 16 18 TA = -55C TA = 25C TA = 125C INPUT OFFSET VOLTAGE CHANGE (V) 400 300 200 100 0 TA = 125C -100 -200 -300 -400 0 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 5
1783 G02
Minimum Supply Voltage
5
Output Voltage vs Large Input Voltage
VS = 5V, 0V
4
VOUT (V)
TA = -55C
3 5V VIN 1 + -
2
TA = 25C
0 -10-8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 VIN (V)
1783 G02a
1783 G01
Input Bias Current vs Common Mode Voltage
50000 OUTPUT SATURATION VOLTAGE (V) 40000 30000 INPUT BIAS CURRENT (nA) 20000 10000 250 200 150 100 50 0 -50 TA = 125C 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 14 16 18 COMMON MODE VOLTAGE (V)
1783 G03
Output Saturation Voltage vs Load Current (Output High)
1 OUTPUT SATURATION VOLTAGE (V) VS = 2.5V VOD = 30mV 1
Output Saturation Voltage vs Load Current (Output Low)
VS = 2.5V VOD = 30mV
TA = 125C
0.1
TA = 125C 0.1
TA = -55C TA = 25C
TA = -55C TA = 25C
0.01
TA = 25C
TA = -55C 0.01 1 10 100 1m SOURCING LOAD CURRENT (A) 10m
1783 G04
0.001 1 100 1m 10 SINKING LOAD CURRENT (A) 10m
1783 G05
1783fb
7
LT1783 TYPICAL PERFORMANCE CHARACTERISTICS
Output Saturation Voltage vs Input Overdrive
100 OUTPUT SATURATION VOLTAGE (mV) OUTPUT HIGH NOISE VOLTAGE (400nV/DIV) 50 OUTPUT CURRENT (mA) 55
Output Short-Circuit Current vs Temperature
VS = 5V
0.1Hz to 10Hz Noise Voltage
VS = 2.5V
45
SOURCING CURRENT
10
40
SINKING CURRENT
OUTPUT LOW
35 VS = 2.5V NO LOAD 0 10 20 30 40 50 INPUT OVERDRIVE (mV) 60
1783 G06
1
30 -50
-25
0 25 50 75 TEMPERATURE (C)
100
125
0
1
2
3
456 TIME (sec)
7
8
9
10
1783 G06a
1783 G07
Noise Voltage Density vs Frequency
70 INPUT NOISE VOLTAGE DENSITY (nV/Hz) 60 50 40 30 20 10 INPUT NOISE CURRENT DENSITY (pA/Hz) VS = 2.5V 3.0 2.5 2.0
Input Noise Current vs Frequency
VS = 2.5V 70 60 50 40 GAIN (dB) 30 20 10 0 -10 -20 0 -30 1 10 100 1k FREQUENCY (Hz) 10k
1783 G09
Gain and Phase Shift vs Frequency
VS = 2.5V PHASE 120 100 80 60 40 20 GAIN 0 -20 -40 -60 1k 10k 100k 1M FREQUENCY (Hz) -80 10M
1783 G10
PHASE SHIFT (DEG)
1.5 1.0 0.5
1
10
100 1k FREQUENCY (Hz)
10k
1783 G08
Gain Bandwidth Product vs Temperature
1400 1350 GAIN BANDWIDTH (kHz) 1300 1250 1200 1150 1100 -50 f = 5kHz VS = 2.5V 0.8 0.7 SLEW RATE (V/s) 0.6 0.5 0.4 0.3
Slew Rate vs Temperature
VS = 5V RISING
FALLING
-25
0 25 50 75 TEMPERATURE (C)
100
125
0.2 -50
-25
0 25 50 75 TEMPERATURE (C)
100
125
1783 G11
1783 G12
1783fb
8
LT1783 TYPICAL PERFORMANCE CHARACTERISTICS
Gain Bandwidth Product and Phase Margin vs Supply Voltage
AV = -1 RF = RG = 10k f = 5kHz PHASE MARGIN 55 1400 1200 1000 800 1k VS = 2.5V AV = -1 RF = RG = 10k f = 5kHz 10k LOAD RESISTANCE () 100k
1783 G14
Gain Bandwidth and Phase Margin vs Load Resistance
PHASE MARGIN (DEG) 65 PHASE MARGIN (DEG) GAIN BAINDWIDTH PRODUCT (kHz) PHASE MARGIN 65 60 55
60
GAIN BAINDWIDTH PRODUCT (kHz)
1300 GAIN BANDWIDTH PRODUCT
GAIN BANDWIDTH PRODUCT
1250
1200 0 2 4 6 8 10 12 14 16 TOTAL SUPPLY VOLTAGE (V) 18
1783 G13
PSRR vs Frequency
90 POWER SUPPLY REJECTION RATIO (dB) 80 70 60 50 40 30 20 10 0 -10 1k 10k 100k FREQUENCY (Hz) 1M
1783 G15
CMRR vs Frequency
110 COMMON MODE REJECTION RATIO (dB) VS = 2.5V 100 90 80 70 60 50 40 30 10k 100k FREQUENCY (Hz) 1M
1783 G16
Output Impedance vs Frequency
100 VS = 2.5V AV = 100 OUTPUT IMPEDANCE () 10
VS = 2.5V
POSITIVE SUPPLY
1
AV = 10
NEGATIVE SUPPLY
0.1 AV = 1 0.01 100
1k
10k 100k FREQUENCY (Hz)
1M
1783 G17
Disabled Output Impedance vs Frequency (Note 8)
1M VS = 2.5V VPIN5 (SHUTDOWN) = 2.5V 4 3
Settling Time to 0.1% vs Output Step
VS = 5V AV = 1 AV = -1 30 OVERSHOOT (%) 25 20 15 10 AV = 1 -3 AV = -1 5 0 0 2 4 6 8 10 12 14 16 18 20 SETTLING TIME (s)
1783 G18
Capacitive Load Handling Overshoot vs Capacitive Load
40 VS = 5V, 0V 35 VCM = 2.5V
OUTPUT IMPEDANCE ()
100k OUTPUT STEP (V)
2 1 0 -1 -2
10k
AV = 1
1k
AV = 5
AV = 10
100 100
-4 1k 10k 100k FREQUENCY (Hz) 1M
1783 G17a
10
100 1000 CAPACITIVE LOAD (pF)
10000
1783 G19
1783fb
9
LT1783 TYPICAL PERFORMANCE CHARACTERISTICS
Undistorted Output Swing vs Frequency
12 10 OUTPUT SWING (VP-P) 8 6 4 2 VS = 2.5V VS = 5V 0.1 THD + NOISE (%) 1
Total Harmonic Distortion + Noise vs Frequency
VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 10k THD + NOISE (%) 1
Total Harmonic Distortion + Noise vs Load Resistance
VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz
0.1
VS = 1.5V VIN = 1V
0.010
AV = -1
0.01 VS = 3V, 0V VIN = 0.5V TO 2.5V 0.001 VS = 3V, 0V VIN = 0.2V TO 2.2V
0.001 DISTORTION 1% AV = 1 1k 10k FREQUENCY (Hz) 100k
1783 G20
AV = 1 0.0001 10 100 1k 10k FREQUENCY (Hz) 100k
1783 G21
0 100
0.0001 100
1k 10k LOAD RESISTANCE TO GROUND ()
100k
1783 G22
Total Harmonic Distortion + Noise vs Output Voltage Amplitude
INPUT OFFSET VOLTAGE CHANGE (50V/DIV) 10 AV = -1 RF = RG = 100k VS = 1.5V VCM = 0V AV = -1 RF = RG = 100k VS = 3V, 0V VCM = 1.5V AV = 1 VS = 3V, 0V VCM = 1.5V
Open-Loop Gain
SUPPLY CURRENT PER AMPLIFIER (A) VS = 5V RL = 2k RL = 10k RL = 50k 275 250 225 200 175 150 125 100 75 50 25 0
Supply Current vs SHDN Pin Voltage
VS = 5V, 0V TA = 125C TA = 25C TA = -55C
1 THD + NOISE (%)
0.1
0.01
AV = 1 VS = 1.5V VCM = 0V 3
0.001 0 1 2 OUTPUT VOLTAGE AMPLITUDE (VP-P)
-6 -5 -4 -3 -2 -1 0 1 2 3 OUTPUT VOLTAGE (V)
4
5
6
0
0.5 1 1.5 2 SHUTDOWN PIN VOLTAGE (V)
2.5
1783 G25
1783 G23
1783 G24
Large-Signal Response
Small-Signal Response
VS = 5V AV = 1 CL = 15pF
1783 G26
VS = 5V AV = 1 CL = 15pF
1783 G27
1783fb
10
LT1783 APPLICATIONS INFORMATION
Supply Voltage The positive supply pin of the LT1783 should be bypassed with a small capacitor (typically 0.1F) within an inch of the pin. When driving heavy loads, an additional 4.7F electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. The LT1783 is protected against reverse-battery voltages up to 18V. In the event a reverse-battery condition occurs, the supply current is less than 1nA. Inputs The LT1783 has two input stages, NPN and PNP (see the Simplified Schematic), resulting in three distinct operating regions as shown in the Input Bias Current vs Common Mode typical performance curve. For input voltages about 0.8V or more below V+, the PNP input stage is active and the input bias current is typically -40nA. When the input common mode voltage is within 0.5V of the positive rail, the NPN stage is operating and the input bias current is typically 80nA. Increases in temperature will cause the voltage at which operation switches from the PNP input stage to the NPN input stage to move towards V+. The input offset voltage of the NPN stage is untrimmed and is typically 1.8mV. A Schottky diode in the collector of the input transistors, along with special geometries for these NPN transistors, allow the LT1783 to operate with either or both of its inputs above V+. At about 0.3V above V+, the NPN input transistor is fully saturated and the input bias current is typically 30A at room temperature. The input offset voltage is typically 1.8mV when operating above V+. The LT1783 will operate with its inputs 18V above V- regardless of V+. The inputs are protected against excursions as much as 10V below V- by an internal 1k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1783 incorporates phase reversal protection to prevent the output from phase reversing for inputs up to 9V below V-. There are no clamping diodes between the inputs and the maximum differential input voltage is 18V. Output The output of the LT1783 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring input voltages within 60mV of the positive rail or within 3mV of the negative rail, gain should be taken to keep the output from clipping. The LT1783 can sink and source over 30mA at 5V supplies, sourcing current is reduced to 10mA at 3V total supplies as noted in the Electrical Characteristics. The LT1783 is internally compensated to drive at least 400pF of capacitance under any output loading conditions. A 0.22F capacitor in series with a 150 resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF at , all output currents. Distortion There are two main contributors to distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current, and distortion caused by nonlinear common mode rejection. If the op amp is operating inverting, there is no common mode induced distortion. If the op amp is operating in the PNP input stage (input is not within 0.8V of V+), the CMRR is very good, typically
1783fb
11
LT1783
100dB. When the LT1783 switches between input stages, there is significant nonlinearity in the CMRR. Lower load resistance increases the output crossover distortion but has no effect on the input stage transition distortion. For lowest distortion, the LT1783 should be operated single supply, with the output always sourcing current and with the input voltage swing between ground and (V+ - 0.8V). See the Typical Performance Characteristics curves, "Total Harmonic Distortion + Noise vs Output Voltage Amplitude." Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes performance in single supply applications where the load is returned to ground. The typical performance curve of open-loop gain for various loads shows the details. Shutdown The 6-lead part includes a shutdown feature that disables the part, reducing quiescent current and making the output high impedance. The part can be shut down by bringing the SHDN pin 1.2V or more above V-. When shut down, the supply current is about 5A and the output leakage current is less than 1A (V- VOUT V+). In normal operation, the SHDN pin can be tied to V- or left floating. See the Typical Performance Characteristics curves, "Supply Current vs Shutdown Voltage."
SIMPLIFIED SCHEMATIC
V+ Q1 D1 SHDN R1 6k Q4 J1 -IN Q17 10A +IN Q26 Q9 Q10 Q13 Q14 R3 1k Q7 Q8 Q11 Q12 Q16 Q15 Q21 Q18 Q20 OUT R2 1k Q2 D3 Q3 Q22
Q19
+
Q25 Q23
Q24
Q5
Q6
D4
D5
R4 8k
R5 8k V-
1783 SS
1783fb
12
LT1783 TYPICAL APPLICATION
Protected Fault Conditions
OK! -18V V+ LT1783 OK! 5V V+ LT1783
24V
+
REVERSE BATTERY
INPUT OVERVOLTAGE
OK!
5V
OK!
5V
18V
+
LT1783
LT1783
INPUT DIFFERENTIAL VOLTAGE
INPUTS BELOW GROUND
1783 TA03
+
1783fb
10V
13
LT1783 PACKAGE DESCRIPTION
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
3.85 MAX 2.62 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
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
1.90 BSC
S5 TSOT-23 0302 REV B
1783fb
14
LT1783 PACKAGE DESCRIPTION
S6 Package 6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
0.62 MAX
0.95 REF
2.90 BSC (NOTE 4)
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 - 1.75 (NOTE 4) PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR
0.95 BSC
0.30 - 0.45 6 PLCS (NOTE 3)
0.80 - 0.90 0.20 BSC 1.00 MAX DATUM `A' 0.01 - 0.10
0.30 - 0.50 REF
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
0.09 - 0.20 (NOTE 3)
1.90 BSC
S6 TSOT-23 0302 REV B
1783fb
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.
15
LT1783 TYPICAL APPLICATION
Current Source
VCC
LT1634-1.25
R1
+
LT1783 2N3906 1.25V R1
1783 TA02
-
IOUT =
RELATED PARTS
PART NUMBER LT1782 LT1490/LT1491 LT1636 LT1638/LT1639 DESCRIPTION Micropower, Over-The-Top SOT-23 Rail-to-Rail Input and Output Op Amp Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp Dual/Quad, 1.2MHz, 0.4V/s, Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps COMMENTS SOT-23 Package, Micropower 40A per Amplifier, Rail-to-Rail Input and Output , 200kHz GBW Single Supply Input Range: -0.4V to 44V, Micropower 50A per Amplifier, Rail-to-Rail Input and Output , 200kHz GBW 55A Supply Current, VCM Extends 44V Above VEE, Independent of VCC, MSOP Package, Shutdown Function 170A Supply Current, Single Supply Input Range: -0.4V to 44V, Rail-to-Rail Input and Output
1783fb
16 Linear Technology Corporation
(408) 432-1900 FAX: (408) 434-0507
LT 0908 REV B * PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 1999

▲Up To Search▲

Price & Availability of LT17831

	To Download LT17831 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .