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SGM8531 SGM8532 SGM8534
PRODUCT DESCRIPTION
The SGM8531 (single)SGM8532 (dual) and SGM8534 (quad) are rail-to-rail input and output voltage feedback amplifiers offering low cost. They have a wide input common-mode voltage range and output voltage swing, and take the minimum operating supply voltage down to 2.1V and the maximum recommended supply voltage is 5.5 V. All are specified over the extended -40C to +125C temperature range. The SGM8531/8532/8534 provide 500KHz bandwidth at a low current consumption of 18A per amplifier. Very low input bias currents of 0.5 pA, enable the SGM8531/8532/8534 to be used for integrators, photodiode amplifiers, and piezoelectric sensors. Rail-to-Rail inputs and outputs are useful to designers buffering ASIC in single-supply systems. Applications for these amplifiers include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. The SGM8531 is available in the tiny SOT23-5 and SO-8 packages. The SGM8532 comes in the miniature SO-8 and MSOP-8 packages. The SGM8534 is offered in TSSOP-14, TSSOP-16, SO-14 and SO-16 packages.
500KHz,18A, Rail-to-Rail I/O CMOS Operational Amplifier
FEATURES
* Low Cost * Rail-to-Rail Input and Output 0.8mV Typical VOS * Unity Gain Stable * Gain Bandwidth Product: : 500KHz * Very low input bias currents : 0.5pA * Operates on 2.1 V to 5.5 V Supplies * Input Voltage Range = - 0.1 V to +5.6 V with VS = 5.5V * Low Supply Current: 18A/Amplifier * Small Packaging SGM8531 Available in SO-8 and SOT23-5 SGM8532 Available in SO-8 and MSOP-8 SGM8534 Available in SO-14, SO-16, TSSOP-14 and TSSOP-16
PIN CONFIGURATIONS (Top View)
SGM8531
OUT -V S 1 2 4 -IN 5 +VS
+IN 3
SOT23-5
SGM8531
SGM8532
8 7 6 5 NC +V S OUT NC OUT A -INA +INA -V S 1 2 3 4 8 7 6 +VS OUT B -INB
APPLICATIONS
ASIC Input or Output Amplifier Sensor Interface Piezo Electric Transducer Amplifier Medical Instrumentation Mobile Communication Audio Output Portable Systems Smoke Detectors Mobile Telephone Notebook PC PCMCIA cards Battery-Powered equipment
NC -IN +IN -VS
1 2 3 4
NC = NO CONNECT
5 +INB
SO-8
SO-8 / MSOP-8
SGM8534 SGM8534
OUT A -IN A +IN A +V S +IN B -IN B OUT B 1 2 3 4 5 6 7 14 13 OUT D -IN D OUT A -IN A +IN A +V S +IN B -IN B OUT B NC 1 2 3 4 5 6 7 8
NC = NO CONNECT
16 15
OUT D -IN D
14 +IN D 13 -V S 12 +IN C 11 10 9 -IN C OUT C NC
12 +IN D 11 -V S 10 +IN C 9 8 -IN C OUT C
SO-14 / TSSOP-14
SO-16 / TSSOP-16
Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com
REV. C
ELECTRICAL CHARACTERISTICS : VS = +5V
(At RL = 200k connected to Vs/2 and VOUT = Vs/2, unless otherwise noted)
SGM8531/8532/8534 PARAMETER Symbol CONDITION TYP +25 INPUT CHARACTERISTICS Input Offset Voltage Input Bias Current Input Offset Current Common-Mode Voltage Range Common-Mode Rejection Ratio Open-Loop Voltage Gain Input Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage Swing from Rail Output Current POWER SUPPLY 2.1 5.5 Power Supply Rejection Ratio Quiescent Current / Amplifier DYNAMIC PERFORMANCE Gain-Bandwidth Product Slew Rate Settling Time to 0.1% Overload Recovery Time NOISE PERFORMANCE Voltage Noise Density en f = 1kHz f = 10kHz 37 28 nV/ nV/
Hz Hz
MIN/MAX OVER TEMPERATURE +25 0 to 70 - 40 to - 40 to +85 +125 UNITS MIN/ MAX
VOS IB IOS VCM CMRR AOL VOS/T VS = 5.5V VS = 5.5V, VCM = -0.1V to 4 V VS = 5.5V, VCM = -0.1V to 5.6 V RL = 5K ,Vo = 0.1V to 4.9V RL =100K ,Vo = 0.035V to 4.965V
0.8 0.5 0.5 -0.1 to +5.6 92 83 100 104 1.7
3.5
3.7
4.1
5.4
mV pA pA V
MAX TYP TYP TYP MIN MIN MIN MIN TYP
72 63 84 90
72 62 84 90
71 61 84 90
71 61 82 89
dB dB dB dB V/
RL = 100K IOUT
0.008 22 20 19.1 18.8 18
V mA
MAX MIN
Operating Voltage Range PSRR IQ Vs = +2.5 V to + 5.5 V VCM = (-VS) + 0.5 IOUT = 0 CL = 100pF GBP SR tS G = +1 , 2V Output Step G = +1, 2 V Output Step VIN *Gain = Vs 500 0.2 18 16 90 18
2.5 5.5 73 26.6
2.5 5.5 71 27.4
2.5 5.5 71 29.7
V V dB A
MIN MAX MIN MAX
76 24
KHz V/s s s
TYP TYP TYP TYP
TYP TYP
Specifications subject to change without notice.
SGM8531/8532/8534
PACKAGE/ORDERING INFORMATION
MODEL SGM8531 ORDER NUMBER SGM8531XN5/TR SGM8531XS/TR SGM8532XS/TR SGM8532XMS/TR SGM8534XS/TR SGM8534 SGM8534XS14 SGM8534XTS/TR SGM8534XTS14 PACKAGE DESCRIPTION SOT23-5 SO-8 SO-8 MSOP-8 SO-16 SO-14 TSSOP-16 TSSOP-14 PACKAGE OPTION Tape and Reel, 3000 Tape and Reel, 2500 Tape and Reel, 2500 Tape and Reel, 3000 Tape and Reel, 2500 Tube Tape and Reel, 3000 Tube MARKING INFORMATION 8531 SGM8531XS SGM8532XS SGM8532XMS SGM8534XS SGM8534XS14 SGM8534XTS SGM8534XTS14
SGM8532
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to V- ........................................... 7.5 V Common-Mode Input Voltage .......................................... (-VS) - 0.5 V to (+VS )+0.5V Storage Temperature Range.................. -65 to +150 Junction Temperature ................................................160 Operating Temperature Range ............ -55 to +150
Package Thermal Resistance @ TA = 25 SOT23-5, JA.............................................................. 190/W SO-8, JA......................................................................125/W MSOP-8, JA.............................................................. 216/W SO-16, JA..................................................................... 82/W TSSOP-16, JA............................................................ 105/W Lead Temperature Range (Soldering 10 sec)
CAUTION
This integrated circuit can be damaged by ESD. Shengbang Micro-electronics recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
.....................................................260
ESD Susceptibility HBM................................................................................4000V MM....................................................................................400V
NOTES 1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
SGM8531/8532/8534
TYPICAL PERFORMANCE CHARACTERISTICS
At TA= +25, VS = +5V, and RL=200k connected to Vs/2,unless otherwise noted. Small-Signal Step Response
G = +1 CL = 100pF RL = 5K
Small-Signal Step Response
G = +1 CL = 100pF RL = 200K
20mV/div
10s/div
50mV/div
10s/div
Large-Signal Step Response
G = +1 CL = 100pF RL = 200K
Small-Signal Overshoot vs.Load Capacitance 60 Small-Signal Overshoot(%) 50 40 30 20 10 0 G = -1 RFB = 5K G = -1 RFB=100K G = +1 RL = 200K
500mV/div
20s/div
10
100 1000 Load Capacitance(pF)
10000
Small-Signal Overshoot vs.Load Capacitance 60 Small-Signal Overshoot(%) 50 40 30 20 10 0 10 100 1000 Load Capacitance(pF) 10000 G = -5 RFB = 100K
Maximum Output Voltage vs.Frequency 6 5 Output Voltage(Vp-p) VS = 5.5V 4 VS = 5V 3 2 VS = 2.5V 1 0 1 10 100 Frequency(kHz) 1000
Maximum Output Voltage Without Slew-Rate Induced Distortion
SGM8531/8532/8534
TYPICAL PERFORMANCE CHARACTERISTICS
At TA= +25, VS = +5V, and RL=200k connected to Vs/2,unless otherwise noted.
Quiescent And Short-Circuit Current vs.Supply Voltage 30 Quiescent Current(A) 27 24 21 18 15 2 2.5 3 3.5 4 4.5 Supply Voltage(V) 5 23 Short-Circuit Current(mA) 20 17 14
CMRR And PSRR vs.Frequency 100 90 80 CMRR,PSRR(dB) 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 Frequency(kHz) 1000 10000 PSRR CMRR
ISC
IQ
11 8 5.5
Input Voltage Noise Spectral Density vs.Frequency
Output Voltage Swing vs.Output Current 3 135 Sourcing Current 25 2 VS = 3V 1 -50 25 135 Sinking Current 0 0 4 8 12 16 20 -50
1000
Voltage Noise(nV/Hz)
100
10 0.01
0.1
1 Frequency(kHz)
10
100
Output Voltage(V)
Output Current(mA)
Output Voltage Swing vs.Output Current 5 135 4 Output Voltage(V) 3 2 1 135 0 0 5 10 15 20 25 30 Output Current(mA) 25 Sourcing Current 25 VS = 5V
Supply Current vs.Temperature 24 22 Supply Current(A)
-50
20 VS = 5V 18 VS = 3V 16 14 12 -50 -30 -10 10 30 50 70 Temperature() 90 110 130 VS = 2.5V
Sinking Current -50
SGM8531/8532/8534
TYPICAL PERFORMANCE CHARACTERISTICS
At TA= +25, VS = +5V, and RL=200k connected to Vs/2,unless otherwise noted.
Overload Recovery Time
Vs = 5V G = -10 VIN = 250mV
Open-Loop Gain vs.Temperature 140 130 Open-Loop Gain(dB) 120 110 100 90 80 -50 -30 -10 RL = 5k RL = 100k
2.5V
0V 250mV 0V
Time(20s/div)
10 30 50 70 Temperature()
90
110 130
Common-Mode Rejection Ratio vs.Temperature 120 110 100 CMRR(dB) 90 80 70 60 -50 -30 -10 10 30 50 70 Temperature() 90 110 130 -Vs < VCM <(+Vs) -Vs < VCM < (+Vs)-1.5V PSRR(dB) RL = 100k
Power-Supply Rejection Ratio vs.Temperature 140 130 120 110 100 90 80 -50 -30 -10 10 30 50 70 90 110 130 Temperature() RL = 100k
Offset Voltage Production Distribution 40 Percent of Amplifiers(%) 36 32 28 24 20 16 12 8 4 0
0 1 2 -3 -2.5 -2 -1.5 -1 -0.5 0.5 1.5 2.5 3
Typical production distribution of packaged units.
Offset Voltage(mV)
SGM8531/8532/8534
APPLICATION NOTES
Driving Capacitive Loads
The SGM853X can directly drive 250pF in unity-gain without oscillation. The unity-gain follower (buffer) is the most sensitive configuration to capacitive loading. Direct capacitive loading reduces the phase margin of amplifiers and this results in ringing or even oscillation. Applications that require greater capacitive drive capability should use an isolation resistor between the output and the capacitive load like the circuit in Figure 1. The isolation resistor RISO and the load capacitor CL form a zero to increase stability. The bigger the RISO resistor value, the more stable VOUT will be. Note that this method results in a loss of gain accuracy because RISO forms a voltage divider with the RLOAD.
Power-Supply Bypassing and Layout
The SGM853X family operates from either a single +2.5V to +5.5V supply or dual 1.25V to 2.75V supplies. For single-supply operation, bypass the power supply VDD with a 0.1F ceramic capacitor which should be placed close to the VDD pin. For dual-supply operation, both the VDD and the VSS supplies should be bypassed to ground with separate 0.1F ceramic capacitors. 2.2F tantalum capacitor can be added for better performance.
VDD VDD 10F
10F 0.1F
0.1F
RISO
SGM8531
Vn
VOUT CL
Vn
SGM8531
VOUT
SGM8531
VOUT 10F
VIN
Vp
Vp
Figure 1. Indirectly Driving Heavy Capacitive Load An improvement circuit is shown in Figure 2, It provides DC accuracy as well as AC stability. RF provides the DC accuracy by connecting the inverting signal with the output, CF and RIso serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier's inverting input, thereby preserving phase margin in the overall feedback loop.
VSS(GND)
0.1F
VSS
Figure 3. Amplifier with Bypass Capacitors
CF RF RISO
SGM8531
VOUT CL RL
VIN
Figure 2. Indirectly Driving Heavy Capacitive Load with DC Accuracy For no-buffer configuration, there are two others ways to increase the phase margin: (a) by increasing the amplifier's gain or (b) by placing a capacitor in parallel with the feedback resistor to counteract the parasitic capacitance associated with inverting node.
SGM8531/8532/8534
Typical Application Circuits
Differential Amplifier
The circuit shown in Figure 4 performs the difference function. If the resistors ratios are equal ( R4 / R3 = R2 / R1 ), then VOUT = ( Vp - Vn ) x R2 / R1 + Vref.
C R2 R1 VIN
SGM8531
R2 Vn Vp R3 R4 Vref
Figure 4. Differential Amplifier
VOUT
R1
SGM8531
VOUT
R3 = R1 // R2
Figure 6. Low Pass Active Filter
Instrumentation Amplifier
The circuit in Figure 5 performs the same function as that in Figure 4 but with the high input impedance.
R2 R1
SGM8531
Vn
SGM8531
VOUT
Vp
SGM8531
R3
R4
Vref
Figure 5. Instrumentation Amplifier
Low Pass Active Filter
The low pass filter shown in Figure 6 has a DC gain of ( - R2 / R1 ) and the -3dB corner frequency is 1/2R2C. Make sure the filter is within the bandwidth of the amplifier. The Large values of feedback resistors can couple with parasitic capacitance and cause undesired effects such as ringing or oscillation in high-speed amplifiers. Keep resistors value as low as possible and consistent with output loading consideration.
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
SOT23-5
D b L
0
0.20
Symbol
A A1
Dimensions In Millimeters Min
1.050 0.000 1.050 0.300 0.100 2.820 1.500 2.650 1.800 0.300 0
Dimensions In Inches Min
0.041 0.000 0.041 0.012 0.004 0.111 0.059 0.104 0.071 0.012 0
Max
1.250 0.100 1.150 0.400 0.200 3.020 1.700 2.950 2.000 0.600 8
Max
0.049 0.004 0.045 0.016 0.008 0.119 0.067 0.116 0.079 0.024 8
E1
A2 b c
E
L
e e1 A1
D
C
E E1 e e1
0.950TYP 0.700REF
0.037TYP 0.028REF
A2
L L1
A
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
SO-8
D C
Symbol
L
Dimensions In Millimeters Min Max
1.750 0.250 1.550 0.510 0.250 5.000 4.000 6.300 1.270 8 1.350 0.100 1.350 0.330 0.190 4.780 3.800 5.800 0.400 0
Dimensions In Inches Min
0.053 0.004 0.053 0.013 0.007 0.188 0.150 0.228 0.016 0
Max
0.069 0.010 0.061 0.020 0.010 0.197 0.157 0.248 0.050 8
A A1
E1 E
A2 B C D
e
E E1 e
A1
1.270TYP
0.050TYP
B A2
L
A
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
MSOP-8
b
C
Symbol
A A1 A2 b c D e E E1 L
Dimensions In Millimeters Min Max
0.800 1.200 0.000 0.200 0.760 0.970 0.30 TYP 0.15 TYP 2.900 3.100 0.65 TYP 2.900 3.100 4.700 5.100 0.410 0.650 0 6
Dimensions In Inches Min Max
0.031 0.047 0.000 0.008 0.030 0.038 0.012 TYP 0.006 TYP 0.114 0.122 0.026 TYP 0.114 0.122 0.185 0.201 0.016 0.026 0 6
E1
E
e
D
A1
L
A2 A
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
SO-16
D C
Symbol
A A1 A2 b c D E E1 e L
E1 E
Dimensions In Millimeters Min Max
1.350 1.750 0.100 0.250 1.350 1.550 0.330 0.510 0.170 0.250 9.800 10.20 3.800 4.000 5.800 6.200 1.270 (BSC) 0.400 1.270 0 8
Dimensions In Inches Min Max
0.053 0.069 0.004 0.010 0.053 0.061 0.013 0.020 0.007 0.010 0.386 0.402 0.150 0.157 0.228 0.244 0.050 (BSC) 0.016 0.050 0 8
L e A2 A1 b A
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
TSSOP-16
A b
Symbol
E1 E
Dimensions In Millimeters Min Max
5.100 4.500 0.300 0.200 6.550 1.100 0.800 1.000 0.020 0.150 0.65 (BSC) 0.500 0.700 0.25(TYP) 1 7 4.900 4.300 0.190 0.090 6.250
Dimensions In Inches Min Max
0.193 0.169 0.007 0.004 0.246 0.201 0.177 0.012 0.008 0.258 0.043 0.031 0.039 0.001 0.006 0.026 (BSC) 0.020 0.028 0.01(TYP) 1 7
PIN #1 IDENT. e A2 A
C D L H A1
A
D E b c E1 A A2 A1 e L H
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
SO-14
D
R1 1
L2
R
L
L1
INDEX 0.80.1 DEP0.20.1
Symbol
A A1 A2 A3 b b1 c c1 D E E1 e L L1 L2 R R1 h 1 2 3 4
Dimensions In Millimeters MIN NOM MAX
1.35 0.10 1.25 0.55 0.36 0.35 0.16 0.15 8.53 5.80 3.80 0.45 1.60 0.15 1.45 0.65 0.40 1.75 0.25 1.65 0.75 0.49 0.45 0.25 0.25 8.73 6.20 4.00
2
E1
E
2.00.1 BTM E-MARK DEP0.10.05
h
h e b
0.25
BB
M
3 A2 A A3
A1
4 b
0.10
0.20 8.63 6.00 3.90 1.27 BSC 0.60 0.80 1.04 REF 0.25 BSC
BASE METAL
b1
WITH PLATING
0.07 0.07 0.30 0 6 6 5 5
0.40 8 8 7 7
0.50 8 10 10 9 9
c1
c
SECTION B-B
SGM8531/8532/8534
PACKAGE OUTLINE DIMENSIONS
TSSOP-14
D
Symbol
A
2 S
Dimensions In Millimeters MIN
-- 0.05 0.90 0.34 0.20 0.20 0.10 0.10 4.86 6.20 4.30 0.45
NOM
-- -- 1.00 0.44 -- 0.22 -- 0.13 4.96 6.40 4.40 0.65 BSC 0.60 1.00 REF 0.25 BSC
MAX
1.20 0.15 1.05 0.54 0.28 0.24 0.19 0.15 5.06 6.60 4.50 0.75
A1 A2 A3 b b1 c
3
R1 R B
E1
E
B
L2
INDEX 1.00.05 0.1-0.1 DEP
+0
L L1
1
c1 D E E1
#1 PIN
e
BASE METAL
b b1 A3
e L L1 L2 R 0.09 0.09 0.20 0 10 10 R1 S 1 2 3
A2
A
A1
c1
c
-- -- -- -- 12 12
-- -- -- 8 14 14
0.10
SECTION B-B
SGM8531/8532/8534
REVISION HISTORY
Location Page
11/06-- Data Sheet changed from REV.A to REV.B Changes to ABSOLUTE MAXIMUM ATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 05/07-- Data Sheet changed from REV.B to REV.C Adds SO-14 and TSSOP-14 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1,3,14,15
Shengbang Microelectronics Co, Ltd
Unit 3, ChuangYe Plaza No.5, TaiHu Northern Street, YingBin Road Centralized Industrial Park Harbin Development Zone Harbin, HeiLongJiang 150078 P.R. China Tel.: 86-451-84348461 Fax: 86-451-84308461 www.sg-micro.com
SGM8531/8532/8534

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