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Preliminary Datasheet
SGM8521 SGM8522 SGM8524
PRODUCT DESCRIPTION
The SGM8521 (single)SGM8522 (dual) and SGM8524 (quad) are rail-to-rail input and output voltage feedback amplifiers offering low cost. They have a wide input www..com 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 SGM8521/8522/8524 provide150KHz bandwidth at a low current consumption of 4.7A per amplifier. Very low input bias currents of 0.5pA, enable the SGM8521/8522/8524 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 SGM8521 is available in the tiny SOT23-5 and SO-8 packages. The SGM8522 comes in the miniature SO-8 and MSOP-8 packages. The SGM8524 is offered in TSSOP-16 SO-16 and SO-14 packages.
150KHz, 4.7A, 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: 150KHz * 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: 4.7A/Amplifier * Small Packaging SGM8521 Available in SO-8 and SOT23-5 SGM8522 Available in SO-8 and MSOP-8 SGM8524 Available in SO-16, SO-14 and TSSOP-16
PIN CONFIGURATIONS (Top View)
SGM8521
OUT -VS 1 2 4 -IN 5 +VS
+IN 3
SOT23-5
SGM8521
NC -IN +IN -VS 1 2 3 4 8 7 6 5 NC +VS OUT NC +INA -VS OUT A -INA 1 2 3 4
SGM8522
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
5 +INB
NC = NO CONNECT
SO-8
SO-8 / MSOP-8
SGM8524
OUT A -IN A +IN A +VS +INB -IN B OUT B 1 2 3 4 5 6 7 14 OUT D 13 -IND +IN A 12 +IND +VS 11 -VS 10 +INC 9 8 -INC OUT C +INB -IN B OUT B NC 5 6 7 8 4 OUT A -IN A 1 2 3
SGM8524
16 OUT D 15 -IND
14 +IND 13 -VS 12 +INC 11 10
NC = NO CONNECT
-INC OUT C NC
9
SO-14
SO-16/TSSOP-16
Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com
REV. B
ELECTRICAL CHARACTERISTICS : VS = +5V
(At RL = 500k connected to Vs/2 and VOUT = Vs/2, unless otherwise noted)
SGM8521/8522/8524 PARAMETER Symbol CONDITION TYP +25 INPUT CHARACTERISTICS www..com Voltage Input Offset 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 Short-Circuit 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 40 12 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 = 100K ,Vo = 0.1V to 4.9V RL =500K ,Vo = 0.015V to 4.965V
0.8 0.5 0.5 -0.1 to +5.6 91 83 100 104 1.7
3.5
mV pA pA V
MAX TYP TYP TYP MIN MIN MIN MIN TYP
72 63 84 90
dB dB dB dB V/
RL = 500K IOUT ISC
0.005 22
V mA mA
MAX MIN TYP
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 150 0.04 32 91 4.7
V V dB A
MIN MAX MIN MAX
KHz V/s s s
TYP TYP TYP TYP
TYP TYP
Specifications subject to change without notice.
SGM8521/8522/8524
PACKAGE/ORDERING INFORMATION
MODEL SGM8521 ORDER NUMBER SGM8521XN5/TR SGM8521XS/TR SGM8522XS/TR SGM8522XMS/TR SGM8524XS/TR SGM8524XS14 SGM8524XTS/TR PACKAGE DESCRIPTION SOT23-5 SO-8 SO-8 MSOP-8 SO-16 SO-14 TSSOP-16 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 MARKING INFORMATION 8521 SGM8521XS SGM8522XS SGM8522XMS SGM8524XS SGM8524XS14 SGM8524XTS
SGM8522
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SGM8524
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.
SGM8521/8522/8524
TYPICAL PERFORMANCE CHARACTERISTICS
At TA= +25, VS = +5V, and RL=500k connected to Vs/2,unless otherwise noted. Small-Signal Step Response
G = +1 RL = 500K CL = 20pF
Small-Signal Step Response
G = +1 RL = 500K CL = 100pF
50s/div
50mV/div
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50mV/div
50s/div
Large-Signal Step Response
Small-Signal Overshoot(%)
G = +1 CL = 100pF RL = 500K
Small-Signal Overshoot vs.Load Capacitance 50 40 30 20 10 0 G=+1 RL=500K 10 100 Load Capacitance(pF) 1000 G=-1 RFB=560K
1V/div
100s/div
Maximum Output Voltage vs. Frequency 6 5 Output Voltage(Vp-p) 4 3 2 VS = 2.5V 1 0 1 10 Frequency(kHz) 100 VS = 5V
Maximum Output Voltage Without Slew-Rate Induced Distortion
Quiescent And Short-Circuit Current vs.Supply Voltage 6 Quiescent Current(A) 5.5 5 4.5 4 3.5 3 2 2.5 3 3.5 4 4.5 Supply Voltage(V) 5 5.5 20 17.5 Short-Circuit Current(mA)
VS = 5.5V
ISC
15 12.5
IQ
10 7.5 5
SGM8521/8522/8524
TYPICAL PERFORMANCE CHARACTERISTICS
At TA= +25, VS = +5V, and RL=500k connected to Vs/2,unless otherwise noted.
Input Voltage Noise Spectral Density vs.Frequency
CMRR And PSRR vs.Frequency 100 90 80 CMRR,PSRR(dB) 70 www..com 60 50 40 30 20 10 0 0.01 0.1 PSRR 1 10 Frequency(kHz) 100 1000 CMRR
1000
Voltage Noise(nV/ Hz)
100
10 0.01
0.1
1 Frequency(kHz)
10
100
Output Voltage Swing vs.Output Current 3 135 Output Voltage(V) 2 VS = 3V 1 -50 25 135 Sinking Current 0 0 4 8 12 16 20 Output Current(mA) Sourcing Current 25 -50
Output Voltage(V) 4 3 2 1 5
Output Voltage Swing vs.Output Current 135 VS = 5V -50 Sourcing Current
25
Sinking Current -50 135 25 15 20 25 30
0 0 5 10 Output Current(mA)
Supply Current vs.Temperature 7 6 VS=5V 5 4 3 2 -45 -25 -5 15 35 55 75 95 115 135 Temperature()
Supply Current( A)
SGM8521/8522/8524
APPLICATION NOTES
Driving Capacitive Loads
The SGM852X 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 www..com 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 SGM852X 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
SGM8521
Vn
VOUT CL
Vn
SGM8521
VOUT
SGM8521
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
SGM8521
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.
SGM8521/8522/8524
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
SGM8521
R2
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VOUT
R1
SGM8521
VOUT
Vp R3 R4 Vref
Figure 4. Differential Amplifier
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
SGM8521
Vn
SGM8521
VOUT
Vp
SGM8521
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.
SGM8521/8522/8524
PACKAGE OUTLINE DIMENSIONS
SOT23-5
D
b L
0
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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
SGM8521/8522/8524
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
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A A1
E1 E
Max
0.069 0.010 0.061 0.020 0.010 0.197 0.157 0.248 0.050 8
A2 B C D
e
E E1 e
A1
1.270TYP
0.050TYP
B A2
L
A
SGM8521/8522/8524
PACKAGE OUTLINE DIMENSIONS
MSOP-8
b
C
L
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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
A2 A
SGM8521/8522/8524
PACKAGE OUTLINE DIMENSIONS
SO-16
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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
SGM8521/8522/8524
PACKAGE OUTLINE DIMENSIONS
TSSOP-16
A b
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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
SGM8521/8522/8524
PACKAGE OUTLINE DIMENSIONS
SO-14
D
1
L2 L
R1 R
L1
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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
SGM8521/8522/8524
REVISION HISTORY
Location Page
11/06-- Data Sheet changed from Preliminary to REV. A Changes to ABSOLUTE MAXIMUM ATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 11/06-- Data Sheet changed from REV. A to REV. B Adds SO-14 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 3
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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
SGM8521/8522/8524

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