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19-1089; Rev 2; 8/97
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
_______________General Description
The MAX4130-MAX4134 family of operational amplifiers combines 10MHz gain-bandwidth product and excellent DC accuracy with rail-to-rail operation at the inputs and outputs. These devices require only 900A per amplifier, and operate from either a single supply (+2.7V to +6.5V) or dual supplies (1.35V to 3.25V) with a commonmode voltage range that extends 250mV beyond VEE and VCC. They are capable of driving 250 loads and are unity-gain stable. In addition, the MAX4131/ MAX4133 feature a shutdown mode in which the outputs are placed in a high-impedance state and the supply current is reduced to only 25A per amplifier. With their rail-to-rail input common-mode range and output swing, the MAX4130-MAX4134 are ideal for lowvoltage, single-supply operation. Although the minimum operating voltage is specified at 2.7V, the devices typically operate down to 1.8V. In addition, low offset voltage and high speed make them the ideal signalconditioning stages for precision, low-voltage dataacquisition systems. The MAX4130 comes in the space-saving SOT23-5 package.
____________________________Features
o 5-Pin SOT23-5 Package (MAX4130) o +2.7V to +6.5V Single-Supply Operation o Rail-to-Rail Input Common-Mode Voltage Range o Rail-to-Rail Output Voltage Swing o 10MHz Gain-Bandwidth Product o 900A Quiescent Current per Amplifier o 25A Shutdown Function (MAX4131/MAX4133) o 200V Offset Voltage o No Phase Reversal for Overdriven Inputs o Drive 250 Loads o Stable with 160pF Capacitive Loads o Unity-Gain Stable
MAX4130-MAX4134
______________Ordering Information
PART MAX4130EUK TEMP. RANGE -40C to +85C 0C to +70C -40C to +85C -40C to +85C PINPACKAGE 5 SOT23-5 Dice* 8 SO 8 MAX SOT TOP MARK AABB -- -- --
____________________Selection Table
PART MAX4130 MAX4131 MAX4132 MAX4133 MAX4134 AMPS PER PACKAGE 1 1 2 2 4 SHUTDOWN MODE -- Yes -- Yes -- PINPACKAGE 5 SOT23-5 8 SO/MAX 8 SO/MAX 14 SO 14 SO
MAX4131C/D MAX4131ESA MAX4131EUA
Ordering Information continued at end of data sheet. *Dice are specified at TA = +25C, DC parameters only.
__________Typical Operating Circuit
+3V
________________________Applications
Battery-Powered Instruments Portable Equipment Data-Acquisition Systems Signal Conditioning Low-Power, Low-Voltage Applications
SERIAL INTERFACE 3 6 8 7 SHDN DOUT SCLK CS
MAX147
VDD AIN VREF GND 1 2
MAX4131
4 5
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4130-MAX4134
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC-VEE).....................................................7.5V IN+, IN-, SHDN Voltage ...................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration (Note 1).......................Continuous (short to either supply) Continuous Power Dissipation (TA = +70C) 5-pin SOT23-5 (derate 7.1mW/C above +70C) .........571mW 8-pin SO (derate 5.88mW/C above +70C).................471mW 8-pin MAX (derate 4.10mW/C above +70C) ............330mW 14-pin SO (derate 8.00mW/C above +70C)...............640mW Operating Temperature Range MAX413_E__ ....................................................-40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Provided that the maximum package power-dissipation rating is met.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN 2V (or open), TA = +25C, unless otherwise noted.) PARAMETER CONDITIONS MAX4130EUK MAX4131ESA Input Offset Voltage VCM = VEE to VCC MAX4131EUA MAX4132ESA/MAX4133ESD MAX4132EUA MAX4134ESD Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Voltage Range MAX4130EUK MAX4131ESA Common-Mode Rejection Ratio (VEE - 0.25V) < VCM < (VCC + 0.25V) MAX4131EUA MAX4132ESA/MAX4133ESD MAX4132EUA MAX4134ESD Power-Supply Rejection Ratio Output Resistance Off-Leakage Current VCC = 2.7V to 6.5V AV = 1 SHDN < 0.8V, VOUT = 0V to VCC VCC = 2.7V Large-Signal Voltage Gain VCC = 5V VOUT = 0.25V to 2.45V, RL = 100k VOUT = 0.4V to 2.3V, RL = 250 VOUT = 0.25V to 4.75V, RL = 100k VOUT = 0.4V to 4.6V, RL = 250 92 72 94 75 VCM = VEE to VCC VCM = VEE to VCC -1.5V < VDIFF < 1.5V VEE 0.25 67 78 68 74 66 64 78 90 98 88 94 86 84 100 0.1 0.1 108 82 108 86 dB 1 dB A dB MIN TYP 0.35 0.20 0.35 0.25 0.40 0.35 50 1 500 VCC + 0.25 MAX 1.50 0.60 1.20 0.75 1.50 1.50 150 12 nA nA k V mV UNITS
2
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN 2V (or open), TA = +25C, unless otherwise noted.) PARAMETER MAX4130/ MAX4131 Output Voltage Swing MAX4132/ MAX4133/ MAX4134 Output Short-Circuit Current SHDN Logic Threshold SHDN Input Current Operating Supply-Voltage Range Supply Current per Amplifier Shutdown Supply Current per Amplifier VCM = VOUT = VCC / 2 SHDN > 0.8V, MAX4131-MAX4134 VCC = 2.7V VCC = 5V VCC = 2.7V VCC = 5V MAX4131-MAX4134 MAX4131-MAX4134 2.7 900 1000 25 40 Low High 2.0 1 3 6.5 1050 1150 40 60 RL = 100k RL = 250 CONDITIONS RL = 100k RL = 250 VCC - VOH VOL - VEE VCC - VOH VOL - VEE VCC - VOH VOL - VEE VCC - VOH VOL - VEE MIN TYP 12 20 240 125 15 25 280 180 50 0.8 MAX 20 35 290 170 30 40 330 230 mA V A V A A mV UNITS
MAX4130-MAX4134
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN 2V (or open), TA = -40C to +85C, unless otherwise noted.) PARAMETER CONDITIONS MAX4130EUK MAX4131ESA Input Offset Voltage VCM = VEE to VCC MAX4131EUA MAX4132ESA/MAX4133ESD MAX4132EUA MAX4134ESD Input Offset Voltage Tempco Input Bias Current Input Offset Current Common-Mode Input Voltage Range MAX4130EUK MAX4131ESA Common-Mode Rejection Ratio (VEE - 0.2V) < VCM < (VCC + 0.2V) MAX4131EUA MAX4132ESA/MAX4133ESD MAX4132EUA MAX4134ESD VCM = VEE to VCC VCM = VEE to VCC VEE 0.20 62 76 60 74 58 60 3 dB 2 160 18 VCC + 0.20 MIN TYP MAX 3.50 0.75 4.40 0.95 4.70 4.00 V/C nA nA V mV UNITS
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4130-MAX4134
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN 2V (or open), TA = -40C to +85C, unless otherwise noted.) PARAMETER Power-Supply Rejection Ratio Off-Leakage Current VCC = 2.7V to 6.5V SHDN < 0.8V, VOUT = 0V to VCC VCC = 2.7V Large-Signal Voltage Gain VCC = 5V VOUT = 0.25V to 2.45V, RL = 100k VOUT = 0.4V to 2.3V, RL = 250 VOUT = 0.25V to 4.75V, RL = 100k VOUT = 0.4V to 4.6V, RL = 250 RL = 100k RL = 250 Output Voltage Swing MAX4132/ MAX4133/ MAX4134 RL = 100k RL = 250 VCC - VOH VOL - VEE VCC - VOH VOL - VEE VCC - VOH VOL - VEE VCC - VOH VOL - VEE Low MAX4131-MAX4134 MAX4131--MAX4134 MAX4131-MAX4134 2.7 VCM = VOUT = VCC / 2 SHDN < 0.8V, MAX4131-MAX4134 VCC = 2.7V VCC = 5V VCC = 2.7V VCC = 5V High 2.0 3 6.5 1100 1200 50 70 84 66 86 68 25 40 300 190 35 50 350 250 0.8 V A V A A mV dB CONDITIONS MIN 74 12 TYP MAX UNITS dB A
MAX4130/ MAX4131
SHDN Logic Threshold SHDN Input Current Operating Supply-Voltage Range Supply Current per Amplifier Shutdown Supply Current per Amplifier
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, SHDN 2V (or open), TA = +25C, unless otherwise noted.) PARAMETER Gain-Bandwidth Product Phase Margin Gain Margin Total Harmonic Distortion Slew Rate Settling Time to 0.01% Turn-On Time SHDN Delay Input Capacitance Input Noise Voltage Density Input Noise Current Density Capacitive Load Stability 4 f = 1kHz f = 1kHz AV = 1 AV = 1, VOUT = 2V step VCC = 0V to 3V step, VOUT = VCC / 2 MAX4131-MAX4134, VCC = 3V, VOUT = VCC / 2 Enable Disable f = 10kHz, VOUT = 2Vp-p (AV = 1) CONDITIONS MIN TYP 10 62 12 0.003 4 2.0 1 1 0.2 3 22 0.4 160 MAX UNITS MHz degrees dB % V/s s s s pF nV/Hz pA/Hz pF
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25C, unless otherwise noted.)
GAIN AND PHASE vs. FREQUENCY
60 AV = +1000 NO LOAD
MAX4130/34-01
MAX4130-MAX4134
GAIN AND PHASE vs. FREQUENCY (WITH CLOAD)
180 144 60 AV = +1000 RL = CL = 160pF GAIN
POWER-SUPPLY REJECTION vs. FREQUENCY
144 108 72 36 0 PHASE (DEGREES) 0 -20 PSR (dB) -40 -60 -80 -100 10 100 1k 10k 100k 1M 10M 100M AV = +1
MAX4130/34-03
MAX4130/34-02
180
40 GAIN (dB)
GAIN
108 72 PHASE (DEGREES) GAIN (dB)
40
20
36 0
20
0
PHASE
-36 -72
0 PHASE -20
-36 -72
-20
-108 -144
-108 -144
-40 100
1k
10k
100k
1M
10M
-180 100M
-40 100
1k
10k
100k
1M
10M
-180 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4130/34-05
SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE
MAX4130/34-06
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE
45 SUPPLY CURRENT (A) 40 35 30 25 20 15 10 VCC = +2.7V VCC = +6.5V
MAX4130/34-07
100 AV = +1 OUTPUT IMPEDANCE ()
1150 1100 SUPPLY CURRENT (A) 1050 1000 950 900 850 VCC = +2.7V VCC = +6.5V
50
10
1
0.10
5 0 -40 -25 -10 5 20 35 50 65 80 95 -40 -25 -10 5 20 35 50 65 80 95 TEMPERATURE (C) TEMPERATURE (C)
0.01 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz)
800
OUTPUT LEAKAGE CURRENT vs. TEMPERATURE
MAX4130/34-08
INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE
MAX4130/34-10
INPUT BIAS CURRENT vs. TEMPERATURE
MAX4130/34-11
20 15 LEAKAGE CURRENT (A) 10 5 0 -5 -10
AV = +1 SHDN = 0V VCC = +6.5V VCC = +2.7V
40 30 INPUT BIAS CURRENT (nA) 20 10 0 -10 -20 -30 -40 -50 -60 VCC = +2.7V VCC = +6.5V
60 40 20 0 -20 VCC = +2.7V, VCM = VEE -40 VCC = +6.5V, VCM = VEE -60 VCC = +6.5V, VCM = VCC
VOUT SHORT TO VEE
INPUT BIAS CURRENT (nA)
VCC = +2.7V, VCM = VCC
VOUT SHORT TO VCC
VCC = +6.5V VCC = +2.7V 20 35 50 65 80 95
-40 -25 -10
5
0
1
2
3
4
5
6
-40 -25 -10
5
20 35 50 65
80 95
TEMPERATURE (C)
COMMON-MODE VOLTAGE (V)
TEMPERATURE (C)
_______________________________________________________________________________________
5
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
____________________________ Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25C, unless otherwise noted.)
MINIMUM OPERATING VOLTAGE vs. TEMPERATURE
MAX4130/34-21 MAX4130/34-09
INPUT OFFSET VOLTAGE vs. TEMPERATURE
3.00 2.25 1.50 VOLTAGE (mV) 0.75 0 -0.75 -1.50 -2.25 -3.00 -40 -25 -10 5 20 35 50 65 80 95 TEMPERATURE (C) SO PACKAGE SOT23-5 PACKAGE 1.9 MINIMUM OPERATING VOLTAGE (V) 1.8 1.7 1.6 1.5 1.4 1.3 1.2
COMMON-MODE REJECTION vs. TEMPERATURE
COMMON-MODE REJECTION (dB) 115 110 105 100 95 90 85 80 VCM = 0.3V TO 5.3V VCM = 0.2V TO 5.2V
MAX4130/34-12
120 VCM = 0V TO 5.0V
-40 -25 -10
5
20 35 50 65
80 95
-40 -25 -10
5
20 35 50 65
80 95
TEMPERATURE (C)
TEMPERATURE (C)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
MAX4130/34-19
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
MAX4130/34-16
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
115 110 105 GAIN (dB) VCC = +2.7V RL TO VCC RL = 100k RL = 10k
MAX4130/34-18 MAX4130/34-20
120 115 110 105 GAIN (dB) 100 95 90 85 80 75 70 0 100 200 300 400 500 VCC = +6.5V RL TO VCC RL = 100k RL = 10k
130 120 110 GAIN (dB)
120
VCC = +6.5V RL TO VEE
RL = 2k RL = 500
RL = 100k 100 90 80 70 RL = 10k RL = 2k
100 95 90 85 80 75 70
RL = 2k
RL = 500
RL = 500
600
0
100
200
300
400
500
600
0
100
200
300
400
500
600
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
MAX4130/34-15
LARGE-SIGNAL GAIN vs. TEMPERATURE
115 110 VCC = +6.5V, RL TO VEE GAIN (dB) VOUT(p-p) = VCC -1V RL = 500
MAX4130/34-17
LARGE-SIGNAL GAIN vs. TEMPERATURE
130 125 120 115 110 105 100 95 90 RL = 100k VOUT(p-p) = VCC - 0.6V -40 -25 -10 5 20 35 50 65 80 95 VCC = +2.7V, RL TO VCC OR VEE VCC = +6.5V, RL TO VCC OR VEE
120 110 100 GAIN (dB) 90 80 70 60 0 100 200 300 400 500 VCC = +2.7V RL TO VEE
120
RL = 100k
RL = 2k RL = 10k
GAIN (dB)
RL = 500
105 100 95 90 85 80 VCC = +2.7V, RL TO VCC -40 -25 -10 5 20 35 50 65 80 95 VCC = +2.7V, RL TO VEE VCC = +6.5V, RL TO VCC
80 TEMPERATURE (C)
600
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
TEMPERATURE (C)
6
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
____________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25C, unless otherwise noted.)
MAX4130-MAX4134
MINIMUM OUTPUT VOLTAGE vs. TEMPERATURE
MAX4130/34-13
MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE
RL TO VEE 250 VCC - VOUT (mV) 200 150 100 50 0 -40 -25 -10 5 20 35 50 65 80 95 TEMPERATURE (C) VCC = +6.5V, RL = 100k (TOP) VCC = +2.7V, RL = 100k (BOTTOM) VCC = +2.7V, RL = 500
MAX4130/34-14
TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY
2Vp-p SIGNAL 500kHz LOWPASS FILTER RL = 10k TO VCC / 2
MAX4130/34-22A
160 RL TO VCC 140 120 VOUT - VEE (mV) 100 80 60 40 20 0 -40 -25 -10 5 VCC = +6.5V, RL = 100k VCC = +2.7V, RL = 100k 20 35 50 65 VCC = +2.7V, RL = 500 VCC = +6.5V, RL = 500
300 VCC = +6.5V, RL = 500
0.030 0.025 THD AND NOISE (%) 0.020 0.015 0.010 0.005 0 10 100 1k 10k FREQUENCY (Hz)
80 95
100k
TEMPERATURE (C)
TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK SIGNAL AMPLITUDE
MAX4130/34-23
CHANNEL SEPARATION vs. FREQUENCY
MAX4130/34-25a
MAX4131 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
AV = +1
MAX4130/34-24
0.1
CHANNEL SEPARATION (dB)
120 110 100 90 80
RL = 250 0.01 RL = 2k RL = 10k RL = 100k
VOLTAGE (50mV/div) 1k 10k 100k FREQUENCY (Hz) 1M 10M
AV = +1 10kHz SINE WAVE RL TO VCC / 2 500kHz LOWPASS FILTER
140 VS = +5V 130
THD + NOISE (%)
IN
OUT
0.001 4.0 4.2 4.4 4.6 4.8 5.0 PEAK-TO-PEAK SIGNAL AMPLITUDE (V)
TIME (200ns/div)
MAX4131 SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING)
MAX4130/34-25
MAX4131 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
MAX4130/34-26
MAX4131 LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING)
AV = -1
MAX4130/34-27
AV = -1
AV = +1
VOLTAGE (50mV/div)
VOLTAGE (2V/div)
IN
IN VOLTAGE (2V/div) OUT TIME (2s/div)
IN
OUT
OUT
TIME (200ns/div)
TIME (2s/div)
_______________________________________________________________________________________
7
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
______________________________________________________________Pin Description
MAX4130 1 2 3 4 5 -- -- -- -- -- -- MAX4131 6 4 3 2 7 1, 5 8 -- -- -- -- MAX4132 -- 4 -- -- 8 -- -- 1, 7 2, 6 3, 5 -- MAX4133 -- 4 -- -- 14 5, 7, 8, 10 -- 1, 13 2, 12 3, 11 6, 9 MAX4134 -- 11 -- -- 4 -- -- 1, 7 2, 6 3, 5 -- NAME OUT VEE IN+ INVCC N.C. SHDN OUT1, OUT2 IN1-, IN2IN1+, IN2+ SHDN1, SHDN2 OUT3, OUT4 IN3-, IN4IN3+, IN4+ Output Negative Supply. Ground for single-supply operation. Noninverting Input Inverting Input Positive Supply No Connect. Not internally connected. Shutdown Control. Tie high or leave floating to enable amplifier. Outputs for amps 1 and 2 Inverting Inputs for amps 1 and 2 Noninverting Inputs for amps 1 and 2 Shutdown Control, independent for amps 1 and 2. Tie high or leave floating to enable amplifier. Outputs for amps 3 and 4 Inverting Inputs for amps 3 and 4 Noninverting Inputs for amps 3 and 4 FUNCTION
-- -- --
-- -- --
-- -- --
-- -- --
8, 14 9, 13 10, 12
MAX4130 MAX4131 MAX4132 MAX4133 MAX4134
R3 R3
MAX4130 MAX4131 MAX4132 MAX4133 MAX4134
R3 = R1
R2
R3 = R1
R2
R1
R2
R1
R2
Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting)
8
Figure 1b. Reducing Offset Error Due to Bias Current (Inverting)
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
__________Applications Information
Rail-to-Rail Input Stage
Devices in the MAX4130-MAX4134 family of highspeed amplifiers have rail-to-rail input and output stages designed for low-voltage, single-supply operation. The input stage consists of separate NPN and PNP differential stages that combine to provide an input common-mode range that extends 0.2V beyond the supply rails. The PNP stage is active for input voltages close to the negative rail, and the NPN stage is active for input voltages near the positive rail. The input offset voltage is typically below 200V. The switchover transition region, which occurs near VCC / 2, has been extended to minimize the slight degradation in common-mode rejection ratio caused by the mismatch of the input pairs. Their low offset voltage, high bandwidth, and rail-to-rail common-mode range make these op amps excellent choices for precision, low-voltage data-acquisition systems. Since the input stage switches between the NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the transition region. Reduce the offset error caused by input bias currents flowing through external source impedances by matching the effective impedance seen by each input (Figures 1a, 1b). High source impedances, together with input capacitance, can create a parasitic pole that produces an underdamped signal response. Reducing the input impedance or placing a small (2pF to 10pF) capacitor across the feedback resistor improves response. The MAX4130-MAX4134's inputs are protected from large differential input voltages by 1k series resistors and back-to-back triple diodes across the inputs (Figure 2). For differential input voltages less than 1.8V, input resistance is typically 500k. For differential input voltages greater than 1.8V, input resistance is approximately 2k. The input bias current is given by the following equation: IBIAS = VDIFF - 1.8V 2k
MAX4130-MAX4134
1k
1k
Figure 2. Input Protection Circuit
_______________________________________________________________________________________ 9
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
Rail-to-Rail Output Stage
The minimum output voltage is within millivolts of ground for single-supply operation where the load is referenced to ground (VEE). Figure 3 shows the input voltage range and output voltage swing of a MAX4131 connected as a voltage follower. With a +3V supply and the load tied to ground, the output swings from 0.00V to 2.90V. The maximum output voltage swing depends on the load, but will be within 150mV of a +3V supply, even with the maximum load (500 to ground). Driving a capacitive load can cause instability in most high-speed op amps, especially those with low quiescent current. The MAX4130-MAX4134 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 160pF. Figure 4 gives the stable operating region for capacitive loads. Figures 5 and 6 show the response with capacitive loads and the results of adding an isolation resistor in series with the output (Figure 7). The resistor improves the circuit's phase margin by isolating the load capacitor from the op amp's output.
500 VCC = 3V, RL = 10k to VEE LOAD CAPACITANCE (pF) 450 400 350 300 250 200 150 100 50 0 TIME (1s/div) 0.1 1 10 100 LOAD RESISTANCE (k) RL to VEE VOUT = VCC/2 STABLE OPERATING REGION UNSTABLE OPERATING REGION
VOLTAGE (1V/div)
IN
OUT
Figure 3. Rail-to-Rail Input/Output Voltage Range
Figure 4. Capacitive-Load Stability
VOLTAGE (50mV/div)
OUT
VOLTAGE (50mV/div)
IN
VCC = 5V RL = 10k CL = 130pF
VCC = 5V CL = 1000pF RS = 39 IN
OUT
TIME (200ns/div)
TIME (500ns/div)
Figure 5. MAX4131 Small-Signal Transient Response with Capacitive Load
10
Figure 6. MAX4131 Transient Response to Capacitive Load with Isolation Resistor
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
Power-Up and Shutdown Mode
The MAX4130-MAX4134 amplifiers typically settle within 1s after power-up. Figures 9 and 10 show the output voltage and supply current on power-up, using the test circuit of Figure 8. The MAX4131 and MAX4133 have a shutdown option. When the shutdown pin (SHDN) is pulled low, the supply current drops below 25A per amplifier and the amplifiers are disabled with the outputs in a highimpedance state. Pulling SHDN high or leaving it floating enables the amplifier. In the dual-amplifier MAX4133, the shutdown functions operate independently. Figures 11 and 12 show the output voltage and supply current responses of the MAX4131 to a shutdown pulse, using the test circuit of Figure 8.
MAX4130-MAX4134
VCC 0V TO 2.7V STEP FOR POWER-UP TEST; 2.7V FOR SHUTDOWN ENABLE TEST. RS
*0.1F
2k
OUT
SHDN 0V TO 2.7V STEP FOR SHUTDOWN TEST 2k 10 SUPPLY-CURRENT MONITORING POINT
CL
10k
*FOR SHUTDOWN TEST ONLY.
Figure 7. Capacitive-Load Driving Circuit
Figure 8. Power-Up/Shutdown Test Circuit
VCC VOLTAGE (1V/div)
VCC (1V/div)
OUT
IEE (500A/div)
TIME (5s/div)
TIME (5s/div)
Figure 9. Power-Up Output Voltage
Figure 10. Power-Up Supply Current
11
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
SHDN VOLTAGE (1V/div)
SHDN 1V/div
OUT
SUPPLY CURRENT 500A/div
TIME (1s/div)
TIME (1s/div)
Figure 11. Shutdown Output Voltage
Figure 12. Shutdown Enable/Disable Supply Current
Power Supplies and Layout
The MAX4130-MAX4134 operate from a single +2.7V to +6.5V power supply, or from dual supplies of 1.35V to 3.25V. For single-supply operation, bypass the power supply with a 0.1F ceramic capacitor in parallel with at least 1F. For dual supplies, bypass each supply to ground.
Good layout improves performance by decreasing the amount of stray capacitance at the op amp's inputs and outputs. Decrease stray capacitance by placing external components close to the op amp's pins, minimizing trace lengths and resistor leads.
12
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
__________________________________________________________Pin Configurations
MAX4130-MAX4134
TOP VIEW
OUT 1
5
VCC
VEE 2
MAX4130
IN+ 3
4
IN-
SOT23-5
N.C. 1 IN1- 2 IN1+ 3 VEE 4
8
SHDN VCC OUT N.C.
OUT1 1 IN1- 2 IN1+ 3 VEE 4
8
VCC OUT2 IN2IN2+
MAX4131
7 6 5
MAX4132
7 6 5
SO/MAX
SO/MAX
OUT1 1 IN1- 2 IN1+ 3 VEE 4 N.C. 5 SHDN1 6 N.C. 7
14 VCC 13 OUT2 12 IN2-
OUT1 1 IN1- 2 IN1+ 3 VCC 4 IN2+ 5 IN2- 6 OUT2 7
14 OUT4 13 IN412 IN4+
MAX4133
11 IN2+ 10 N.C. 9 8 SHDN2 N.C.
MAX4134
11 VEE 10 IN3+ 9 8 IN3OUT3
SO
SO
______________________________________________________________________________________
13
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
_Ordering Information (continued)
PART MAX4132ESA MAX4132EUA MAX4133C/D MAX4133ESD MAX4134ESD TEMP. RANGE -40C to +85C -40C to +85C 0C to +70C -40C to +85C -40C to +85C PINPACKAGE 8 SO 8 MAX Dice* 14 SO 14 SO SOT TOP MARK -- -- -- -- --
___________________Chip Information
MAX4130 TRANSISTOR COUNT: 170 MAX4132 TRANSISTOR COUNT: 340 MAX4134 TRANSISTOR COUNT: 680
*Dice are specified at TA = +25C, DC parameters only.
__________________________________________________________Chip Topographies
MAX4131
OUT1 V EE ININ1SHDN iN+
MAX4133
V CC OUT2
0.055" (1.397mm) IN1+
0.066" (1.676mm) IN2-
V EE V EE V CC
IN2+
OUT 0.036" (0.914mm) V CC SHDN1 SHDN2 0.053" (1.346mm) V EE V CC
TRANSISTOR COUNT: 170 SUBSTRATE CONNECTED TO VEE
TRANSISTOR COUNT: 340 SUBSTRATE CONNECTED TO VEE
14
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps
________________________________________________________Package Information
b e
DIM A A1 A2 b C D E E1 L e e1 MILLIMETERS MIN MAX 0.90 1.45 0.00 0.15 0.90 1.30 0.35 0.50 0.08 0.20 2.80 3.00 2.60 3.00 1.50 1.75 0.35 0.55 0.95ref 1.90ref 0 10
21-0057B
MAX4130-MAX4134
E
e1 D
E1
A A2
C
L A1
5-PIN SOT23-5 SMALL-OUTLINE TRANSISTOR PACKAGE
DIM
C A 0.101mm 0.004 in B A1 L
e
A A1 B C D E e H L
INCHES MAX MIN 0.044 0.036 0.008 0.004 0.014 0.010 0.007 0.005 0.120 0.116 0.120 0.116 0.0256 0.198 0.188 0.026 0.016 6 0
MILLIMETERS MIN MAX 0.91 1.11 0.10 0.20 0.25 0.36 0.13 0.18 2.95 3.05 2.95 3.05 0.65 4.78 5.03 0.41 0.66 0 6
21-0036D
E
H
8-PIN MAX MICROMAX SMALL-OUTLINE PACKAGE
D
______________________________________________________________________________________
15
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130-MAX4134
___________________________________________Package Information (continued)
DIM INCHES MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.157 0.150 0.050 0.244 0.228 0.050 0.016 MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 3.80 4.00 1.27 5.80 6.20 0.40 1.27
D A e B
0.101mm 0.004in.
0-8
A1
C
L
A A1 B C E e H L
E
H
Narrow SO SMALL-OUTLINE PACKAGE (0.150 in.)
DIM PINS D D D 8 14 16
INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.197 4.80 5.00 0.337 0.344 8.55 8.75 0.386 0.394 9.80 10.00
21-0041A
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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