General Description
The MAX4400–MAX4403 low-cost, general-purpose op
amps offer rail-to-rail outputs, draw only 320µA of quies-
cent current, and operate from a single +2.5V to +5.5V
supply. For additional power conservation, the MAX4401
offers a low-power shutdown mode that reduces supply
current to 1µA (max) and puts the amplifier’s output in
a high-impedance state. These devices deliver ±1.4mA
of output current and are unity-gain stable with a 1MHz
gain-bandwidth product driving capacitive loads up to
400pF. The MAX4400–MAX4403 are specified to +125°C,
making them suitable for use in a variety of harsh environ-
ments, such as automotive applications.
The MAX4400 single amplifier is available in ultra-small
5-pin SC70 and space-saving 5-pin SOT23 packages.
The single MAX4401 includes the shutdown feature and
is available in a 6-pin SC70. The MAX4402 is a dual
amplifier available in 8-pin SOT23, µMAX®, and SO
packages. The MAX4403 quad amplifier is packaged in a
14-pin TSSOP or SO.
Applications
Single-Supply, Zero-Crossing Detectors
Instruments and Terminals
Portable Communications
Electronic Ignition Modules
Infrared Receivers
Sensor Signal Detection
Features
Single +2.5V to +5.5V Supply Voltage Range
320µA Quiescent Current per Amplifier
1µA (max) Shutdown Mode (MAX4401)
Available in Space-Saving Packages
5-Pin SC70 (MAX4400)
6-Pin SC70 (MAX4401)
8-Pin SOT23/µMAX (MAX4402)
110dB AVOL with 2k Load
0.015% THD with 2k Load
Rail-to-Rail Output Voltage Swing
1.4mA of Sink and Source Load Current
Unity-Gain Stable up to CLOAD = 400pF
Ground-Sensing Inputs
Pin Configurations continued at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
T = Tape and reel.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX4400AXK+T -40°C to +125°C 5 SC70 AAG
MAX4400AUK+T -40°C to +125°C 5 SOT23 ADNP
MAX4401AXT+T -40°C to +125°C 6 SC70 AAB
MAX4402AKA+T -40°C to +125°C 8 SOT23 AADI
MAX4402AKA/V+T -40°C to +125°C 8 SOT23 AETR
MAX4402AUA+ -40°C to +125°C 8 µMAX
MAX4402AUA/V+T -40°C to +125°C 8 µMAX
MAX4402ASA+ -40°C to +125°C 8 SO
MAX4403AUD+ -40°C to +125°C 14 TSSOP
MAX4403ASD+ -40°C to +125°C 14 SO
PART NO. OF AMPLIFIERS
PER PACKAGE
SHUTDOWN
MODE
MAX4400 1 No
MAX4401 1 Yes
MAX4402 2 No
MAX4403 4 No
IN+
IN-
1
2
3
5
4OUT
VSS
VDD IN+
IN-
1
+ +
2
3
6
5
4OUT
SHDN
VSS
VDD
MAX4400 MAX4401
SC70-5/SOT23-5 SC70-6
MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
19-1599; Rev 5; 6/14
Pin Congurations
Ordering Information
Selector Guide
Power-Supply Voltage (VDD to VSS) ....................... -0.3V to +6V
All Other Pins ................................ (VSS - 0.3V) to (VDD + 0.3V)
Output Short-Circuit Duration
OUT Shorted to VSS or VDD ................................ Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C) ............ 200mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW
6-Pin SC70 (derate 2.27mW/°C above +70°C) ...........181mW
8-Pin SOT23 (derate 7.52mW/°C above +70°C) ........602mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ........... 362mW
8-Pin SO (derate 5.88mW/°C above +70°C) .............. 471mW
14-Pin TSSOP (derate 8.33mW/°C above +70°C) ..... 667mW
14-Pin SO (derate 8.33mW/°C above +70°C) ............ 667mW
Operating Temperature Range ......................... -40°C to +125°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) ....................................... +260°C
(VDD = +5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = connected to VDD/2, SHDN = VDD (MAX4401 only), TA = +25°C, unless
otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
DD
Inferred from PSRR test 2.5 55 V
Supply Current per Amplier IDD
V
DD
= 2.5V
320 µA
VDD = 5.0V
410 700
Supply Current in Shutdown
ISHDN
SHDN = V
SS
(Note 1) 0.00002 1 µA
Input Offset Voltage V
OS
MAX4400/MAX4401
±0.8 ±4.5 mV
MAX4402/MAX4403
±1.0 ±5.5
Input Bias Current I
B
(Note 2) ±0.1 ±100 pA
Input Offset Current IOS (Note 2) ±0.1 ±100 pA
Input Resistance RIN Differential or common mode 1000 G
Ω
Input Common-Mode Voltage
Range
VCM Inferred from CMRR test VSS VDD - 1.4 V
Common-Mode Rejection Ratio CMRR V
SS
≤ V
CM
≤ V
DD
- 1.4V
68 84
dB
Power-Supply Rejection Ratio PSRR 2.5V
VDD
5.5V
78 100
dB
Large-Signal Voltage Gain AVOL
VSS + 0.3V
V
OUT
≤ V
DD
- 0.3V
R
L
= 100kΩ 120
dB
R
L
= 2kΩ 90 110
Output Voltage High V
OH
Specified as
|VDD - VOH|
RL = 100k
Ω
3
mV
RL = 2k
Ω
55 200
Output Voltage Low V
OL
Specified as
|VSS - VOL|
RL = 100k
Ω
2
mV
R
L
= 2kΩ
30 75
Output Short-Circuit Current Sourcing
12
mA
Sinking
30
Shutdown Mode Output Leakage
IOUTSHDN
Device in shutdown mode, SHDN = SS,
VSS < VOUT < VCC (Note 1) ±1.0 µA
SHDN Logic Low V
IL
(Note 1)
0.3
×
VDD
V
SHDN Logic High
V
IH
(Note 1)
0.7 × VDD
V
SHDN Input Current
I
IL
, I
IH SHDN = VDD or VSS (Note 1) ±0.001 ±500
nA
Gain-Bandwidth Product
GBW
800
kHz
Phase Margin
fM
70 degrees
Gain Margin
20
dB
Slew Rate SR
1
V/µs
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Electrical Characteristics
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.
Absolute Maximum Ratings
Note 1: Shutdown mode is only available in the 6-pin SC70 single op amp (MAX4401).
Note 2: Guaranteed by design.
Note 3: Specifications are 100% tested at TA = +25°C (exceptions noted). All temperature limits are guaranteed by design.
(VDD = +5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = ∞ connected to VDD/2, TA = -40°C to +125°C, unless otherwise noted.) (Note 3)
(VDD = +5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = connected to VDD/2, SHDN = VDD (MAX4401 only), TA = +25°C, unless
otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VDD Inferred by PSRR test 2.5 5.5 V
Supply Current per Amplier IDD 800 µA
MAX4400/MAX4401 ±6.5
Input Offset Voltage VOS MAX4402/MAX4403 ±8.0 mV
Input Offset Voltage Drift TCVOS ±1 μV/°C
Input Bias Current IB(Note 2) ±100 pA
Input Offset Current IOS (Note 2) ±100 pA
Input Common-Mode Voltage
Range VCM Inferred from CMRR test VSS VDD - 1.5 V
Common-Mode Rejection Ratio CMRR VSS ≤ VCM ≤ VDD - 1.5V 65 dB
VSS ≤ VCM ≤ VDD - 1.0V TA = -20°C to +125°C 50
Power-Supply Rejection Ratio PSRR 2.5V ≤ VCC ≤ 5.5V 74 dB
Shutdown Mode Output
Leakage IOUTSHDN
Device in shutdown
mode, SHDN = VSS,
VSS < VOUT < VDD
(Note 1)
TA = -40°C to +85°C ±1.0
μA
TA = +85°C to +125°C ±5.0
SHDN Logic Low VIL (Note 1) 0.3 × VDD V
SHDN Logic High VIH (Note 1) 0.7 × VDD V
SHDN Input Current IIL, IIH SHDN = VDD or VSS (Notes 1, 2) ±1000 nA
Large-Signal Voltage Gain AVOL VSS + 0.3V ≤ VOUT ≤ VDD - 0.3V, RL = 2kΩ 85 dB
Output Voltage High VOH Specied as |VDD - VOH|, RL = 2kΩ 250 mV
Output Voltage Low VOL Specied as |VSS - VOL|, RL = 2kΩ 100 mV
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage-Noise Density e
nf = 10kHz 36
nV/√Hz
Input Current-Noise Density i
nf = 10kHz 1
fA/√Hz
Capacitive-Load Stability
CLOAD AV = +1V/V 400
pF
Shutdown Delay Time
tSHDN AV = +1V/V 0.4
μs
Enable Delay Time
tEN (Note 1) 6
μs
Power-On Time
tON 5
μs
Input Capacitance
CIN 2.5
pF
Total Harmonic Distortion THD
f = 10kHz, VOUT =
2VP-P, AV = +1V/V
RL = 100k
Ω
0.009 %
RL = 2k
Ω
0.015
Settling Time to 0.1%
tSVOUT = 2V step 7
μs
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Electrical Characteristics
Electrical Characteristics (continued)
(VDD = +5V, VSS = 0V, VCM = VDD/2, VSHDN = 5V, RL = ∞ connected to VDD/2, TA = +25°C, unless otherwise noted.)
30
20
10
0
50
40
70
60
-40 0 40 80-20 20 60 100 120
OUTPUT VOLTAGE SWING HIGH
vs. TEMPERATURE
MAX4400 toc09
TEMPERATURE (°C)
VDD - VOH (mV)
RL = 2k to VDD/2
-1500
-1000
-500
500
0
1000
1500
-40 0 40 80-20 20 60 100 120
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4400 toc08
TEMPERATURE (°C)
VOS (µV)
0.1
10
1k
1M
-40 0 40 80-20 20 60 100 120
MAX4401
OUTPUT LEAKAGE CURRENT
vs. TEMPERATURE
MAX4400 toc07
TEMPERATURE (°C)
ILEAK (pA)
VSHDN = VSS
VOUT = VDD/2
1
10
100
1k
10k
100k
-40 0 40 80-20 20 60 100 120
MAX4401
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX4400 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (pA)
VSHDN = VSS
300
350
400
450
500
-40 0 40 80-20 20 60 100 120
SUPPLY CURRENT
vs. TEMPERATURE
MAX4400 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
10 100 1k 10k 100k 1M
OUTPUT IMPEDANCE
vs. FREQUENCY
FREQUENCY (Hz)
1000
0.001
0.1
MAX4400 toc4
OUTPUT IMPEDANCE ()
10
0.01
1
100
10 1k100 10k 100k 1M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4400 toc03
FREQUENCY (Hz)
PSRR (dB)
10
-110
-90
-10
-30
-50
-70
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
1 10 1k 10M1M
GAIN AND PHASE
vs. FREQUENCY (CL = 400pF)
MAX4400 toc02
FREQUENCY (Hz)
GAIN (dB)/PHASE (degrees)
100 10k 100k
AVCL = +1000V/V
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
1 10 1k 10M1M
GAIN AND PHASE
vs. FREQUENCY (NO LOAD)
MAX4400 toc01
FREQUENCY (Hz)
GAIN (dB)/PHASE (degrees)
100 10k 100k
AVCL = +1000V/V
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4
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Typical Operating Characteristics
(VDD = +5V, VSS = 0V, VCM = VDD/2, VSHDN = 5V, RL = ∞ connected to VDD/2, TA = +25°C, unless otherwise noted.)
0.0001
0.001
0.1
0.01
1
10
0 1.00.5 1.5 2.0 2.5 3.0
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. INPUT AMPLITUDE
MAX4400 toc18
VIN (VP-P)
THD + N (%)
RL = 100k
f = 10kHz
BW = 20kHz
0.0001
0.001
0.1
0.01
1
10
0 1.00.5 1.5 2.0 2.5 3.0
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. INPUT AMPLITUDE
MAX4400 toc17
VIN (VP-P)
THD + N (%)
RL = 2k
f = 10kHz
BW = 20kHz
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4400 toc16
FREQUENCY (Hz)
THD (%)
0.01
0.0001
0.001
RL = 100k
VOUT = 2VP-P
AV = +1
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4400 toc15
FREQUENCY (Hz)
THD (%)
0.1
0.01
0.0001
0.001
RL = 2k
VOUT = 2VP-P
AV = +1
1.0
1.5
2.0
2.5
3.0
-40 0 40 80-20 20 60 100 120
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
MAX4400 toc14
TEMPERATURE (°C)
VMIN (V)
100
115
110
105
120
130
125
140
135
-40 0 40 80-20 20 60 100 120
LARGE-SIGNAL GAIN
vs. TEMPERATURE
MAX4400 toc13
TEMPERATURE (°C)
GAIN (dB)
RL = 2k
0
40
80
60
20
100
120
140
0.5 1.5 2.5 3.51.0 2.0 3.0 4.0 4.5
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
MAX4400 toc12
VOUT (V)
GAIN (dB)
RL = 2k
-100
-90
-80
-70
-60
-40 0 40 80-20 20 60 100 120
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
MAX4400 toc11
TEMPERATURE (°C)
CMRR (dB)
0
10
20
30
40
50
-40 0 40 80-20 20 60 100 120
OUTPUT VOLTAGE SWING LOW
vs. TEMPERATURE
MAX4400 toc10
TEMPERATURE (°C)
VOL - VEE (mV)
RL = 2k to VDD/2
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Typical Operating Characteristics (continued)
(VDD = +5V, VSS = 0V, VCM = VDD/2, VSHDN = 5V, RL = ∞ connected to VDD/2, TA = +25°C, unless otherwise noted.)
MAX4402/MAX4403
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
MAX4400 toc25
130
50
0.01 1100 1000
60
FREQUENCY (kHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
80
70
100
110
90
120
0.1 10
0
100
50
250
200
150
400
350
300
450
0 21 3 4 5 6
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4400 toc24
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
VOUT = VDD/2
0
10
5
20
15
25
30
0 200 300100 400 500 600
PERCENT OVERSHOOT
vs. CAPACITIVE LOAD
MAX4400 toc22
CLOAD (pF)
OVERSHOOT (%)
NEGATIVE OVERSHOOT
POSITIVE OVERSHOOT
10µs/div
IN
2V/div
OUT
NONINVERTING LARGE-SIGNAL
TRANSIENT RESPONSE
MAX4400 toc21
AV = +1V/V
RL = 2k
2µs/div
IN
50mV/div
OUT
NONINVERTING SMALL-SIGNAL
TRANSIENT RESPONSE
MAX4400 toc20
AV = +1V/V
RL = 2k
CAPACITIVE-LOAD STABILITY
2000
0
1k 10k 100k
500
MAX4400 toc19
RESISTIVE LOAD (
)
CAPACITIVE LOAD (pF)
1000
1500
AV = +1
TA = +25°C
UNSTABLE
REGION
STABLE
REGION
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Typical Operating Characteristics (continued)
Detailed Description
Rail-to-Rail Output Stage
The MAX4400–MAX4403 can drive a 2k load and still
typically swing within 55mV of the supply rails. Figure 1
shows the output voltage swing of the MAX4400 config-
ured with AV = +10V/V.
Driving Capacitive Loads
Driving a capacitive load can cause instability in many op
amps, especially those with low quiescent current. The
MAX4400–MAX4403 are unity-gain stable for a range
of capacitive loads to above 400pF. Figure 2 shows the
response of the MAX4400 with an excessive capacitive
load. Adding a series resistor between the output and the
load capacitor (Figure 3) improves the circuit’s response
by isolating the load capacitance from the op amp’s output.
Figure 1. Rail-to-Rail Output Operation
PIN
NAME FUNCTION
MAX4400 MAX4401 MAX4402 MAX4403
1 1 IN+ Noninverting Amplier Input
3 3 INA+ Noninverting Amplier Input A
5 5 INB+
Noninverting Amplier Input B
10 INC+
Noninverting Amplier Input C
12 IND+ Noninverting Amplier Input D
2 2 4 11 VSS
Negative Supply. Connect to ground for single- supply
operation.
3 3 IN- Inverting Amplier Input
2 2 INA-
Inverting Amplier Input A
6 6 INB- Inverting Amplier Input B
9 INC- Inverting Amplier Input C
13 IND-
Inverting Amplier Input D
4 4 OUT Amplier Output
1 1 OUTA Amplier Output A
7 7 OUTB
Amplier Output B
8 OUTC Amplier Output C
14 OUTD Amplier Output D
5 6 8 4 V
DD Positive Supply
5 SHDN Active-Low Shutdown Input. Connect to VDD for normal
operation. Do not leave unconnected.
1V/div
100µs/div
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Pin Description
Applications Information
Shutdown Mode
The MAX4401 features a low-power shutdown mode.
When SHDN goes low, the supply current drops to 20pA
(typ) and the output enters a high-impedance state. Pull
SHDN high to enable the amplifier. Do not leave SHDN
unconnected. Figure 4 shows the shutdown waveform.
Power-Up
The MAX4400–MAX4403 outputs typically settle within
5µs after power-up. Figure 5 shows the output voltage on
power-up and power-down.
Power Supplies and Layout
The MAX4400–MAX4403 operate from a single +2.5V
to +5.5V power supply. Bypass the power supply with a
0.1µF capacitor to ground.
Good layout techniques optimize performance by
decreasing the amount of stray capacitance at the op
amp’s inputs and outputs. To decrease stray capacitance,
minimize trace lengths by placing external components
close to the op amp’s pins.
Figure 5. Power-Up/Power-Down WaveformFigure 4. Shutdown Waveform
Figure 3. Capacitive-Load-Driving CircuitFigure 2. Small-Signal Transient Response with Excessive
Capacitive Load
10µs/div
OUT
1V/div
VDD
2V/div
RL = 10M TO GND
CL = 25pF
400µs/div
SHDN
2V/div
OUT
RISO
CL
MAX4400
MAX4401
MAX4402
MAX4403
2µs/div
IN
50mV/div
OUT
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
5 SC70 X5+1 21-0076 90-0188
5 SOT23 U5+1 21-0057 90-0174
6 SC70 X6SN+1 21-0077 90-0189
8 SOT23 K8+5 21-0078 90-0176
8 μMAX U8+1 21-0036 90-0092
8 SO S8+2 21-0041 90-0096
14 TSSOP U14+1 21-0066 90-0113
14 SO S14+1 21-0041 90-0112
6
SOT23-8/SO/µMAX
TSSOP/SO
VSS
OUTA
INA+
1+
+
2
3
4
8
INB-
5INB+
7OUTB
INA-
VDD
OUTA
INA+
INB+
OUTB
INB-
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IND+
INC+
INC-
OUTC
IND-
OUTD
INA-
VDD VSS
MAX4403
MAX4402
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MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Pin Congurations (continued)
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 1/00 Initial Release
1 11/00 Release of MAX4402. 1, 2, 9
2 7/00 Release of MAX4403. 1, 6, 7
3 9/01 Added µMAX package to data sheet. 1, 2, 9
4 7/12 Added automotive package for MAX4402 to data sheet. 1
5 6/14 Added MAX4402AKA/V+T automotive package to data sheet. 1
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2014 Maxim Integrated Products, Inc.
10
MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Revision History
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