MAXIM MAX4129

19-1087; Rev 1; 8/97
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
________________________Applications
Features
♦ 5-Pin SOT23 Package (MAX4122/4)
♦ +2.7V to +6.5V Single-Supply Operation
♦ Rail-to-Rail Input Common-Mode Voltage Range
♦ Rail-to-Rail Output Voltage Swing
♦ 5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9)
25MHz Gain-Bandwidth Product (MAX4124/5/8)
♦ 650µA Quiescent Current per Amplifier
♦ 25µA Shutdown Function (MAX4123/5/7)
♦ 200µV Offset Voltage
♦ No Phase Reversal for Overdriven Inputs
♦ Drive 250Ω Loads
♦ Stable with 500pF Capacitive Loads
♦ Unity-Gain Stable (MAX4122/3/6/7/9)
Stable at Gains ≥ 10V/V (MAX4124/5/8)
Ordering Information
PART
TEMP. RANGE
MAX4122EUK -40°C to +85°C
PINPACKAGE
5 SOT23-5
MARKING
INFO.
AAAZ
Data-Acquisition Systems
Signal Conditioning
MAX4123C/D
—
0°C to +70°C Dice*
—
MAX4123ESA -40°C to +85°C 8 SO
MAX4123EUA -40°C to +85°C 8 µMAX
—
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
Low-Power, Low-Voltage Applications
Pin Configurations appear at end of data sheet.
Battery-Powered Instruments
Portable Equipment
Selection Table
PART
BW
(MHz)
AMPS
PER
PKG.
SHUTDOWN
MODE
PINPACKAGE
MAX4122
5
1
—
5 SOT23-5
MAX4123
5
1
Yes
8 SO/µMAX
MAX4124
25
MAX4125
25
1
—
5 SOT23-5
1
Yes
8 SO/µMAX
MAX4126
5
2
—
8 SO/µMAX
MAX4127
5
2
Yes
MAX4128
25
2
—
8 SO/µMAX
MAX4129
5
4
—
14 SO
14 SO
__________Typical Operating Circuit
+5V
MAX187
3
6
SERIAL
INTERFACE
8
7
SHDN
VDD
DOUT
AIN
SCLK
VREF
CS
GND
1
2
MAX4123
4
5
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX4122–MAX4129
General Description
The MAX4122–MAX4129 family of operational amplifiers
combines wide bandwidth and excellent DC accuracy with
Rail-to-Rail® operation at the inputs and outputs. These
devices require only 650µA per amplifier, and operate from
either a single supply (+2.7V to +6.5V) or dual supplies
(±1.35V to ±3.25V) with a common-mode voltage range
that extends 250mV beyond VEE and VCC. They are capable of driving 250Ω loads. The MAX4122/MAX4123/
MAX4126/MAX4127/MAX4129 have a 5MHz gain bandwidth product, while the decompensated MAX4124/
MAX4125/MAX4128 (stable at closed-looped gains of
10 or greater) have a 25MHz gain bandwidth product. In
addition, the MAX4123/MAX4125/MAX4127 feature a
shutdown mode in which the outputs are placed in a
high-impedance state and the supply current is reduced
to only 25µA per amplifier.
With their rail-to-rail input common-mode range and
output swing, these amplifiers are ideal for low-voltage
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 signal-conditioning stages for precision, low-voltage, data-acquisition
systems. The MAX4122 and MAX4124 come in the
space-saving 5-pin SOT23-5 package.
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
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 = +70°C)
5-pin SOT23-5 (derate 7.1mW/°C above +70°C) .........571mW
8-pin SO (derate 5.88mW/°C above +70°C).................471mW
8-pin µMAX (derate 4.10mW/°C above +70°C) ............330mW
14-pin SO (derate 8.00mW/°C above +70°C)...............640mW
Operating Temperature Range
MAX412_E__ ....................................................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
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, V EE = 0V, V CM = 0V, V OUT = V CC/2, R L tied to V CC/2, SHDN ≥ 2V (or open), T A = +25°C, unless
otherwise noted.)
PARAMETER
Input Offset Voltage
CONDITIONS
VCM =
VEE to VCC
MIN
TYP
MAX
MAX4123ESA/MAX4125ESA
±0.20
±0.60
MAX4122EUK/MAX4124EUK
±0.35
±1.50
MAX4123EUA/MAX4125EUA
±0.35
±1.20
MAX4126ESA/MAX4127ESD/MAX4128ESA
±0.25
±0.75
MAX4126EUA/MAX4128EUA
±0.40
±1.50
MAX4129ESD
±0.35
±1.50
±50
±150
±12
Input Bias Current
VCM = VEE to VCC
Input Offset Current
VCM = VEE to VCC
±1
Differential Input Resistance
-1.5V < VDIFF < 1.5V
500
Common-Mode Input
Voltage Range
Common-Mode Rejection Ratio
VEE 0.25
(VEE 0.25) <
VCM <
(VCC +
0.25V)
VCC +
0.25
V
98
67
90
MAX4123EUA/MAX4125EUA
68
88
MAX4126ESA/MAX4127ESD/MAX4128ESA
74
94
MAX4126EUA/MAX4128EUA
66
86
MAX4129ESD
64
84
78
100
dB
0.1
Ω
AV = 1
Off-Leakage Current
SHDN < 0.8V, VOUT = 0V to VCC
2
nA
kΩ
78
Output Resistance
VCC = 5V
nA
MAX4122EUK/MAX4124EUK
VCC = 2.7V to 6.5V
VCC = 2.7V
mV
MAX4123ESA/MAX4125ESA
Power-Supply Rejection Ratio
Large-Signal Voltage Gain
UNITS
±0.1
VOUT = 0.25V to 2.45V, RL = 100kΩ
92
104
VOUT = 0.4V to 2.3V, RL = 250Ω
72
80
VOUT = 0.25V to 4.75V, RL = 100kΩ
94
106
VOUT = 0.4V to 4.6V, RL = 250Ω
75
84
_______________________________________________________________________________________
dB
±1
µA
dB
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
(VCC = +2.7V to +6.5V, V EE = 0V, V CM = 0V, V OUT = V CC/2, R L tied to V CC/2, SHDN ≥ 2V (or open), T A = +25°C, unless
otherwise noted.)
PARAMETER
CONDITIONS
MAX4122/
MAX4123/
MAX4124/
MAX4125
RL = 100kΩ
MAX4126/
MAX4127/
MAX4128/
MAX4129
RL = 100kΩ
RL = 250Ω
Output Voltage Swing
RL = 250Ω
MIN
VCC - VOH
TYP
MAX
12
20
VOL - VEE
20
35
VCC - VOH
240
290
VOL - VEE
125
170
VCC - VOH
15
30
VOL - VEE
25
40
VCC - VOH
280
330
VOL - VEE
180
230
Output Short-Circuit Current
50
SHDN Logic Threshold
MAX4123/MAX4125/MAX4127
SHDN Input Current
MAX4123/MAX4125/MAX4127
Low
High
2.0
2.7
Supply Current per Amplifier
VCM = VOUT = VCC/2
Shutdown Supply Current
per Amplifier
SHDN > 0.8V,
MAX4123/MAX4125/MAX4127
mV
mA
0.8
±1
Operating Supply-Voltage Range
UNITS
V
±3
µA
6.5
V
VCC = 2.7V
650
750
VCC = 5V
725
825
VCC = 2.7V
25
40
VCC = 5V
40
60
µA
µA
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 = -40°C to +85°C, unless
otherwise noted.)
PARAMETER
Input Offset Voltage
CONDITIONS
VCM =
VEE to VCC
MIN
TYP
MAX
MAX4123ESA/MAX4125ESA
±0.75
MAX4122EUK/MAX4124EUK
±3.50
MAX4123EUA/MAX4125EUA
±4.40
MAX4126ESA/MAX4127ESD/MAX4128ESA
±0.95
MAX4126EUA/MAX4128EUA
±4.70
MAX4129ESD
±4.00
Input Offset Voltage Tempco
±2
UNITS
mV
µV/°C
Input Bias Current
VCM = VEE to VCC
±160
nA
Input Offset Current
VCM = VEE to VCC
±18
nA
VCC +
0.20
V
Common-Mode Input
Voltage Range
Common-Mode Rejection Ratio
VEE 0.20
(VEE 0.2V) <
VCM <
(VCC +
0.2V)
MAX4123ESA/MAX4125ESA
76
MAX4122EUK/MAX4124EUK
62
MAX4123EUA/MAX4125EUA
60
MAX4126ESA/MAX4127ESD/MAX4128ESA
74
MAX4126EUA/MAX4128EUA
58
MAX4129ESD
60
dB
_______________________________________________________________________________________
3
MAX4122–MAX4129
DC ELECTRICAL CHARACTERISTICS (continued)
MAX4122–MAX4129
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 = -40°C to +85°C, unless
otherwise noted.)
PARAMETER
CONDITIONS
Power-Supply Rejection Ratio
VCC = 2.7V to 6.5V
Off-Leakage Current
SHDN < 0.8V, VOUT = 0V to VCC
VCC = 2.7V
Large-Signal Voltage Gain
VCC = 5V
MAX4122/
MAX4123/
MAX4124/
MAX4125
TYP
MAX
74
84
VOUT = 0.4V to 2.3V, RL = 250Ω
66
VOUT = 0.25V to 4.75V, RL = 100kΩ
86
VOUT = 0.4V to 4.6V, RL = 250Ω
68
RL = 100kΩ
RL = 250Ω
RL = 100kΩ
RL = 250Ω
SHDN Logic Threshold
MAX4123/MAX4125/MAX4127
SHDN Input Current
MAX4123/MAX4125/MAX4127
25
VCC - VOH
40
VCC - VOH
300
VOL - VEE
190
VCC - VOH
35
VOL - VEE
50
VCC - VOH
350
VOL - VEE
250
Low
0.8
Operating Supply-Voltage Range
2.0
2.7
Supply Current per Amplifier
VCM = VOUT = VCC/2
Shutdown Supply Current
per Amplifier
SHDN < 0.8V,
MAX4123/MAX4125/MAX4127
µA
dB
VOL - VEE
High
UNITS
dB
±12
VOUT = 0.25V to 2.45V, RL = 100kΩ
Output Voltage Swing
MAX4126/
MAX4127/
MAX4128/
MAX4129
MIN
mV
V
±3
µA
6.5
V
VCC = 2.7V
775
VCC = 5V
850
VCC = 2.7V
50
VCC = 5V
70
µA
µA
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.)
PARAMETER
Gain-Bandwidth Product
Phase Margin
Gain Margin
Total Harmonic Distortion
Slew Rate
Settling Time to 0.01%
Turn-On Time
4
CONDITIONS
MIN
TYP
MAX4122/23/26/27/29
5
MAX4124/25/28 (AV ≥ 10)
25
MAX4122/23/26/27/29
64
MAX4124/25/28 (AV ≥ 10)
60
MAX4122/23/26/27/29
12
MAX4124/25/28 (AV ≥ 10)
10
f = 10kHz, VOUT = 2Vp-p,
MAX4122/23/26/27/29 (AV = 1)
0.003
MAX4122/23/26/27/29
2
MAX4124/25/28 (AV ≥ 10)
10
MAX4122/23/26/27/29 (AV = 1), VOUT = 2V step
2.0
MAX4124/25/28 (AV ≥ 10), VOUT = 2V step
1.3
VCC = 0V to 3V step, VOUT = VCC/2
1
_______________________________________________________________________________________
MAX
UNITS
MHz
degrees
dB
%
V/µs
µs
µs
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
(VCC = +2.7V to +6.5V, VEE = 0V, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
VCC = 3V, VOUT = VCC/2,
MAX4123/25/27
SHDN Delay
MIN
TYP
Enable
1
Disable
0.2
Input Capacitance
MAX
UNITS
µs
3
pF
Input Noise Voltage Density
f = 1kHz
22
nV/√Hz
Input Noise Current Density
f = 1kHz
0.4
pA/√Hz
Amp-Amp Isolation
MAX4126/27/28/29
135
dB
MAX4122/23/26/27/29 (AV = 1)
500
MAX4124/25/28 (AV ≥ 10)
500
Capacitive Load Stability
pF
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.)
MAX4122/23/26/27/29
GAIN AND PHASE vs. FREQUENCY
(WITH CLOAD)
180
MAX4122/29-02
60
144
20
36
0
-36
PHASE
20
36
0
0
-108
-36
PHASE
-72
-20
72
-20
1k
10k
100k
1M
10M
1k
10k
1M
10M
MAX4124/25/28
GAIN AND PHASE vs. FREQUENCY
MAX14122/29-04
GAIN
180
60
MAX4124/25/28
GAIN AND PHASE vs. FREQUENCY
(WITH CLOAD)
MAX4122/29-05
20
36
0
PHASE
-36
40
GAIN (dB)
GAIN (dB)
72
0
AV = +1000
RL = ∞
CL = 500 pF
GAIN
20
-108
-20
-40
1k
10k
100k
FREQUENCY (Hz)
1M
10M
72
-36
-72
-20
1M
10M
100M
-20
-40
-60
-80
-108
-144
-144
-180
-180
100M
-40
100
100k
AV = +10
0
108
0
PHASE
0
10k
180
36
-72
100
1k
MAX4124/25/28
POWER-SUPPLY REJECTION
vs. FREQUENCY
144
108
PHASE (DEGREES)
AV = +1000
NO LOAD
100
FREQUENCY (Hz)
144
40
10
FREQUENCY (Hz)
FREQUENCY (Hz)
60
100k
-100
-180
100M
MAX4122/29-06
100
-40
100
-60
-80
-108
-144
-180
100M
-40
-72
-144
-40
-20
PSR (dB)
0
108
GAIN
PSR (dB)
72
GAIN (dB)
108
GAIN
PHASE (DEGREES)
GAIN (dB)
40
AV = +1000
RL = ∞
CL = 500pF
AV = +1
0
144
40
PHASE (DEGREES)
AV = +1000
NO LOAD
180
PHASE (DEGREES)
MAX4322/26/29-01
60
MAX4122/23/26/27/29
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX4122/29-03
MAX4322/26/29
GAIN AND PHASE vs. FREQUENCY
1k
10k
100k
1M
FREQUENCY (Hz)
10M
-100
10
100
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
_______________________________________________________________________________________
5
MAX4122–MAX4129
AC ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.)
100
90
80
70
10
1
MAX4122/29-09
AV = +10
OUTPUT IMPEDANCE (Ω)
110
100
MAX4122/29-08
AV = +1
OUTPUT IMPEDANCE (Ω)
120
CHANNEL SEPARATION (dB)
100
MAX4122/29-07
130
MAX4124/25/28
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4122/23/26/27/29
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4126/27/28/29
CHANNEL SEPARATION vs. FREQUENCY
10
1
0.1
60
1M
10M
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
800
VCC = 6.5V
750
700
VCC = 2.7V
650
600
550
1M
10M
100
100M
5
20
35
50
65
80
100k
1M
10M
MAX4323/MAX4327
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
OUTPUT LEAKAGE CURRENT
vs. TEMPERATURE
50
VCC = 6.5V
40
30
VCC = 2.7V
20
20
15
10
10
AV = +1
SHDN = 0V
VCC = 6.5V
VOUT SHORT
TO VEE
VCC = 2.7V
0
VCC = 6.5V
VOUT SHORT
TO VCC
VCC = 2.7V
-10
5
20
35
50
65
80
95
-40 -25 -10
5
20
35
50
65
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT BIAS CURRENT (nA)
40
1.50
0.75
0
-0.75
-1.50
VCC = 2.7V
30
VCC = 6.5V
20
10
0
-10
-20
40
20
0
-20
-50
-3.00
-50
-60
20
35
50
65
80
95
0
1
2
3
4
5
COMMON-MODE VOLTAGE (V)
6
VCC = 2.7V, VCM = VEE
-30
-40
5
VCC = 2.7V, VCM = VCC
-10
-40
TEMPERATURE (°C)
95
10
-30
-40 -25 -10
VCC = 6.5V, VCM = VCC
30
-2.25
SO PACKAGE
80
50
INPUT BIAS CURRENT (nA)
SOT23-5
PACKAGE
2.25
50
MAX4122/29-13
3.00
100M
5
-5
-40 -25 -10
95
10k
FREQUENCY (Hz)
SHDN = 0V
-40 -25 -10
1k
FREQUENCY (Hz)
0
500
6
100k
MAX4122/29-14
SUPPLY CURRENT (µA)
850
10k
60
SHUTDOWN SUPPLY CURRENT (mA)
MAX4122/29-10
900
0.1
1k
MAX4122/29-15
10k
100k
FREQUENCY (Hz)
LEAKAGE CURRENT (µA)
1k
MAX4322-11
100
MAX4122/29-12
0.01
100
50
VOLTAGE (mV)
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
VCC = 6.5V, VCM = VEE
-40 -25 -10
5
20
35
50
TEMPERATURE (°C)
_______________________________________________________________________________________
65
80
95
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
MINIMUM OUTPUT VOLTAGE
vs. TEMPERATURE
105
100
VCC = 6.5V, RL = 500Ω
150
VCC = 2.7V, RL = 500Ω
100
VCM = 0.2V TO 5.2V
VCC = 6.5V, RL = 100kΩ
50
35
50
80
-40 -25 -10
95
5
20
35
50
65
0
80
95
-40 -25 -10
65
LARGE-SIGNAL GAIN
vs. TEMPERATURE
120
VCC = 6.5V
RL TO VEE
110
125
MAX4122/29-20
RL = 100kΩ
100
120
RL = 500Ω
RL = 2kΩ
80
70
60
60
100
95
VCC = 6.5V, RL TO VCC
85
80
100
200
300
400
500
VCC = 2.7V, RL TO VCC
75
0
600
100
200
300
400
500
600
-40 -25 -10
5
20
35
50
65
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
TEMPERATURE (°C)
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
LARGE-SIGNAL GAIN
vs. TEMPERATURE
VCC = 6.5V
RL TO VCC
110
RL = 100kΩ
RL = 10kΩ
RL = 10kΩ
100
RL = 2kΩ
90
RL = 500Ω
80
90
RL = 500Ω
105
100
300
400
500
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
600
VCC = 2.7V, RL TO VCC
90
85
60
200
VCC = 2.7V, RL TO VEE
95
80
100
VCC = 6.5V, RL TO VCC
95
110
70
60
VCC = 6.5V, RL TO VEE
115
RL = 2kΩ
80
70
80
120
GAIN (dB)
GAIN (dB)
100
125
MAX4122/29-23
RL = 100kΩ
VCC = 2.7V
RL TO VCC
120
MAX4122/29-22
120
95
VCC = 2.7V,
RL TO VEE
105
90
RL = 500Ω
70
VCC = 6.5V,
RL TO VEE
110
RL = 10kΩ
90
RL = 500Ω
VOUT(p-p) = VCC - 1V
80
115
GAIN (dB)
GAIN (dB)
RL = 2kΩ
80
GAIN (dB)
50
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
90
0
35
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
RL = 10kΩ
110
20
TEMPERATURE (°C)
100
0
5
TEMPERATURE (°C)
RL = 100kΩ
GAIN (dB)
VCC = 6.5V, RL = 100kΩ (TOP)
TEMPERATURE (°C)
VCC = 2.7V
RL TO VEE
110
65
MAX4122/29-19
120
20
VCC = 2.7V, RL = 500Ω
VCC = 2.7V, RL = 100kΩ (BOTTOM)
VCC = 2.7V, RL = 100kΩ
0
80
5
150
50
VCM = 0.3V TO 5.3V
-40 -25 -10
200
100
90
85
VCC = 6.5V, RL = 500Ω
MAX4122/29-21
95
200
VOUT - VEE (mV)
VCM = 0V TO 5.0V
RL TO VEE
250
MAX4122/29-24
110
RL TO VCC
VCC - VOUT (mV)
115
300
MAX4122/29-17
250
MAX4122/29-16
COMMON-MODE REJECTION (dB)
120
MAXIMUM OUTPUT VOLTAGE
vs. TEMPERATURE
MAX4122/29-18
COMMON-MODE REJECTION
vs. TEMPERATURE
VOUT(p-p) = VCC - 600mV
RL = 100kΩ
75
0
100
200
300
400
500
OUTPUT VOLTAGE: EITHER SUPPLY (mV)
600
-40 -25 -10
5
20
35
50
65
80
95
TEMPERATURE (°C)
_______________________________________________________________________________________
7
MAX4122–MAX4129
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.)
1.8
AV = +1
2Vp-p SIGNAL
500kHz LOWPASS FILTER
RL = 10kΩ TO VCC/2
0.035
0.030
1.6
1.5
1.4
0.025
THD + N (%)
THD & NOISE (%)
1.7
0.020
0.015
AV = +1
10kHz SINEWAVE
RL TO VCC/2
500kHz LOWPASS FILTER
0.01
RL = 2kΩ
RL = 250Ω
0.010
RL = 10kΩ
0.005
0.001
0
5
20
35
50
65
80
10
95
100
TEMPERATURE (°C)
MAX4122/23/26/27/29
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
4.0
100k
OUT
4.4
4.6
4.8
MAX4122/23/26/27/29
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
AV = +1
IN
IN
OUT
OUT
MAX4122/23/26/27/29
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
MAX4124/25/28
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
MAX4124/25/28
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
AV = +10
AV = -10
IN
(2V/div)
IN
(5mV/div)
IN
(5mV/div)
OUT
(2V/div)
OUT
(50mV/div)
OUT
(50mV/div)
TIME (2µs/div)
TIME (200ns/div)
MAX4122/29-32
TIME (2µs/div)
MAX4122/29-31
TIME (200ns/div)
MAX4122/29-34
TIME (200ns/div)
AV = -1
5.0
VOLTAGE (2V/div)
VOLTAGE (50mV/div)
IN
AV = -1
4.2
PEAK-TO-PEAK SIGNAL AMPLITUDE (V)
MAX4122/23/26/27/29
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
MAX4122/29-28
AV = +1
1k
10k
FREQUENCY (Hz)
MAX4122/29-29
-40 -25 -10
RL = 100kΩ
MAX4122/29-30
1.3
1.2
8
0.1
MAX4122/29-26
0.040
MAX4122/29-25
MINIMUM OPERATING VOLTAGE (V)
1.9
MAX4123
TOTAL HARMONIC DISTORTION AND NOISE
vs. PEAK-TO-PEAK SIGNAL AMPLITUDE
MAX4122/23/26/27/29 TOTAL HARMONIC
DISTORTION AND NOISE vs. FREQUENCY
MAX4122/29-27
MAX4123
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
VOLTAGE (50mV/div)
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
TIME (200ns/div)
_______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
MAX4122/29-33
AV = +10
MAX4122/29-35
MAX4124/25/28
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
MAX4124/25/28
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
AV = -10
IN
(200mV/div)
IN
(200mV/div)
OUT
(2V/div)
OUT
(2V/div)
TIME (2µs/div)
TIME (2µs/div)
Pin Description
PIN
NAME
FUNCTION
MAX4122
MAX4124
MAX4123
MAX4125
MAX4126
MAX4128
MAX4127
MAX4129
1
6
—
—
—
OUT
Output
2
4
4
4
11
VEE
Negative Supply. Ground for single-supply
operation.
3
3
—
—
—
IN+
Noninverting Input
4
2
—
—
—
IN-
Inverting Input
5
7
8
14
4
VCC
Positive Supply
—
1, 5
—
5, 7, 8, 10
—
N.C.
No Connect
—
8
—
—
—
SHDN
—
—
1, 7
1, 13
1, 7
OUT1, OUT2
—
—
2, 6
2, 12
2, 6
IN1-, IN2-
—
—
3, 5
3, 11
3, 5
IN1+, IN2+
—
—
—
6, 9
—
SHDN1,
SHDN2
—
—
—
—
8, 14
OUT3, OUT4
—
—
—
—
9, 13
IN3-, IN4-
—
—
—
—
10, 12
IN3+, IN4+
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 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
_______________________________________________________________________________________
9
MAX4122–MAX4129
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.)
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
MAX4122–
MAX4129
R3
R3 = R1
R2
R3
R3 = R1
R1
R2
Figure 1a. Reducing Offset Error Due to Bias Current
(Noninverting)
R2
R1
R2
Figure 1b. Reducing Offset Error Due to Bias Current
(Inverting)
1k
1k
Figure 2. Input Protection Circuit
10
MAX4122–
MAX4129
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
Rail-to-Rail Input Stage
IBIAS =
VDIFF - 1.8V
2kΩ
Rail-to-Rail Output Stage
The minimum output voltage will be 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 MAX4123
connected as a voltage follower. With a +3V supply
and the load tied to ground, the output swings from
VOLTAGE (1V/div)
VCC = 3V
AV = +1
OUT
TIME (2µs/div)
Figure 3. Rail-to-Rail Input /Output Voltage Range
10,000
CAPACITIVE LOAD (pF)
Devices in the MAX4122–MAX4129 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, which combine to provide an
input common-mode range extending 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 200µV. The switchover transition region, which occurs near V CC / 2, has been
extended to minimize the slight degradation in CMRR
caused by the mismatch of the input pairs. Their low
offset voltage, high bandwidth, and rail-to-rail commonmode 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.
To reduce the offset error caused by input bias currents flowing through external source impedances,
match the effective impedance seen by each input
(Figures 1a, 1b). High source impedances, together
with the 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 the response.
The MAX4122–MAX4129’s inputs are protected from
large differential input voltages by 1kΩ series resistors
and back-to-back triple diodes across the inputs
(Figure 2). For differential input voltages less than 1.8V
the input resistance is typically 500kΩ. For differential
input voltages greater than 1.8V the input resistance is
approximately 2kΩ, and the input bias current is
determined by the following equation:
IN
MAX4122–MAX4129
Applications Information
UNSTABLE
REGION
1000
RL TO VEE
VOUT = VCC/2
100
100
1k
10k
100k
RESISTIVE LOAD (Ω)
Figure 4. Capacitive-Load Stability
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 (500Ω to ground).
Driving a capacitive load can cause instability in most
high-speed op amps, especially those with low quiescent
current. The MAX4122–MAX4129 have a high tolerance
for capacitive loads. They are stable with capacitive
loads up to 500pF. Figure 4 gives the stable operating
region for capacitive loads. Figures 5–8 show the
response with capacitive loads, and the results of adding
an isolation resistor in series with the output (Figure 9).
The resistor improves the circuit’s phase margin by isolating the load capacitor from the op amp’s output.
______________________________________________________________________________________
11
AV = +10
CL = 500pF
IN
(5mV/div)
IN
VOLTAGE
VOLTAGE (50mV/div)
AV = +1
CL = 500pF
OUT
(50mV/div)
OUT
TIME (1µs/div)
TIME (400ns/div)
Figure 5. MAX4122/23/26/27/29 Small-Signal Transient
Response with Capacitive Load
IN
Figure 6. MAX4124/25/28 Small-Signal Transient Response
with Capacitive Load
AV = +1
CL = 1000pF
RS = 39Ω
AV = +10
CL = 1000pF
RS = 56Ω
IN
(5mV/div)
VOLTAGE
VOLTAGE (50mV/div)
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
OUT
OUT
(50mV/div)
TIME (400ns/div)
TIME (1µs/div)
Figure 7. MAX4122/23/26/27/29 Transient Response to
Capacitive Load with Isolation Resistor
Figure 8. MAX4124/25/28 Transient Response to Capacitive
Load with Isolation Resistor
VCC
0V TO 2.7V
STEP FOR
POWER-UP
TEST. 2.7V 2k
FOR SHUTDOWN
ENABLE TEST.
RS
VOUT
SHDN
CL
2k
0V TO 2.7V
STEP FOR
SHUTDOWN
TEST
10k
10Ω
SUPPLY-CURRENT
MONITORING POINT
Figure 9. Capacitive-Load-Driving Circuit
12
Figure 10. Power-Up/Shutdown Test Circuit
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
OUT
ICC
(500µA/div)
VOLTAGE (1V/div)
VCC
(1V/div)
TIME (5µs/div)
Figure 11. Power-Up Output Voltage
MAX4122–MAX4129
VCC
TIME (5µs/div)
Figure 12. Power-Up Supply Current
VCC = 2.7V
RL = 10kΩ
VCC = 2.7V
SHDN
(1V/div)
SHDN
(1V/div)
OUT
(0.5V/div)
ICC
(500µA/div)
TIME (2µs/div)
Figure 13. Shutdown Output Voltage
TIME (2µs/div)
Figure 14. Shutdown Enable/Disable Supply Current
Power-Up and Shutdown Mode
Power Supplies and Layout
The MAX4122–MAX4129 amplifiers typically settle within 1µs after power-up. Using the test circuit of Figure
10, Figures 11 and 12 show the output voltage and
supply current on power-up.
The MAX4122–MAX4129 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 0.1µF ceramic capacitor in parallel
with at least 1µF. 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. To decrease stray capacitance, minimize
trace lengths and resistor leads by placing external
components close to the op amp’s pins.
The MAX4123, MAX4125, and MAX4127 have a shutdown option. When the shutdown pin (SHDN) is pulled
low, the supply current drops below 25µA per amplifier
and the amplifiers are disabled with the outputs in a
high-impedance state. Pulling SHDN high or leaving it
floating enables the amplifier. In the dual-amplifier
MAX4129, the shutdown functions operate independently. Figures 13 and 14 show the output voltage and
supply current responses of the MAX4123 to a shutdown pulse.
______________________________________________________________________________________
13
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
MAX4122–MAX4129
Pin Configurations
TOP VIEW
OUT 1
VEE 2
5
VCC
4
IN-
MAX4122
MAX4124
IN+ 3
SOT23-5
N.C. 1
IN1- 2
IN1+ 3
MAX4123
MAX4125
VEE 4
OUT1 1
8
SHDN
7
VCC
IN1- 2
6
OUT
IN1+ 3
5
N.C.
VEE 4
OUT1 1
14 VCC
IN1- 2
IN1+ 3
VEE 4
MAX4127
14
7
OUT2
6
IN2-
5
IN2+
OUT1 1
14 OUT4
13 OUT2
IN1- 2
13 IN4-
12 IN2-
IN1+ 3
12 IN4+
11 IN2+
VCC 4
10 N.C.
IN2+ 5
10 IN3+
IN2- 6
9
IN3-
OUT2 7
8
OUT3
SHDN1 6
9
SHDN2
N.C. 7
8
N.C.
SO
VCC
SO/µMAX
SO/µMAX
N.C. 5
MAX4126
MAX4128
8
MAX4129
11 VEE
SO
______________________________________________________________________________________
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
PART
TEMP. RANGE
PINPACKAGE
MARKING
INFO.
MAX4124EUK -40°C to +85°C
MAX4125ESA -40°C to +85°C
MAX4125EUA -40°C to +85°C
5 SOT23-5
8 SO
8 µMAX
AABA
—
—
MAX4126ESA -40°C to +85°C
MAX4126EUA -40°C to +85°C
MAX4127C/D
0°C to +70°C
8 SO
8 µMAX
Dice*
—
—
—
MAX4127ESD -40°C to +85°C
MAX4128ESA -40°C to +85°C
MAX4128EUA -40°C to +85°C
14 SO
8 SO
8 µMAX
—
—
—
MAX4129ESD -40°C to +85°C
14 SO
—
*Dice are specified at TA = +25°C, DC parameters only.
__________________________________________________________Chip Topographies
MAX4123/
MAX4125
V EE
MAX4127/
MAX4128
OUT1
IN-
V CC
IN1-
OUT2
SHDN
iN+
0.055"
(1.397mm)
0.066"
(1.676mm)
IN2-
IN1+
V CC
V EE
V EE
IN2+
OUT
0.036"
(0.914mm)
V CC SHDN1
V EE
V CC
SHDN2
0.053"
(1.346mm)
TRANSISTOR COUNT: 170
TRANSISTOR COUNT: 340
SUBSTRATE CONNECTED TO VEE
SUBSTRATE CONNECTED TO VEE
______________________________________________________________________________________
15
MAX4122–MAX4129
Ordering Information (continued)
________________________________________________________Package Information
SOT5L.EPS
MAX4122–MAX4129
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
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
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.