MAX4074ACESA-T [MAXIM]
Operational Amplifier, 1 Func, 3500uV Offset-Max, PDSO8, 0.150 INCH, MS-012AA, SOIC-8;
| 型号： | MAX4074ACESA-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operational Amplifier, 1 Func, 3500uV Offset-Max, PDSO8, 0.150 INCH, MS-012AA, SOIC-8 光电二极管 |
| 文件： | 总20页 (文件大小：649K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1526; Rev 1; 10/99
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
General Description
Features
The MAX4074–MAX4078 GainAmp™ op amp family
ꢀ Internal Gain-Setting Resistors in SOT23
Packages (MAX4074)
ꢀ 0.1% Gain Accuracy (R /R ) (MAX4074/75)
®
combines low-cost Rail-to-Rail op amps with precision
internal gain-setting resistors. Factory-trimmed on-chip
resistors decrease design size, cost, and layout, and
provide 0.1% gain accuracy. Fixed inverting gains from
-0.25V/V to -100V/V or noninverting gains from +1.25V/V
to +101V/V are available. These devices operate from a
single +2.5V to +5.5V supply and consume just 34µA.
GainAmp amplifiers are optimally compensated for each
gain version, achieving gain bandwidth (GBW) products
F
G
ꢀ 54 Standard Gains Available (MAX4074/75)
ꢀ Open-Loop, Unity-Gain-Stable Op Amps
(MAX4076/77/78)
ꢀ Rail-to-Rail Outputs Drive 1kΩ Load (MAX4074/75)
ꢀ +2.5V to +5.5V Single Supply
up to 4MHz (A = +25V/V to +101V/V). High-voltage
V
fault protection withstands 17V at either input without
damage or excessive current draw (MAX4074/MAX4075
only).
ꢀ 34µA Supply Current (MAX4074/75)
ꢀ Up to 4MHz GBW Product
Two versions are available in this amplifier family. The
MAX4076/MAX4077/MAX4078 are single/dual/quad
open-loop, unity-gain-stable op amps, and the
MAX4074/MAX4075 are single/dual fixed-gain op
amps. The input common-mode voltage range of the
open-loop amplifiers extends from 150mV below the
negative supply to within 1.2V of the positive supply.
The GainAmp outputs can swing rail-to-rail and drive a
1kΩ load while maintaining excellent DC accuracy
(MAX4074/MAX4075 only). The amplifiers are stable for
capacitive loads up to 100pF.
ꢀ Fault-Protected Inputs Withstand 17V
(MAX4074/75)
ꢀ 200pA max Input Bias Current (MAX4076/77/78)
ꢀ Stable with Capacitive Loads up to 100pF
with No Isolation Resistor
Ordering Information
PIN-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
For space-critical applications, the MAX4074/MAX4076
are available in space-saving SOT23-5 packages.
MAX4074__EUK-T -40°C to +70°C 5 SOT23-5
MAX4074__ESA -40°C to +70°C 8 SO
Ordering Information continued at end of data sheet.
**
—
Applications
Portable Battery-Powered Equipment
Instruments, Terminals, and Bar-Code Readers
Keyless Entry
Note: Insert the desired gain code in the blank to complete the
part number (see the Gain Selector Guide).
**See the Gain Selector Guide for a list of preferred gains and
top marks.
Photodiode Preamps
Smart-Card Readers
Pin Configurations/
Functional Diagrams
Infrared Receivers for Remote Controls
Low-Side Current-Sense Amplifiers
TOP VIEW
MAX4074
1
OUT
5
V
CC
R
F
2
V
EE
Gain Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
R
G
4
IN-
3
IN+
SOT23-5
Pin Configurations continued at end of data sheet.
GainAmp is a trademark of Maxim Integrated Products.
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 1-800-835-8769.
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
ABSOLUTE MAXIMUM RATINGS
Supply Voltages (V
to V ) ..................................-0.3V to +6V
8-Pin µMAX (derate 4.1mW/°C above +70°C)..............330mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
CC
EE
Voltage Inputs (IN_)
MAX4076/MAX4077/MAX4078 .....(V
+ 0.3V) to (V - 0.3V)
CC
EE
MAX4074/MAX4075.......................................................... 17V
Output Short-Circuit Duration to Either Supply (OUT_)....Continuous
Continuous Power Dissipation (T = +70°C)
A
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ............571mW
14-Pin TSSOP (derate 6.3mW/°C above +70°C) ..........500mW
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.
ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075
(V
= +2.5V to +5.5V, V = 0, V
= V = V /2, R = ∞ to V /2, T = T
to T
, unless otherwise noted. Typical values
MAX
CC
EE
IN+
IN-
CC
L
CC
A
MIN
are at V
= +5V and T = +25°C.) (Note 1)
CC
A
PARAMETER
SYMBOL
CONDITIONS
Guaranteed by PSRR test
MIN
TYP
MAX
5.5
55
UNITS
Supply Voltage Range
V
CC
2.5
V
V
CC
V
CC
= 5V
= 3V
37
34
Supply Current (per amplifier)
I
µA
CC
50
Input Offset Voltage
V
R = 1MΩ
0.2
0.3
0.8
300
80
3.5
mV
µV/°C
pA
OS
L
Input Offset Voltage Drift
Input Bias Current (Note 2)
I
1000
IN+_
A < +25V/V
V
Inverting Input Resistance
Noninverting Input Resistance
Positive Input Voltage Range
R
IN_
kΩ
MΩ
V
A
V
≥ +25V/V
R
1000
IN_+
V
0.15
-
V
CC
-
EE
IN_+
Guaranteed by functional test (Note 3)
Guaranteed by functional test (Note 3)
1.2
Negative Input Voltage Range
Power-Supply Rejection Ratio
Closed-Loop Output Impedance
IN_-
15
96
V
dB
Ω
PSRR
V
CC
= 2.5V to 5.5V
70
R
OUT
0.2
5
Shorted to V
Shorted to V
CC
Output Short-Circuit Current
mA
-22
0.5
0.4
25
EE
V
CC
V
OL
V
CC
V
OL
V
CC
V
OL
- V
2.5
2.5
150
80
OH
R = 1MΩ
L
- V
- V
EE
OH
EE
Output Voltage Swing (Note 4)
mV
R = 10kΩ
L
- V
- V
11
300
100
1000
600
OH
EE
R = 1kΩ
L
- V
2
_______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075 (continued)
(V
are at V
= +2.5V to +5.5V, V = 0, V
= V = V /2, R = ∞ to V /2, T = T
to T
, unless otherwise noted. Typical values
MAX
CC
EE
IN+
IN-
CC
L
CC
A
MIN
= +5V and T = +25°C.) (Note 1)
CC
A
PARAMETER
SYMBOL
CONDITIONS
Output settling to 1%
MIN
TYP
9
MAX
UNITS
ms
Power-Up Time
Slew Rate
SR
V
OUT
V
OUT
= 4V step
= 4V step
100
60
V/ms
µs
Settling Time (to 0.01%)
Input Voltage Noise Density
Input Noise Current Density
Capacitive Load Stability
e
n
f = 5kHz (Note 5)
f = 5kHz
150
500
500
nV/√Hz
fA/√Hz
pF
C
LOAD
No sustained oscillations
(V + 25mV) < V
EE
OUT
T
= +25°C
0.01
1.0
1.2
A
A
DC Gain Accuracy
< (V
- 25mV),
%
CC
T
= T
to T
MAX
MIN
R = 1MΩ (Note 6)
L
A = +1.25V/V
200
90
V
A = +3V/V
V
-3dB Bandwidth
BW (-3dB)
kHz
A = +5V/V
V
80
A = +10V/V
V
90
A = +25V/V
V
120
ELECTRICAL CHARACTERISTICS—MAX4076/MAX4077/MAX4078
(V
are at V
= +2.5V to +5.5V, V = 0, V
= V = V /2, R = ∞ to V /2, T = T
to T
, unless otherwise noted. Typical values
MAX
CC
EE
IN+
IN-
CC
L
CC
A
MIN
= +5V and T = +25°C.) (Note 1)
CC
A
PARAMETER
SYMBOL
CONDITIONS
Guaranteed by PSRR test
MIN
TYP
MAX
5.5
UNITS
Supply Voltage Range
V
CC
2.5
V
V
CC
V
CC
= 5V
= 3V
45
40
60
Supply Current (per amplifier)
I
µA
CC
55
Input Offset Voltage
V
R = 1MΩ
L
1.2
1.5µV
1
3.5mV
mV
µV/°C
pA
OS
Input Offset Voltage Drift
Input Bias Current (Note 2)
Input Offset Current
I
200
IBIAS
I
0.4
pA
OS
0.15
V
1.2
Common-Mode Input Voltage
Range
CC -
I
VR
Guaranteed by CMRR
V
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Closed-Loop Output Impedance
CMRR
PSRR
(V
- 1.2V) ≥ V
≥ -0.15V
CM
70
70
95
95
dB
dB
Ω
CC
V
CC
= 2.5V to 5.5V
R
OUT
A = +1V/V
V
0.2
4.5
20
Shorted to V
Shorted to V
CC
Output Short-Circuit Current
mA
EE
0.05V < V
0.25V < V
0.25V < V
< (V
- 0.1V), R = 1MΩ
80
80
80
117
95
OUT
OUT
OUT
CC
CC
CC
L
Large-Signal Voltage Gain
A
VOL
< (V
< (V
- 0.3V), R = 10kΩ
L
dB
- 0.3V), R = 5kΩ
93
L
_______________________________________________________________________________________
3
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
ELECTRICAL CHARACTERISTICS—MAX4076/MAX4077/MAX4078 (continued)
(V
are at V
= +2.5V to +5.5V, V = 0, V
= V = V /2, R = ∞ to V /2, T = T
to T
, unless otherwise noted. Typical values
MAX
CC
EE
IN+
IN-
CC
L
CC
A
MIN
= +5V and T = +25°C.) (Note 1)
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
0.23
0.22
12
MAX
2.5
2.5
50
UNITS
V
CC
V
OL
V
CC
V
OL
V
CC
V
OL
- V
OH
R = 1MΩ
L
- V
EE
- V
OH
Output Voltage Swing
V /V
OH OL
R = 10kΩ
L
mV
- V
- V
7
50
EE
100
100
230
90
100
100
OH
EE
R = 5kΩ
L
- V
Gain-Bandwidth Product
Slew Rate
GBW
SR
kHz
V/ms
µs
V
V
= 4V step
= 4V step
OUT
Settling Time (to 0.01%)
Input Voltage Noise Density
Input Noise Current Density
Capacitive Load Stability
Power-Up Time
69
OUT
e
n
f = 5kHz
f = 5kHz
110
1.1
100
10
nV/√Hz
fA/√Hz
pF
C
LOAD
No sustained oscillations, A = +1V/V
V
Output settling to 1%
ms
Note 1: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 2: Guaranteed by design.
Note 3: The input common-mode range for IN_+ is guaranteed by a functional test. A similar test is done on the IN_- input. See the
Applications Information section for more information on the input voltage range of the GainAmps.
Note 4: For A = -0.5V/V and A = -0.25V/V, the output voltage swing may be limited by the input voltage range.
V
V
Note 5: Includes noise from on-chip resistors.
Note 6: The gain accuracy test is performed with the GainAmps in the noninverting configuration. The output voltage swing is limit-
ed by the input voltage range for certain gains and supply voltage conditions. For situations where the output voltage swing
is limited by the valid input range, the output limits are adjusted accordingly.
Typical Operating Characteristics
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
L CC A
CC
MAX4074/MAX4075
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
4
4
4
V = 100mVp-p
OUT
V
= 100mVp-p
V
= 100mVp-p
OUT
3
2
3
2
3
2
OUT
1
0
1
0
1
0
A
= +2.5V/V
A
= +1.25V/V
V
V
A
= +5V/V
V
-1
-2
-1
-2
-1
-2
A
= +4V/V
V
A
= +2.25V/V
V
A
= +9V/V
V
-3
-4
-3
-4
-3
-4
-5
-6
-5
-6
-5
-6
1k
10k
100k
1M
1k
10k
100k
1M
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
4
_______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Typical Operating Characteristics
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
L CC A
CC
MAX4074/MAX4075
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
4
4
4
V
= 100mVp-p
V
= 100mVp-p
V
= 100mVp-p
OUT
OUT
OUT
3
2
3
2
3
2
1
0
1
0
1
0
A
= +51V/V
V
A
= +10V/V
V
-1
-2
-1
-2
-1
-2
A
= +25V/V
V
A
= +21V/V
V
A = +50V/V
V
A = +101V/V
V
-3
-4
-3
-4
-3
-4
-5
-6
-5
-6
-5
-6
1k
10k
100k
1M
1k
10k
100k
1M
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN vs. FREQUENCY
LARGE-SIGNAL GAIN vs. FREQUENCY
LARGE-SIGNAL GAIN vs. FREQUENCY
4
4
4
V
= 1Vp-p
V
= 1Vp-p
OUT
V
= 1Vp-p
OUT
OUT
3
2
3
2
3
2
1
0
1
0
1
0
A
= +1.25V/V
V
A
= +2.5V/V
V
A = +5V/V
V
-1
-2
-1
-2
-1
-2
A = +4V/V
V
A
= +2.25V/V
V
A
= +9V/V
V
-3
-4
-3
-4
-3
-4
-5
-6
-5
-6
-5
-6
1k
10k
100k
1M
1k
10k
100k
1M
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN vs. FREQUENCY
LARGE-SIGNAL GAIN vs. FREQUENCY
LARGE-SIGNAL GAIN vs. FREQUENCY
4
4
4
V
= 1Vp-p
V
= 1Vp-p
OUT
V
= 1Vp-p
OUT
OUT
3
2
3
2
3
2
1
0
1
0
1
0
A
= +25V/V
A
= +10V/V
V
V
A = +51V/V
V
-1
-2
-1
-2
-1
-2
A = +101V/V
V
A
= +21V/V
V
A = +50V/V
V
-3
-4
-3
-4
-3
-4
-5
-6
-5
-6
-5
-6
1k
10k
100k
1M
1k
10k
100k
1M
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
_______________________________________________________________________________________
5
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Typical Operating Characteristics (continued)
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
CC
L
CC
A
MAX4074/MAX4075
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
vs. OUTPUT VOLTAGE SWING
0
0
-20
-30
-40
-50
-60
-70
-80
-90
V
= 1Vp-p
OUT
V
= 1Vp-p
OUT
f = 10kHz
-10
-20
-10
-20
A
V
= +3V/V
-30
-40
-30
-40
A
= +3V/V
V
A
= +10V/V
V
-50
-60
-50
-60
A
= +1.25V/V
V
-70
-80
-70
-80
A
= +10V/V
V
A
= +51V/V
V
A
= +25V/V
V
-90
-90
A
= +1.25V/V
V
-100
-100
100
1k
10k
100k
100
1k
10k
100k
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOLTAGE SWING (Vp-p)
FREQUENCY (Hz)
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
vs. OUTPUT VOLTAGE SWING
1000
100
10
-20
-30
-40
-50
-60
-70
-80
f = 10kHz
A
= +3V/V
V
A
V
= +10V/V
A
= +51V/V
V
A
= +1.25V/V
V
A
= +25V/V
V
-90
0
1
10
100 1k
10k 100k 1M 10M
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOLTAGE SWING (Vp-p)
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY
vs. FREQUENCY
CURRENT NOISE DENSITY
vs. FREQUENCY
1000
100
10
A
= +25V/V
V
1
A
= +51V/V
V
10
1
0.1
10
100 1k
10k 100k 1M 10M
1
10 100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
6
_______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Typical Operating Characteristics (continued)
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
L CC A
CC
MAX4074/MAX4075
SMALL-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
INPUT
INPUT
OUTPUT
OUTPUT
50mV/div
500mV/div
A = +1.25V/V
A = +1.25V/V
V
V
OUTPUT
OUTPUT
50mV/div
500mV/div
A = +3V/V
V
A = +3V/V
V
OUTPUT
OUTPUT
50mV/div
500mV/div
A = +5V/V
V
A = +5V/V
V
OUTPUT
OUTPUT
50mV/div
500mV/div
V
A = +10V/V
V
A = +10V/V
OUTPUT
OUTPUT
50mV/div
500mV/div
V
A = +25V/V
V
A = +25V/V
OUTPUT
OUTPUT
50mV/div
500mV/div
V
A = +51V/V
V
A = +51V/V
10µs/div
10µs/div
_______________________________________________________________________________________
7
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Typical Operating Characteristics (continued)
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
L CC A
CC
POWER-SUPPLY REJECTION
vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY
OUTPUT VOLTAGE SWING
vs. R
LOAD
0
1k
100
10
300
250
200
150
100
50
-10
-20
-30
-40
-50
-60
-70
-80
1
V
- V
CC OH
-90
V
- V
OL EE
-100
0.1
0
100
1k
10k
100k
100
1k
10k
100k
1M
1
10
(kΩ)
100
FREQUENCY (Hz)
FREQUENCY (Hz)
R
LOAD
INPUT OFFSET VOLTAGE vs. TEMPERATURE
100
INPUT BIAS CURRENT vs. TEMPERATURE
600
500
400
300
200
100
0
V
- V = 5.5V
CC EE
75
50
MAX4074/4075
- V = 2.5V
V
CC EE
25
0
V
- V = 5.5V
CC EE
V
- V = 5.5V
CC EE
-25
-50
-75
-100
V
- V = 2.5V
CC EE
MAX4076/77/78
V
- V = 2.5V
CC EE
-100
-200
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE (°C)
-45 -30 -15
0
15 30 45 60 75 90
TEMPERATURE (°C)
V
AND V vs. TEMPERATURE
OL
V
AND V vs. TEMPERATURE
OH OL
OH
(V - V = 2.5V)
(V - V = 5.5V)
SUPPLY CURRENT vs. TEMPERATURE
CC
EE
CC
EE
175
150
450
400
350
300
250
200
40.0
37.5
35.0
32.5
30.0
V
, R = 1kΩ
L
OH
V
- V = 5.5V
CC EE
125
100
75
50
25
0
V
, R = 1kΩ
L
OH
V
V
- V = 4.0V
CC EE
V
, R = 100kΩ
L
OH
150
100
50
V
V
, R = 10kΩ
OH
- V = 3.0V
CC EE
L
V
, R = 100kΩ
OH L
V
V
, R = 10kΩ
L
OH
, R = 10kΩ
OL
L
-25
-50
0
-50
-100
V
, R = 100kΩ
OL
V
- V = 2.5V
CC EE
L
, R = 10kΩ
L
OL
V
, R = 100kΩ
OL L
-75
V
, R = 1kΩ
L
OL
V
, R = 1kΩ
L
OL
-100
-150
-50 -35 -20 -5 10 25 40 55 70 85
-50 -35 -20 -5 10 25 40 55 70 85
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
8
_______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Typical Operating Characteristics (continued)
(V
= +5.0V, R = 100kΩ to V /2, T = +25°C, unless otherwise noted.)
L CC A
CC
MAX4076/MAX4077/MAX4078
SMALL-SIGNAL GAIN vs. FREQUENCY
LARGE-SIGNAL GAIN vs. FREQUENCY
VOLTAGE NOISE vs. FREQUENCY
4
4
1k
3
2
3
2
1
0
1
0
-1
-2
-1
-2
100
-3
-4
-3
-4
-5
-6
-5
-6
10
1k
10k
100k
1M
10M
1k
10k
100k
1M
10M
1
10
100 1k
10k 100k 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4077
CROSSTALK vs. FREQUENCY
CURRENT NOISE vs. FREQUENCY
-80
-40
-50
-60
-70
-80
100
10
1
A
= +1V/V
V
-85
-90
-95
-100
-105
-110
-115
-120
-125
-130
-90
0.1
100
1k
10k
100k
1k
10k
100k
1M
1
10
100 1k
10k 100k 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4078
GAIN AND PHASE
vs. FREQUENCY
COMMON-MODE REJECTION
vs. FREQUENCY
ALL HOSTILE CROSSTALK vs. FREQUENCY
MAX4076-8 toc8
-60
120
80
270
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
THREE AMPLIFIERS DRIVEN,
ONE OUTPUT MEASURED.
-65
-70
180
90
40
GAIN
-75
-80
0
-40
0
PHASE
-85
-90
-90
-180
-270
-360
-80
-95
-120
-160
-100
-105
-110
-200
-450
1k
10k
100k
1M
1
10 100
1k 10k 100k 1M 10M
1
10 100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
_______________________________________________________________________________________
9
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Pin Description
PIN
MAX4075
MAX4074/MAX4076
MAX4078
NAME
FUNCTION
MAX4077
SOT23
SO
µMAX/SO
SO/TSSOP
1, 7, 8, 14
11
1
2
6
1, 7
4
OUT_
Amplifier Output
4
V
Negative Supply or Ground
Noninverting Amplifier Input
Inverting Amplifier Input
EE
3
3
3, 5
2, 6
8
3, 5, 10, 12
2, 6, 9, 13
4
IN_+
IN_-
4
2
7
5
V
CC
Positive Supply
—
1, 5, 8
—
—
N.C.
No Connection. Not internally connected.
_______________Detailed Description
Maxim’s GainAmp fixed-gain amplifiers combine a low-
cost rail-to-rail op amp with internal gain-setting resis-
tors. Factory-trimmed on-chip resistors provide 0.1%
gain accuracy while decreasing design size, cost, and
layout. There are two versions in this amplifier family:
single/dual/quad open-loop, unity-gain-stable devices
(MAX4076/MAX4077/MAX4078), and single/dual fixed-
gain devices (MAX4074/MAX4075). All amplifiers fea-
ture rail-to-rail outputs and drive a 10kΩ load while
maintaining excellent DC accuracy.
V
CC
-R
R
F
A =
V
G
R
R
F
R
R
A = 1 +
V
F
G
G
IN-
V
EE
OUT
Open-Loop Op Amps
The single/dual/quad MAX4076/MAX4077/MAX4078 are
low-power, open-loop op amps with rail-to-rail outputs.
These devices are compensated for unity-gain stability
and feature a GBW product of 230kHz. The common-
mode range extends from 150mV below the negative
rail to within 1.2V of the positive rail. These high-perfor-
mance op amps serve as the core for this family of
GainAmp fixed-gain amplifiers. Although the -3dB band-
width will not correspond to that of a fixed-gain amplifier
in higher gain configurations, these open-loop op amps
can be used to prototype designs.
IN+
Figure 1. Internal Gain-Setting Resistors
Internal Gain-Setting Resistors
Maxim’s proprietary laser trimming techniques allow
R /R values (Figure 1) that produce many different
F
G
gain configurations. These GainAmp fixed-gain ampli-
fiers feature a negative-feedback resistor network that
is laser trimmed to provide a gain-setting feedback
ratio (R /R ) with 0.1% typical accuracy. The standard
F
G
op amp pinouts allow the GainAmp fixed-gain ampli-
fiers to plug directly into existing board designs, easily
replacing op amps-plus-resistor gain blocks.
10 ______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
the protection of sensitive input stage circuitry. Current
GainAmp Bandwidth
GainAmp fixed-gain amplifiers feature factory-trimmed
precision resistors to provide fixed inverting gains from
-0.25V/V to -100V/V or noninverting gains from +1.25V/V
to +101V/V. The op amp core is decompensated strate-
gically over the gain-set options to maximize band-
width. Open-loop decompensation increases GBW
product, ensuring that usable bandwidth is maintained
with increasing closed-loop gains. A GainAmp with a
through the clamp diodes is limited by a 5kΩ resistor at
the noninverting input, and by R at the inverting input.
G
An IN+ or IN- fault voltage as high as 17V causes less
than 3.5mA to flow through the input pin, protecting
both the GainAmp and the signal source from damage.
Applications Information
GainAmp fixed-gain amplifiers offer a precision, fixed-
gain amplifier in a small package that can be used in a
variety of circuit board designs. GainAmp fixed-gain
amplifiers can be used in many op amp circuits that
use resistive negative feedback to set gain, and do not
require other connections to the op amp inverting input.
Both inverting and noninverting op amp configurations
can be implemented easily using a GainAmp.
fixed gain of A = +25V/V has a -3dB bandwidth of
V
120kHz. By comparison, a unity-gain-stable op amp con-
figured for A = +25V/V would yield a -3dB bandwidth
V
of only 8kHz. Decompensation is performed at five inter-
mediate gain sets, as shown in the Gain Selector
Guide.
High-Voltage (±±7V)
Input Fault Protection
GainAmp Input Voltage Range
The MAX4074/MAX4075 combine both an op amp and
gain-setting feedback resistors on the same IC. The
inverting input voltage range is different from the nonin-
verting input voltage range because the inverting input
The MAX4074/MAX4075 family includes 17V input
fault protection. For normal operation, see the input
voltage range specification in the Electrical Character-
istics. Overdriven inputs up to 17V will not cause out-
put phase reversal. A back-to-back SCR structure at
the input pins allows either input to safely swing 17V
pin is connected to the R input series resistor. Just as
G
with a discrete design, take care not to saturate the
inputs/output of the core op amp to avoid signal distor-
tions or clipping.
relative to V (Figure 2). Additionally, the internal op
EE
amp inputs are diode clamped to both supply rails for
R
F
R
G
IN-
17V
SCR
OUT
V
EE
V
CC
5k
IN+
17V
SCR
MAX4074
MAX4075
V
EE
V
EE
NOTE: INPUT STAGE PROTECTION INCLUDES TWO 17V SCRs
AND TWO DIODES AT THE INPUT STAGE.
Figure 2. Input Protection
______________________________________________________________________________________ 11
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
GainAmp Signal Coupling
and Configurations
Common op amp configurations include both noninvert-
ing and inverting amplifiers. Figures 3–6 show various
single- and dual-supply circuit configurations. In single-
supply systems, use a resistor-divider to bias the nonin-
verting input. A lowpass filter capacitor from the op amp
input to ground (Figure 5) prevents high-frequency
power-supply noise from coupling into the op amp input.
Dual-supply systems can have ground-referenced sig-
nals DC-coupled into the inverting or noninverting inputs.
MAX4074
V
CC
R
R
F
V
= - V
IN
OUT
(
)
G
V
EE
V
IN
R
R
F
G
Supply Bypassing and Board Layout
All devices in this GainAmp family operate from a +2.5V
to +5.5V single supply or from 1.25V to 2.75V dual
supplies. For single-supply operation, bypass the power
supply with a 0.1µF capacitor to ground. For dual sup-
plies, bypass each supply to ground. Bypass with
capacitors as close to the device as possible to mini-
mize lead inductance and noise. A printed circuit board
with a low-inductance ground plane is recommended.
Figure 4. Dual-Supply, DC-Coupled Inverting Amplifier
MAX4074
V
CC
V
CC
Capacitive-Load Stability
Driving large capacitive loads can cause instability in
most low-power, rail-to-rail output amplifiers. The fixed-
gain amplifiers of this GainAmp family are stable with
capacitive loads up to 100pF. Stability with higher
capacitive loads can be improved by adding an isola-
tion resistor in series with the op amp output, as shown
in Figure 7. This resistor improves the circuit’s phase
margin by isolating the load capacitor from the amplifi-
er’s output. In Figure 8, a 220pF capacitor is driven with
a 100Ω isolation resistor exhibiting some overshoot but
no oscillation. Figures 9 and 10 show the typical small-
signal pulse responses of GainAmp fixed-gain ampli-
fiers with 47pF and 100pF capacitive loads and no
isolation resistor
V
2
R
F
R
G
CC
V
=
- V
IN
OUT
(
)
0.1µF
V
IN
R
R
F
G
Figure 5. Single-Supply, AC-Coupled Inverting Amplifier
MAX4074
V
CC
V
CC
V
IN
R
R
F
MAX4074
V
= V 1+
IN
OUT
(
)
G
V
EE
V
CC
R
F
V
IN
R
R
F
R
G
G
-R
F
V
=
(V )
IN
OUT
R
G
Figure 3. Single-Supply, DC-Coupled Inverting Amplifier with
Negative Input Voltage
Figure 6. Dual-Supply, DC-Coupled Noninverting Amplifier
12 ______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
MAX4074
INPUT
R
R
F
G
A = +5V/V
V
OUTPUT
OUTPUT
50mV/div
V
CC
R
ISO
OUTPUT
A = +5V/V
V
500mV/div
INPUT
C
R
L
L
V
EE
Figure 7. Dual-Supply, Capacitive-Load-Driving Circuit
Figure 8. Small-Signal/Large-Signal Transient Response with
Excessive Capacitive Load and Isolation Resistor
______________________________________________________________________________________ 13
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
INPUT
INPUT
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +1.25V/V
A = +1.25V/V
V
V
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +3V/V
V
A = +3V/V
V
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +5V/V
V
A = +5V/V
V
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +10V/V
A = +10V/V
V
V
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +25V/V
V
A = +25V/V
V
OUTPUT
OUTPUT
50mV/div
50mV/div
A = +51V/V
V
A = +51V/V
V
10µs/div
10µs/div
Figure 9. GainAmp Small-Signal Pulse Response (C = 340pF,
R = 100kΩ)
L
Figure 10. GainAmp Small-Signal Pulse Response (C = 940pF,
L
R = 100kΩ)
L
L
14 ______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Gain Selector Guide
GAIN
CODE
INVERTING
GAIN (V/V)
NONINVERTING
GAIN (V/V)
-3dB BW
(kHz)
TOP MARK
AB
AC
AD
AE
AF
0.25
0.5
1
1.25
1.5
2
200
136
102
70
ADJB
ADJC
ADJD
ADJE
ADJF
ADJG
ADJH
ADJI
1.25
1.5
2
2.25
2.5
3
180
135
116
90
AG
AH
AJ
2.5
3
3.5
4
AK
AL
4
5
80
ADJJ
ADJK
ADJL
ADJM
ADJN
ADJO
ADJP
ADJQ
ADJR
ADJS
ADJT
ADJU
ADJV
ADJW
ADJX
ADJY
ADJZ
ADKA
ADKB
5
6
71
AM
AN
AO
BA
BB
BC
BD
BE
BF
6
7
61
8
9
50
9
10
11
13.5
16
21
25
26
31
41
50
51
61
80
100
101
90
10
12.5
15
20
24
25
30
40
49
50
60
79
99
100
79
64
54
40
120
106
89
BG
BH
BJ
BK
BL
67
50
82
66
BM
BN
CA
50
40
38
Note: Bold indicates preferred gains. These gain versions are available as samples and in small quantities.
______________________________________________________________________________________ 15
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Pin Configurations/Functional Diagrams
TOP VIEW
MAX4074
MAX4076
MAX4076
N.C.
N.C.
8
7
6
5
8
7
6
5
N.C.
IN-
1
2
3
4
N.C.
IN-
1
2
3
4
1
2
3
5
4
OUT
V
CC
V
V
CC
CC
V
EE
-
+
-
IN+
OUT
N.C.
IN+
OUT
N.C.
IN+
IN-
SOT23-5
V
EE
V
EE
SO
SO
MAX4077
MAX4078
MAX4075
8
OUTA
INA-
1
V
CC
OUTA
INA-
1
14 OUTD
13 IND-
OUTA
INA-
1
8 V
CC
R
F
+
+
+
+
+
+
2
3
4
5
6
7
6
5
2
3
4
OUTB
INB-
7
6
5
2
3
4
OUTB
R
G
R
F
12
11
10
9
INA+
IND+
INA+
INA+
INB-
INB+
V
EE
V
CC
R
G
INC+
INC-
INB+
INB-
V
EE
INB+
V
EE
µMAX/SO
µMAX/SO
+
+
8
OUTB
7
OUTC
SO/TSSOP
16 ______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Ordering Information (continued)
___________________Chip Information
TRANSISTOR COUNTS
PIN-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
MAX4074: 180
MAX4075: 360
MAX4076: 180
MAX4077: 340
MAX4078: 332
MAX4075__EUA
MAX4075__ESA
MAX4076EUK-T
MAX4076ESA
MAX4077EUA
MAX4077ESA
MAX4078EUD
MAX4078ESD
-40°C to +70°C 8 µMAX
-40°C to +70°C 8 SO
-40°C to +70°C 5 SOT23-5
-40°C to +70°C 8 SO
-40°C to +70°C 8 µMAX
-40°C to +70°C 8 SO
-40°C to +70°C 14 TSSOP
-40°C to +70°C 14 SO
—
—
**
—
—
—
—
—
Typical Operating Circuit
Note: Insert the desired gain code in the blank to complete the
part number (see the Gain Selector Guide).
**See the Gain Selector Guide for a list of preferred gains and
top marks.
+5V
V
V
CC
CC
0.1µF
V
CC
MAX4074
IN+
IN-
0.1µF
OUT
INPUT
0.1µF
R
R
F
G
V
EE
______________________________________________________________________________________ 17
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Package Information
18 ______________________________________________________________________________________
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Package Information (continued)
______________________________________________________________________________________ 19
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
Package Information (continued)
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.
20 ____________________Maxim Integrated Products, ±20 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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