MAX4174/MAX4175/MAX4274/MAX4275 Full Data Sheet (PDF)
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General Description
The MAX4174/MAX4175/MAX4274/MAX4275 Gain-
AmpTM family combines a low-cost Rail-to-Rail
op amp
with precision internal gain-setting resistors and V
CC
/ 2
biasing. 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 only 300A.
GainAmp amplifiers are optimally compensated for
each gain version, achieving exceptional GBW prod-
ucts up to 23MHz (A
V
= +25V/V to +101V/V). High-volt-
age fault protection withstands 17V at either input
without excessive current draw.
Three versions are available in this amplifier family: single/
dual/quad open-loop, unity-gain stable (MAX4281/
MAX4282/MAX4284); single/dual fixed gain (MAX4174/
MAX4274); and single/dual fixed gain plus internal
V
CC
/ 2 bias at the noninverting input (MAX4175/
MAX4275), which simplifies input biasing in single-supply
designs. 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 outputs can swing rail-to-rail and drive a 1k
load
while maintaining excellent DC accuracy. The amplifier
is stable for capacitive loads up to 470pF.
Applications
Portable Instruments
Smart-Card Readers
Instruments, Terminals,
Infrared Receivers for
and Bar-Code Readers
Remote Controls
Keyless Entry
Low-Side Current-Sense
Photodiode Preamps
Amplifiers
Features
o
GainAmp Family Provides Internal Precision
Gain-Setting Resistors in SOT23 (MAX4174/5)
o
0.1% Gain Accuracy (R
F
/R
G
) (MAX4174/5,
MAX4274/5)
o
54 Standard Gains Available (MAX4174/5,
MAX4274/5)
o
Open-Loop Unity-Gain-Stable Op Amps
(MAX4281/2/4)
o
Rail-to-Rail Outputs Drive 1k
Load
o
Internal V
CC
/ 2 Biasing (MAX4175/MAX4275)
o
+2.5V to +5.5V Single Supply
o
300A Supply Current
o
Up to 23MHz GBW Product
o
Fault-Protected Inputs Withstand 17V
o
Stable with Capacitive Loads Up to 470pF with
No Isolation Resistor
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
________________________________________________________________
Maxim Integrated Products
1
19-1407; Rev 3; 8/99
PART
*
MAX4174
_EUK-T
-40C to +85C
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
Ordering Information continued at end of data sheet.
*
Insert the desired gain code (from the Gain Selection Guide)
in the blank to complete the part number.
Refer to the Gain Selection Guide for a list of preferred gains
and SOT Top Marks.
Ordering Information
GainAmp is a trademark of Maxim Integrated Products. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Patent pending
Pin Configurations
Typical Operating Circuit
MAX4175
INPUT
IN-
IN+
+5V
R
B
R
B
OUT
V
CC
V
CC
V
EE
V
EE
R
G
0.1
F
R
F
0.1
F
0.1
F
TOP VIEW
MAX4174
5
4
1
2
3
IN-
OUT
V
CC
V
EE
R
G
R
F
IN+
+
SOT23-5
Selector Guide appears at end of data sheet.
Pin Configurations continued at end of data sheet.
TOP
MARK
MAX4175
_EUK-T
-40C to +85C
5 SOT23-5
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MAX4174/MAX4175/MAX4274/MAX4275 Fixed-Gain
Amplifiers
(V
CC
= +2.5V to +5.5V, V
EE
= 0, V
IN+
= V
IN-
= V
CC
/ 2, R
L
to V
CC
/ 2, R
L
= open, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at V
CC
= +5V and T
A
= +25C.) (Note 1)
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.
Supply Voltage (V
CC
to V
EE
) ....................................-0.3V to +6V
Voltage Inputs (IN_)
MAX4281/4282/4284.....................(V
EE
- 0.3V) to (V
CC
+ 0.3V)
MAX4174/4175/4274/4275 (with respect to GND) ...........17V
Output Short-Circuit Duration
(OUT_).....................................Continuous to Either V
EE
or V
CC
Continuous Power Dissipation (T
A
= +70C)
5-Pin SOT23 (derate 7.1mW/C above +70C).............571mW
8-Pin SO (derate 5.88mW/C above +70C).................471mW
8-Pin MAX (derate 4.1mW/C above +70C) ............330mW
14-Pin SO (derate 8.3mW/C above +70C)...............667mW
16-Pin QSOP (derate 8.3mW/C above +70C)..........667mW
Operating Temperature Range ...........................-40C to +85C
Maximum Junction Temperature .....................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
R
L
= 1k
R
L
= 100k
MAX4174/MAX4274
Shorted to V
CC
Shorted to V
EE
Guaranteed by PSRR tests
V
CC
= 2.5V to 5.5V
IN_+, MAX4174/MAX4274 (Note 2)
MAX4175/MAX4275
MAX4175/MAX4275,
includes V
CC
/ 2 bias resistors
MAX4174/MAX4274
R
L
= 100k
CONDITIONS
mV
60
150
Output Voltage Swing
(Note 4)
150
250
2
8
2
8
V
OH
/V
OL
mA
65
Short-Circuit Current
10
0.02
R
OUT
Closed-Loop Output
Impedance
dB
70
90
PSRR
Power-Supply Rejection
Ratio
k
75
Noninverting Input
Resistance
M
1000
330
510
300
460
V
2.5
5.5
V
CC
Supply Voltage Range
150
nA
0.05
10
I
BIAS
Input Bias Current
V/C
Input Offset Voltage Drift
5
320
480
A
355
530
I
CC
Supply Current
(per Amplifier)
0.5
2.5
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
CC
= 3V
V
CC
= 5V
V
CC
= 3V
V
CC
= 5V
mV
V
OS
Input Offset Voltage
A
V
< 25V/V
k
40
Inverting Input Resistance
A
V
> 25V/V
V
CC
- V
OH
V
OL
- V
EE
V
CC
- V
OH
V
OL
- V
EE
MAX4175/MAX4275, V
IN
+ = V
IN
-
V
V
CC
/ 2
V
CC
/ 2
- 0.25
+ 0.25
IN_+ Bias Voltage
Guaranteed by functional test (Note 3)
V
V
EE
V
CC
- 1.2
IN_+ Input Voltage Range
Guaranteed by functional test
V
V
EE
V
CC
IN_- Input Voltage Range
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--MAX4174/MAX4175/MAX4274/MAX4275 Fixed-Gain
Amplifiers (continued)
(V
CC
= +2.5V to +5.5V, V
EE
= 0, V
IN+
= V
IN-
= V
CC
/ 2, R
L
to V
CC
/ 2, R
L
= open, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
Gain = +5V/V
Gain = +3V/V
Gain = +1.25V/V
No sustained oscillations
f = 10kHz (Note 5)
Output settling to 1%
CONDITIONS
970
970
1700
pF
470
C
LOAD
Capacitive Load Stability
nV/
Hz
90
e
n
Input Noise Voltage Density
ms
1
Power-Up Time
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
CC
= 5V, V
OUT
= 4V step
V/s
0.7
SR
Slew Rate
Gain = +51V/V
Gain = +25V/V
Gain = +10V/V
kHz
330
BW
-3dB
-3dB Bandwidth
590
640
f = 10kHz
fA/
Hz
4
i
n
Input Noise Current Density
V
CC
= 5V, V
OUT
= 4V step
s
7
Settling Time to Within
0.01%
(V
EE
+ 25mV) < V
OUT
< (V
CC
- 25mV),
R
L
= 100k
(Note 6)
%
0.1
0.5
DC Gain Accuracy
ELECTRICAL CHARACTERISTICS--MAX4281/MAX4282/MAX4284 Open-Loop Op Amps
(V
CC
= +2.5V to +5.5V, V
EE
= 0, V
IN+
= V
IN-
= V
CC
/ 2, R
L
to V
CC
/ 2, R
L
= open, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at V
CC
= +5V and T
A
= +25C.) (Note 1)
Guaranteed by CMRR test
V
V
EE
- 0.15
V
CC
- 1.2
Guaranteed by PSRR tests
CMVR
Common-Mode Input
Voltage Range
Differential or common mode
CONDITIONS
R
IN
Input Resistance
M
1000
V
2.5
5.5
V
CC
Supply Voltage Range
10
1000
nA
0.05
10
I
BIAS
Input Bias Current
V/C
Input Offset Voltage Drift
5
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
pA
I
OS
Input Offset Current
V
CC
= 3V
A
290
450
I
CC
Supply Current
(per Amplifier)
R
L
= 100k
mV
0.5
2
V
OS
Input Offset Voltage
V
CC
= 5V
A
320
500
C
IN
Input Capacitance
pF
2.5
V
EE
- 0.15V
V
CM
V
CC
- 1.2V
dB
60
90
CMRR
Common-Mode Rejection
Ratio
V
CC
= 2.5V to 5.5V
dB
70
90
PSRR
Power-Supply Rejection
Ratio
A
V
= 1V/V
0.02
R
OUT
Closed-Loop Output
Impedance
Typical Operating Characteristics
(V
CC
= +5V, R
L
= 100k
to V
CC
/ 2, small-signal V
OUT
= 100mVp-p, large-signal V
OUT
= 1Vp-p, T
A
= +25C, unless otherwise noted.)
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
4
_______________________________________________________________________________________
Note 1:
MAX4174/MAX4175/MAX4281 and MAX4274/MAX4275/MAX4282 and MAX4284 are 100% production tested at
T
A
= +25C. All temperature limits are guaranteed by design.
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 GainAmp.
Note 4:
For A
V
= -0.5V/V and A
V
= -0.25V/V, the output voltage swing is limited by the input voltage range.
Note 5:
Includes noise from on-chip resistors.
Note 6:
The gain accuracy test is performed with the GainAmp in noninverting configuration. The output voltage swing is limited by
the input voltage range for certain gains and supply voltage conditions. For situations where the output voltage swing is lim-
ited by the valid input range, the output limits are adjusted accordingly.
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC01
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +2.25V/V
A
V
= +1.25V/V
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC02
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +4V/V
A
V
= +2.5V/V
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC03
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +9V/V
A
V
= +5V/V
Shorted to V
EE
MHz
2
No sustained oscillations, A
V
= 1V/V
f = 10kHz
V
CC
= 5V, V
OUT
= 4V step
GBW
R
L
= 100k
V
CC
= 5V, V
OUT
= 4V step
s
V
EE
+ 0.05V < V
OUT
< V
CC
- 0.1V, R
L
= 100k
mA
Gain Bandwidth Product
V/s
R
L
= 1k
10
CONDITIONS
0.7
7
SR
Slew Rate
Settling Time to within 0.01%
Short-Circuit Current
pF
470
C
LOAD
Capacitive Load Stability
nV/
Hz
60
e
n
Input Noise Voltage Density
Shorted to V
CC
mA
65
V
EE
+ 0.25V < V
OUT
< V
CC
- 0.3V, R
L
= 1k
160
250
dB
60
100
80
100
2
8
mV
2
8
V
OH
/V
OL
Output Voltage Swing
dB
A
VOL
Large-Signal Voltage Gain
90
120
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
ELECTRICAL CHARACTERISTICS--MAX4281/MAX4282/MAX4284 Open-Loop Op Amps
(continued)
(V
CC
= +2.5V to +5.5V, V
EE
= 0, V
IN+
= V
IN-
= V
CC
/ 2, R
L
to V
CC
/ 2, R
L
= open, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at V
CC
= +5V and T
A
= +25C.) (Note 1)
V
CC
- V
OH
V
OL
- V
EE
V
CC
- V
OH
V
OL
- V
EE
f = 10kHz
fA/
Hz
1.8
i
n
Input Noise Current Density
Output settling to 1%
ms
1
Power-Up Time
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
CC
= +5V, R
L
= 100k
to V
CC
/ 2, small-signal V
OUT
= 100mVp-p, large-signal V
OUT
= 1Vp-p, T
A
= +25C, unless otherwise noted.)
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC04
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +21V/V
A
V
= +10V/V
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC05
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +50V/V
A
V
= +25V/V
4
-6
1k
100k
1M
10k
10M
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC06
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +100V/V
A
V
= +51V/V
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC07
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +2.25V/V
A
V
= +1.25V/V
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC08
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +4V/V
A
V
= +2.5V/V
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC09
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +9V/V
A
V
= +5V/V
MAX4174/MAX4175
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC10
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +21V/V
A
V
= +10V/V
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC11
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +50V/V
A
V
= +25V/V
4
-6
1k
100k
1M
10k
10M
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4174 TOC12
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
A
V
= +100V/V
A
V
= +51V/V
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