19-1526; Rev 1; 10/99
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
General Description
The MAX4074–MAX4078 GainAmp™ op amp family
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
up to 4MHz (A
V
= +25V/V to +101V/V). High-voltage
fault protection withstands ±17V at either input without
damage or excessive current draw (MAX4074/MAX4075
only).
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.
For space-critical applications, the MAX4074/MAX4076
are available in space-saving SOT23-5 packages.
Features
o
Internal Gain-Setting Resistors in SOT23
Packages (MAX4074)
o
0.1% Gain Accuracy (R
F
/R
G
) (MAX4074/75)
o
54 Standard Gains Available (MAX4074/75)
o
Open-Loop, Unity-Gain-Stable Op Amps
(MAX4076/77/78)
o
Rail-to-Rail Outputs Drive 1kΩ Load (MAX4074/75)
o
+2.5V to +5.5V Single Supply
o
34µA Supply Current (MAX4074/75)
o
Up to 4MHz GBW Product
o
Fault-Protected Inputs Withstand ±17V
(MAX4074/75)
o
200pA max Input Bias Current (MAX4076/77/78)
o
Stable with Capacitive Loads up to 100pF
with No Isolation Resistor
MAX4074–MAX4078
†
Ordering Information
PART
MAX4074__EUK-T
MAX4074__ESA
TEMP. RANGE
-40°C to +70°C
-40°C to +70°C
PIN-
PACKAGE
5 SOT23-5
8 SO
TOP
MARK
**
—
Applications
Portable Battery-Powered Equipment
Instruments, Terminals, and Bar-Code Readers
Keyless Entry
Photodiode Preamps
Smart-Card Readers
Infrared Receivers for Remote Controls
Low-Side Current-Sense Amplifiers
Ordering Information continued at end of data sheet.
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.
Pin Configurations/
Functional Diagrams
TOP VIEW
MAX4074
OUT 1
R
F
V
EE
2
5
V
CC
Gain Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
IN+
3
R
G
4
IN-
†
Patent pending.
GainAmp is a trademark of Maxim Integrated Products.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
SOT23-5
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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