MAX4284 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Op Amps

19-1407; Rev 3; 8/99
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
General Description
The MAX4174/MAX4175/MAX4274/MAX4275 Gain-
Amp™ 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 300µA.
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 1kΩ load
while maintaining excellent DC accuracy. The amplifier
is stable for capacitive loads up to 470pF.
Portable Instruments
Instruments, Terminals,
and Bar-Code Readers
Keyless Entry
Photodiode Preamps
Applications
Smart-Card Readers
Infrared Receivers for
Remote Controls
Low-Side Current-Sense
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 1kΩ Load
o Internal V_CC / 2 Biasing (MAX4175/MAX4275)
o +2.5V to +5.5V Single Supply
o 300µA 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
Ordering Information
PART*
TEMP. RANGE
PIN-
TOP
PACKAGE MARK
MAX4174_EUK-T -40°C to +85°C 5 SOT23-5 ^††
MAX4175_EUK-T -40°C to +85°C 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.
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
MAX4174
OUT 1
+
V_EE 2
IN+ 3
5 V_CC
R_F
R_G
4 IN-
SOT23-5
Pin Configurations continued at end of data sheet.
Typical Operating Circuit
IN+
0.1µF
INPUT _IN-
0.1µF
+5V
V_CC
V_CC
R_B
MAX4175
0.1µF
R_B
OUT
V_EE
R_G
R_F
V_EE
†_{Patent pending}
GainAmp is a trademark of Maxim Integrated Products. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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