Rainbow Electronics MAX4284 - Manual

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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 1k
Ω
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
♦ GainAmp Family Provides Internal Precision
Gain-Setting Resistors in SOT23 (MAX4174/5)
♦ 0.1% Gain Accuracy (R F /R G ) (MAX4174/5,
MAX4274/5)
♦ 54 Standard Gains Available (MAX4174/5,
MAX4274/5)
♦ Open-Loop Unity-Gain-Stable Op Amps
(MAX4281/2/4)
♦ Rail-to-Rail Outputs Drive 1k
Ω
Load
♦ Internal V CC / 2 Biasing (MAX4175/MAX4275)
♦ +2.5V to +5.5V Single Supply
♦ 300µA Supply Current
♦ Up to 23MHz GBW Product
♦ Fault-Protected Inputs Withstand ±17V
♦ 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 -40°C to +85°C
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 µ F
R F
0.1 µ F
0.1 µ 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 †† -40°C to +85°C 5 SOT23-5