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 (AV = +25V/V to +101V/V). High-voltage fault protection withstands ±17V at either input without damage or excessive current draw (MAX4074/MAX4075 only).

Features

♦ Internal Gain-Setting Resistors in SOT23

Packages (MAX4074)

♦ 0.1 Gain Accuracy (RF/RG) (MAX4074/75)

♦ 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

♦ 34µA Supply Current (MAX4074/75)

♦ Up to 4MHz GBW Product

♦ 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

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