Data Sheet

MAX74821

Precision, Low Noise, CMOS, Rail-to-Rail, Input/Output Operational Amplifier

Rev. 0

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FEATURES



Low offset voltage: 300µV maximum



Low input bias currents: 5pA maximum



Low noise: 9nV/√Hz



Wide bandwidth: 10MHz



High slew rate: 5V/µs



High open-loop gain: 120dB



Unity gain stable



Single-supply operation: 5.5V



Low supply current: 1.15mA/amplifier

APPLICATIONS



Photodiode amplification



Optical control loops



Battery-powered instrumentation



Loop-powered instrumentation



Multipole filters



Sensors



Barcode scanners



Audio

GENERAL DESCRIPTION

The MAX74821 is a dual rail-to-rail input and output,

single-supply amplifier. The MAX74821 features very low

offset voltage, low input voltage and current noise, and

wide signal bandwidth. The MAX74821 uses the Analog

Devices Inc. patented DigiTrim® trimming technique1,

which achieves superior precision without the switching

noise associated with chopping or auto-zeroing

techniques.

The combination of low offsets, low noise, very low

input bias currents, and high speed makes this amplifier

useful in a wide variety of applications. Filters,

integrators, photodiode amplifiers, and high impedance

sensors all benefit from the combination of

performance features. Audio and other AC applications

benefit from the wide bandwidth and low distortion.

Applications for these amplifiers include optical control

loops, portable and loop-powered instrumentation,

and audio amplification for portable devices.

The MAX74821 is specified over the extended industrial

temperature range (−40°C to +125°C). The MAX74821

dual is available in an 8-lead MSOP package.

1

Protected by U.S. Patent No. 5,969,657.