General Description

Maxim’s ICL7650/ICL7653 are chopper-stabilized

amplifiers, ideal for low-level signal processing applications.

Featuring high performance and versatility, these

devices combine low input offset voltage, low input bias

current, wide bandwidth, and exceptionally low drift

over time and temperature. Low offset is achieved

through a nulling scheme that provides continuous

error correction. A nulling amplifier alternately nulls

itself and the main amplifier. The result is an input offset

voltage that is held to a minimum over the entire operating

temperature range.

The ICL7650B/ICL7653B are exact replacements for

Intersil’s ICL7650B/ICL7653B. These devices have a

10μV max offset voltage, a 0.1μV/°C max input offset

voltage temperature coefficient, and a 20pA max bias

current—all specified over the commercial temperature

range.

A 14-pin version is available that can be used with

either an internal or external clock. The 14-pin version

has an output voltage clamp circuit to minimize overload

recovery time.

Features

 ICL7650/53 are Improved Second Sources to

ICL7650B/53B

 Lower Supply Current: 2mA

 Low Offset Voltage: 1μV

 No Offset Voltage Trimming Needed

 High-Gain CMRR and PSRR: 120dB min

 Lower Offset Drift with Time and Temperature

 Extended Common-Mode Voltage Range

 Low DC Input Bias Current: 10pA

 Monolithic, Low-Power CMOS Design