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