Analog Devices Inc./Maxim Integrated ICL7652BCPA

Overview

ICL7652BCPA from Maxim Integrated is a precision chopper-stabilized operational amplifier in 8-pin PDIP package, featuring 10µV max input offset voltage, 0.1µV/°C max offset drift, and 1.5MHz gain-bandwidth product. It serves as the front-end signal conditioner in high-accuracy instrumentation amplifiers for strain gauge and thermocouple interfaces.

For engineers reviewing the ICL7652BCPA datasheet, ICL7652BCPA pinout, ICL7652BCPA application, or ICL7652BCPA equivalent, key selection criteria include ultra-low offset stability over temperature, rail-to-rail input capability with ±15V supply operation, and immunity to 1/f noise in DC-coupled measurement paths.

Technical Context

The ICL7652BCPA uses a dual-chopper architecture with auto-zeroing on both input and output stages, enabling continuous correction of input offset and its drift. Its internal clock operates at 10kHz, and the device maintains stable performance without external capacitors.

It supports single- or dual-supply operation (±4.5V to ±18V), delivers ±12V output swing into 10kΩ, and exhibits 120dB CMRR and PSRR across DC–100Hz. No external trimming components are required for specified offset accuracy.

Key Specifications

Pinout & Package

ICL7652BCPA is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is marked by a notch or dot; leads are tin-lead plated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision chopper op-amp applications.

Compared with MAX4238ASA+ and LTC2057HMS8#PBF, the ICL7652BCPA uniquely offers PDIP packaging with guaranteed 10µV max offset and full ±15V compatibility-critical for retrofitting legacy test equipment and industrial control panels where through-hole mounting and established power rails are mandatory.

Availability

ICL7652BCPA is available at Aetrix Electronics and suitable for strain gauge amplification, thermocouple conditioning, high-resolution DMMs, and precision data acquisition systems requiring stable component supply across long-lifecycle industrial deployments.

Supply support for ICL7652BCPA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The ICL7652BCPA belongs to Maxim's legacy precision op-amp family, engineered specifically for DC-coupled, low-drift measurement systems where long-term calibration stability and 50/60Hz noise immunity are essential.

FAQ

What is the maximum operating temperature range for the ICL7652BCPA?

The ICL7652BCPA is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade temperature range is specified in the original Maxim datasheet and applies to all electrical parameters including input offset voltage and drift. The ICL7652BCPA maintains its 10µV max offset and 0.1µV/°C drift performance across this full range without derating. Applications requiring extended temperature operation should consider alternatives such as the ICL7652CPE, which is rated for −40°C to +85°C.

Does the ICL7652BCPA require external capacitors for chopper clock stabilization?

No, the ICL7652BCPA integrates a fixed 10kHz chopper clock and does not require external timing components. However, it does require a 0.01µF capacitor between Pin 8 (Reference) and V+ to stabilize the internal clock reference node, and 0.1µF bypass capacitors on both V+ (Pin 7) and V− (Pin 4). These are decoupling and reference-stabilization components-not clock-setting elements. The ICL7652BCPA functions correctly with only these three capacitors and no additional external frequency-determining parts.

Can the ICL7652BCPA operate from a single +5V supply?

No, the ICL7652BCPA is not specified for single-supply operation. Its absolute maximum ratings and electrical characteristics are defined only for dual-supply configurations ranging from ±4.5V to ±18V. The input common-mode range extends to within 0.3V of each rail, but the output swing is asymmetric under single-supply conditions and not characterized. For +5V single-supply applications, engineers should select modern zero-drift op-amps such as the MAX44260 or ADA4522-1, not the ICL7652BCPA.

Is the ICL7652BCPA pin-compatible with the ICL7650?

No, the ICL7652BCPA is not pin-compatible with the ICL7650. While both are chopper-stabilized op-amps from Maxim, the ICL7650 uses an 8-pin metal-can package with different pin assignments-including separate substrate and guard pins-and lacks the Reference (Pin 8) terminal found on the ICL7652BCPA. The ICL7652BCPA's Pin 8 is functionally unique and required for internal clock stability. Board-level replacement requires layout revision; the ICL7652BCPA is not a drop-in upgrade for ICL7650-based designs.

What is the purpose of Pins 1 and 5 on the ICL7652BCPA?

Pins 1 and 5 on the ICL7652BCPA form the offset null connection points for a 10kΩ potentiometer. The wiper connects to Pin 1, and the two outer terminals connect to Pins 1 and 5 respectively-allowing manual adjustment of residual input offset voltage. This nulling network is optional; the ICL7652BCPA meets its 10µV max offset specification without trimming. However, for applications demanding sub-5µV offset, the ICL7652BCPA supports fine-tuning via this two-terminal interface, unlike newer zero-drift op-amps that omit null pins entirely.