ICL7652P

Overview

The ICL7652P is a precision, single-channel operational amplifier manufactured by National Semiconductor. It utilizes Advanced LinCMOS technology to achieve chopper-stabilized performance, ensuring extremely low offset voltage and drift. The device operates within a supply voltage range of 7V to 36V total (±3.5V to ±18V). Key electrical characteristics include a maximum input offset voltage of 5µV at 25°C, an input bias current of 30pA, and a gain-bandwidth product of 1.9MHz. It features rail-to-rail input capability down to the negative supply and offers high common-mode rejection and power supply rejection ratios.

Feature Summary

• Chopper-stabilized architecture for zero-drift precision
• Rail-to-rail input stage compatible with negative supply
• Advanced LinCMOS process for low power consumption

Applications

• Precision sensor signal conditioning
• High-impedance transducer interfaces
• Low-level DC measurement systems

Procurement Notes

Verify the manufacturer designation as National Semiconductor or its successor entities, as corporate ownership changes may affect part sourcing. Confirm the package type corresponds to the PDIP-8 configuration. Ensure compliance with RoHS directives if required for the specific application environment. Check for obsolescence status or lifecycle notices from the current rights holder before finalizing procurement plans.

Selection Notes

Select this component when ultra-low offset voltage and minimal temperature drift are critical requirements. The rail-to-rail input feature allows operation close to the negative supply rail, simplifying single-supply designs. Consider the 1.9MHz bandwidth for applications requiring moderate speed alongside high DC accuracy. Evaluate the 30pA bias current suitability for high-impedance source circuits.

Part Context

The ICL7652 belongs to the family of precision chopper-stabilized amplifiers designed for applications demanding high DC accuracy. It represents an evolution in LinCMOS technology, offering improved noise and bandwidth over earlier generations while maintaining microvolt-level offset specifications. This series is distinct from standard bipolar op-amps due to its unique modulation technique for drift cancellation.

Replacement Considerations

Public confirmed substitute part numbers: OPA182.