ICL7650CPA

Overview

The ICL7650CPA is a chopper-stabilized operational amplifier manufactured by Maxim Integrated. It features an 8-pin Plastic DIP package and operates within a temperature range of 0°C to +70°C. Key electrical parameters include a maximum input offset voltage of ±10µV, a maximum input bias current of 4pA, and a unity-gain bandwidth of 2MHz. The device offers a minimum common-mode rejection ratio of 120dB and a supply current of 2mA.

Feature Summary

• Chopper-stabilized architecture provides continuous error correction for minimal drift over time and temperature
• Integrated output clamp circuit reduces overload recovery time
• Monolithic low-power CMOS design eliminates the need for offset voltage trimming
• High impedance differential inputs suitable for high-impedance signal sources

Applications

• Precision Amplifier
• Instrumentation Amplifier
• Thermocouples
• Strain Gauges

Procurement Notes

Verify that the component matches the specific 8-pin Plastic DIP package configuration. Confirm the commercial temperature rating aligns with system requirements. Ensure the ordering suffix corresponds to the intended pinout and performance specifications defined in the official datasheet.

Selection Notes

Select this component for applications requiring ultra-low DC offset and drift without manual calibration. Consider the trade-off between the lower noise of the ICL7652 and the higher gain-bandwidth product of the ICL7650. Ensure external nulling capacitors are selected for low leakage to maintain optimal performance.

Part Context

This device belongs to the ICL7650/ICL7653 family of chopper-stabilized amplifiers designed for low-level signal processing. It serves as an improved second source to Intersil's ICL7650B/ICL7653B, offering enhanced versatility and performance characteristics for precision analog circuits.

Replacement Considerations

The ICL7650BCPA is listed as an exact replacement for Intersil’s ICL7650B/ICL7653B. Verify pin compatibility when substituting standard industry devices like the LM741 or LM101, as external capacitor connections differ.

FAQ

How does the ICL7650 achieve low offset voltage?

It uses a nulling scheme where a nulling amplifier alternately nulls itself and the main amplifier, providing continuous error correction.

What is the function of the CLAMP pin?

The output clamp minimizes overload recovery time by preventing uncontrolled input differential and charge build-up on correction-storage capacitors during saturation.