ICL7650SCPA-1

Overview

The ICL7650SCPA-1Z is a single-channel super chopper-stabilized operational amplifier manufactured by Renesas Electronics. It features a gain-bandwidth product of 2 MHz and a slew rate of 2.5 V/us. The device guarantees a maximum input offset voltage of 5 uV and an input bias current of 10 pA. Operating supply voltages range from 2.25 V to 8 V for dual supplies, or 4.5 V to 16 V for single supplies. It draws 3 mA of operating current and provides 30 mA output current per channel. Common-mode rejection ratio is 140 dB, with power supply rejection at 120 dB. The component is housed in an 8-pin PDIP package.

Feature Summary

• Super chopper-stabilized architecture virtually eliminates traditional chopper amplifier issues such as intermodulation effects and chopping spikes.
• Extremely low input offset voltage and temperature drift ensure high precision over the entire commercial temperature range.
• Integrated clamp circuit prevents overload recovery problems and allows use as a comparator.
• User-transparent CMOS circuitry requires only two external capacitors for nulling inputs.

Applications

• Precision signal conditioning for low-level sensor outputs
• High-impedance buffer stages requiring minimal input bias current
• Instrumentation amplifiers demanding high common-mode rejection
• Low-drift DC amplification circuits

Procurement Notes

Verify the specific suffix '1' against official Renesas documentation to confirm if it denotes a specific tape-and-reel variant or packaging difference compared to standard tube versions. Ensure the ordering part number matches the required package type (PDIP-8) and temperature range. Cross-reference the manufacturer's latest datasheet to confirm RoHS compliance status and any recent pinout revisions before finalizing procurement specifications.

Selection Notes

Select this component when ultra-low offset voltage and drift are critical requirements that cannot be met by standard bipolar op-amps. The 10 pA input bias current makes it suitable for high-impedance sources. Consider the 2 MHz bandwidth and 2.5 V/us slew rate for AC performance limits. Verify that the required supply voltage falls within the specified 2.25 V to 8 V dual supply range. Ensure PCB layout accommodates the necessary external nulling capacitors for optimal performance.

Part Context

This device belongs to the ICL7650 series of chopper-stabilized operational amplifiers originally developed by Intersil and now produced by Renesas. The series is designed for applications requiring exceptional DC accuracy. The ICL7650SCPA-1Z represents the improved Super Chopper version, offering better offset voltage and bias current characteristics than the original industry-standard ICL7650 while maintaining compatibility with existing designs.

Replacement Considerations

The ICL7650S is documented as an improved direct replacement for the standard ICL7650. Verify pin compatibility and electrical parameter improvements when substituting. Other second-source parts may exist but require careful verification of offset voltage and bias current specifications to ensure equivalent performance in precision applications.