ICL7641CCPD

Overview

The ICL7641CCPD is a quad CMOS operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices Inc. (Maxim Integrated). It features four independent amplifiers in a 14-pin PDIP package. The device operates on supply voltages ranging from ±1V to ±8V or single supplies from 2V to 16V. Key electrical parameters include a typical input bias current of 1pA and a maximum of 4nA at +125°C. The gain-bandwidth product is 44 kHz with a slew rate of 16 mV/µs. Input offset voltage is specified at 5 mV for the C-grade variant, while input bias current is 50 pA. Quiescent current is 15 µA per amplifier.

Feature Summary

• Ultra-low input bias current of 1pA typical ensures minimal loading on high-impedance sources
• Pin-selectable quiescent currents allow optimization between power consumption and performance
• Rail-to-rail CMOS output swings within millivolts of supply rails
• Monolithic low-power CMOS design suitable for battery-powered applications

Applications

• Long-time constant integrators requiring low leakage
• Picoammeters and low-current measurement circuits
• Low droop rate sample-and-hold amplifiers
• pH meters and photodiode amplifiers with high source impedance

Procurement Notes

Verify component authenticity through authorized distributors as this part may be discontinued. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any parameter updates. Ensure storage conditions meet CMOS specifications to prevent degradation. Validate supplier documentation against official Analog Devices records before integration into production.

Selection Notes

Select this component when ultra-low input bias current is critical for signal integrity. Compare quiescent current options based on power constraints versus bandwidth requirements. Verify that the 44 kHz gain-bandwidth product meets application frequency needs. Ensure supply voltage range aligns with system power architecture. Consider thermal performance if operating near maximum temperature limits.

Part Context

Part of the ICL761X–ICL764X family of monolithic CMOS op amps designed for low-power, high-impedance applications. The ICL7641 variant provides four amplifiers in a single package, offering space efficiency compared to single-channel counterparts. Manufactured under Maxim Integrated, now part of Analog Devices Inc., maintaining industry-standard pinouts for compatibility.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family such as ICL7642 or ICL7643 depending on channel count requirements. Verify equivalent electrical parameters including bias current and supply voltage range. Confirm package compatibility before substitution.