ICL7642ECPD

Overview

The ICL7642ECPD is a quad monolithic CMOS operational amplifier from the ICL761X–ICL764X family. It features four independent amplifiers in a 14-pin Plastic DIP package with an operating temperature range of 0°C to +70°C. Key electrical parameters include a unity-gain bandwidth of 44 kHz, a slew rate of 16 mV/µs, and an input bias current of 50 pA maximum at room temperature. The device operates on supply voltages ranging from ±1V to ±8V (or 2V to 16V single supply) with a typical quiescent current of 15 µA per amplifier.

Feature Summary

• Monolithic low-power CMOS design combining ultra-low input current with wide supply voltage operation
• Industry-standard pinouts for direct replacement in existing designs
• Pin-for-pin second source availability ensuring supply chain flexibility

Applications

• Long-time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers
• pH meters and photodiode amplifiers

Procurement Notes

Verify the specific suffix 'E' corresponds to the required commercial temperature range (0°C to +70°C). Confirm that the 14-pin PDIP package aligns with the target PCB footprint. Ensure the application does not require the programmable quiescent current feature available only in single or triple variants within this family.

Selection Notes

Select this component when four identical low-bias amplifiers are needed in a standard through-hole package. Note that unlike single or triple versions, the quad configuration has fixed quiescent currents rather than pin-selectable options. Verify that the 44 kHz bandwidth meets the signal processing requirements before finalizing the design.

Part Context

This part belongs to the ICL761X–ICL764X series of precision operational amplifiers manufactured by Analog Devices / Maxim Integrated. The series is characterized by its high input impedance and extremely low bias currents, making it suitable for high-impedance sensor interfaces. The 'E' designation specifically denotes the extended commercial temperature grade compared to industrial or military grades.

Replacement Considerations

Check datasheets for other ICL7642 variants (e.g., CC, BC) to confirm temperature range compatibility. Verify pinout alignment if substituting with generic CMOS op-amps, as internal offset nulling pins may differ.