ICL7641BCPD

Overview

The ICL7641BCPD is a quad CMOS operational amplifier from the ICL764X family, manufactured by Analog Devices Inc. (Maxim Integrated). It features four independent amplifiers in a single package with pin-selectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier. The device operates from ±1V to ±8V dual supplies or 2V to 16V single supplies. Key electrical parameters include a gain-bandwidth product of 44 kHz, a slew rate of 16 mV/µs, and an input bias current of 50 pA. The typical input offset voltage is 5 mV, with a common-mode rejection ratio of 60 dB. It utilizes a 14-pin DIP package.

Feature Summary

• Pin-selectable quiescent current allows optimization for power consumption versus performance
• CMOS output stage provides rail-to-rail swing capability within millivolts of supply voltages
• Ultra-low input bias current ensures minimal loading on high-impedance signal sources

Applications

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

Procurement Notes

Verify the specific suffix 'BCPD' against official datasheets to confirm the temperature grade and package type. Confirm RoHS compliance status as manufacturing practices may vary. Check availability status as older CMOS components may be subject to discontinuation or limited stock. Ensure the selected pin-selectable current configuration matches the design requirements before ordering.

Selection Notes

Select this component when low power consumption and ultra-low input bias current are critical. The pin-selectable quiescent current feature offers flexibility for different operating modes. Consider the 44 kHz bandwidth limit for high-speed applications. Verify that the 14-pin DIP package fits the PCB layout constraints. Compare with other members of the ICL764X family if different channel counts or packages are needed.

Part Context

The ICL7641BCPD belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers. This family combines ultra-low input current with low-power operation over a wide supply voltage range. The '7641' designation indicates a quad amplifier configuration, while 'BC' typically denotes commercial temperature range and specific offset voltage grades. The 'PD' suffix specifies the plastic DIP package.

Replacement Considerations

Direct pin-for-pin replacements within the same family include ICL7641CCPD and ICL7641ECPD, which offer variations in temperature range and electrical specifications. Other members like ICL7642 (dual) or ICL7643 (triple) share the same architecture but differ in channel count.