ICL7612ACPA

Overview

The ICL7612ACPA is a single operational amplifier from the ICL761X family, manufactured by Maxim Integrated (formerly Harris Semiconductor). It utilizes CMOS technology and features an ultra-low input bias current of 1pA. The device operates within a supply voltage range of ±1V to ±8V or single supplies from 2V to 16V. Key electrical parameters include a maximum input offset voltage of 3000µV, a bandwidth of 0.044MHz, and a slew rate of 0.016V/µs. It is housed in an 8-pin PDIP package with a commercial temperature range of 0°C to 70°C.

Feature Summary

• Ultra-low input bias current of 1pA suitable for high-impedance circuits
• Pin-selectable quiescent currents allowing optimization for power consumption
• CMOS outputs swing to within millivolts of supply rails

Applications

• Long time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers

Procurement Notes

Verify the manufacturer origin carefully, as the part was originally designed by Harris Semiconductor before Maxim Integrated acquired the product line. Confirm that the 'A' suffix denotes the commercial temperature grade (0°C to 70°C) and the 'PA' suffix indicates the plastic DIP-8 package. Ensure compatibility with the specific pin-selectable quiescent current configuration required for your circuit design.

Selection Notes

Select this component when ultra-low input bias current is critical, such as in charge amplification or integration applications. The CMOS architecture allows operation over a wide supply voltage range, providing flexibility for both single and dual supply systems. Consider the low bandwidth and slew rate limitations; this op amp is not suitable for high-speed signal processing but excels in precision DC applications.

Part Context

The ICL7612ACPA belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers. This family combines low-power operation with extremely low input currents. The ICL7612 specifically refers to the single-channel version of this series, offering a cost-effective solution for precision analog tasks where power consumption and input leakage must be minimized.

Replacement Considerations

Compatible substitutes within the same family include the ICL7611 (single), ICL7612 (single), ICL7613 (dual), and ICL7614 (quad). Verify that the replacement maintains the same package type and temperature rating.