ICL7621BESA+

Overview

The ICL7621BESA+ is a dual-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family. It features an industry-standard 8-pin Slim Small Outline (SO) package and operates within a temperature range of -40°C to +85°C. The device supports wide supply voltages ranging from ±1V to ±8V, or single supplies from 2V to 16V. Key electrical characteristics include a typical input bias current of 1pA, a maximum input offset voltage of 5mV at 25°C, and internally compensated unity-gain stability.

Feature Summary

• Ultra-low input bias current for high-impedance source applications
• Rail-to-rail output swing capability approaching supply voltages
• Internally compensated for unity-gain stability
• Programmable quiescent current selection via external pin configuration

Applications

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

Procurement Notes

Verify that the ordering suffix '+T' corresponds to tape-and-reel packaging rather than tube delivery. Confirm the 'E' series designation matches the required -40°C to +85°C operating temperature range. Ensure the manufacturer is identified as Analog Devices Inc. or Maxim Integrated to guarantee component authenticity and datasheet alignment.

Selection Notes

Select this part when low power consumption and ultra-low input bias currents are critical. The dual-channel architecture allows for cost-effective implementation in multi-stage signal conditioning circuits. Verify that the fixed quiescent current settings of the dual variant meet the bandwidth and slew rate requirements for the specific application frequency.

Part Context

This component belongs to the ICL761X–ICL764X family of precision CMOS operational amplifiers. The family encompasses single, dual, triple, and quad configurations with varying offset voltage grades and temperature ranges. The ICL7621 specifically provides two independent amplifiers in a compact surface-mount footprint suitable for space-constrained designs.

Replacement Considerations

The ICL7621DESA+ serves as a direct pin-compatible replacement offering a wider commercial temperature range of 0°C to +70°C. Other family members such as the ICL7621BCSA provide alternative offset voltage specifications while maintaining identical pinouts and functionality.