ICL7641ECWE+

Overview

The ICL7641ECWE+ is a quad CMOS operational amplifier manufactured by Analog Devices Inc./Maxim Integrated. It features four independent channels within a single package, offering low power consumption with a supply current of 15 uA per channel. The device operates on dual power supplies ranging from 1 V to 8 V or single supplies from 2 V to 16 V. Key electrical specifications include a gain-bandwidth product of 44 kHz, a slew rate of 16 mV/us, and an input bias current of 50 pA. The input offset voltage is specified at 20 mV, with a common-mode rejection ratio of 60 dB. It is housed in a 16-SOIC surface-mount package and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Quad-channel CMOS architecture providing four independent low-power amplifiers in a compact surface-mount package.
• Low supply current consumption of 15 uA per channel, suitable for battery-powered applications.
• Operates on wide dual or single power supply voltages, supporting flexible system design.
• High input impedance with low input bias current, minimizing loading effects on signal sources.

Applications

• Battery-powered instrumentation circuits requiring low quiescent current.
• General-purpose analog signal conditioning and buffering.
• Sensor interface circuits where high input impedance is critical.
• Portable electronic devices utilizing single or dual low-voltage power supplies.

Procurement Notes

Verify component authenticity through authorized distributors, as the ICL7641ECWE+ is listed as obsolete. Confirm RoHS compliance status via official documentation, noting potential variations between legacy and newer manufacturing lots. Ensure the SOIC-16 package dimensions match PCB footprint requirements. Check for specific suffix variations that may indicate different temperature grades or packaging formats before finalizing procurement plans.

Selection Notes

Select this component when multiple low-power amplification stages are needed in a space-constrained design. The quad configuration reduces board area compared to using individual op-amps. Consider the 44 kHz bandwidth limit for high-frequency applications, as it may be insufficient for fast signal processing. The 20 mV input offset voltage should be evaluated against precision requirements. Verify that the 16 mV/us slew rate meets the dynamic performance needs of the target circuit.

Part Context

The ICL7641 belongs to the ICL764x series of CMOS operational amplifiers, which includes dual and quad variants. This family is characterized by low power consumption and compatibility with standard CMOS logic families. The ECWE+ designation indicates the E grade (commercial temperature range), WE package (SOIC-16), and lead-free/RoHS-compliant construction. It serves as a general-purpose solution for cost-sensitive analog applications requiring multiple amplification channels.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.