ICL7611DCBA

Overview

The ICL7611DCBA is a single-channel, general-purpose CMOS operational amplifier manufactured by Intersil (Renesas). It features a gain-bandwidth product of 1.4 MHz and a slew rate of 1.6 V/µs. The device operates on a supply voltage range of 1 V to 8 V (single) or ±0.5 V to ±4 V (dual), with a typical supply current of 1 mA per channel. Key electrical characteristics include an input offset voltage of 15 mV, input bias current of 50 pA, and common-mode rejection ratio of 70 dB. It is housed in an 8-SOIC surface-mount package.

Feature Summary

• Low power consumption with 1 mA operating current
• Rail-to-rail output capability for maximum dynamic range
• CMOS construction ensuring low input bias current
• Single-supply operation from 1 V

Applications

• Battery-powered instrumentation circuits
• Active filters and signal conditioning stages
• Portable measurement devices requiring low quiescent current
• Sensor interface amplifiers

Procurement Notes

Verify the manufacturer origin, as Intersil operations are now part of Renesas Electronics. Confirm the specific suffix 'DCBA' indicates the tube packaging variant rather than tape-and-reel. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the datasheet revision date to ensure parameter consistency with your design specifications.

Selection Notes

Select this component when a low-cost, single-supply op-amp with rail-to-rail output is required. It is suitable for applications where moderate bandwidth (1.4 MHz) is sufficient but low power consumption is critical. Compare against higher-speed alternatives if slew rate limitations impact signal fidelity. Verify that the 15 mV input offset voltage meets the precision requirements of the target application.

Part Context

The ICL7611 belongs to the ICL7611 family of low-power CMOS operational amplifiers. This series is designed for cost-sensitive applications requiring basic amplification functions. The DCBA designation specifically refers to the plastic small-outline package variant. It serves as a standard general-purpose amplifier within the broader portfolio of linear integrated circuits offered by the manufacturer.

Replacement Considerations

Check for direct pin-compatible substitutes such as the LM321 or TLV2321, depending on specific performance needs like lower offset voltage or higher speed. Ensure replacement parts support the same 1 V minimum supply voltage and SOIC-8 package footprint.