ISL28156FBZ

Instrumentation, Op Amps, Buffer Amps Overview

The ISL28156FBZ is a micropower precision operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.4V to 5.5V, or dual supplies of ±1.2V to ±2.5V. The device draws a typical supply current of 39µA when enabled and 10µA when disabled. Key electrical specifications include a gain bandwidth product of 250kHz, a maximum input offset voltage of 120µV in the SOIC-8 package, and a maximum input bias current of 5nA. It includes an enable pin for power management.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Features Input Range Enhancement Circuit (IREC) allowing input voltages to exceed the positive supply rail while maintaining CMRR performance.
• Includes an enable pin that reduces supply current consumption significantly when the device is disabled.
• Provides rail-to-rail output swing capability with CMOS outputs typically reaching within millivolts of the supply rails.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered systems
• Solar-powered systems
• 4mA to 20mA current loops
• Handheld consumer products
• Medical devices

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify component authenticity through authorized distributors or Renesas Electronics Corporation channels. Confirm datasheet revision FN6154 Rev 6.00 matches the supplied documentation. Ensure the ordering suffix FBZ corresponds to the 8-lead SOIC package. Check for RoHS compliance status as indicated in the manufacturer's ordering information.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring low quiescent current alongside precision signal conditioning. The IREC feature makes it suitable for circuits where input signals may exceed the positive supply rail. Consider the 250kHz bandwidth and 39µA supply current trade-off against higher speed or lower power alternatives depending on system constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

The ISL28156FBZ belongs to the ISL28156 family of micropower precision op amps manufactured by Intersil Corporation, now part of Renesas Electronics Corporation. This specific part number denotes the 8-lead Small Outline Integrated Circuit (SOIC) package variant. The device is designed for general-purpose precision amplification in battery-operated environments.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The datasheet explicitly states 'NOT RECOMMENDED FOR NEW DESIGNS' and 'NO RECOMMENDED REPLACEMENT'. Designers should consult Technical Support for potential alternatives, but no direct substitute part numbers are provided in the official documentation.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the Enable pin function?

Pulling the ENABLE pin high (at least 2.0V) disables the device, placing the output in a high-impedance state and reducing supply current to typically 10µA. Leaving the pin open defaults to the enabled state due to an internal pull-down.

What is the Input Range Enhancement Circuit (IREC)?

IREC allows the input common-mode voltage to extend up to 0.5V beyond the positive supply rail (for a 5.0V supply) while maintaining Common-Mode Rejection Ratio (CMRR) performance.