ISL28273FAZ

Instrumentation, Op Amps, Buffer Amps Overview

The ISL28273FAZ is a dual-channel micropower instrumentation amplifier optimized for single-supply operation within the +2.4V to +5.5V range. It features rail-to-rail input and output capabilities, utilizing an Input Range Enhancement Circuit (IREC) that maintains high common-mode rejection ratio (CMRR) performance even when input voltages reach the positive supply or drop to 50mV above the negative rail. Internally compensated for a minimum gain of 10, it offers a maximum offset voltage of 600µV and a typical CMRR of 110dB. The device operates from -40°C to +125°C and consumes approximately 156µA per channel.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Features an Input Range Enhancement Circuit (IREC) enabling rail-to-rail input amplification with stable CMRR across the entire common-mode voltage range.
• Provides rail-to-rail output swing capability using a Class AB complementary MOSFET output stage.
• Includes independent feedback terminals allowing precise gain setting and output zero-level adjustment without degrading CMRR.
• Incorporates Input Bias Cancellation/Compensation circuits to maintain low bias currents throughout the operating temperature range.

Instrumentation, Op Amps, Buffer Amps Applications

• Strain gauge signal conditioning
• Sensor signal conditioning in battery-powered systems
• Medical devices requiring precision measurement
• Industrial instrumentation

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package marking '28273 FAZ' corresponds to the 16-lead QSOP configuration. Confirm RoHS compliance status as the datasheet indicates Pb-free plus anneal products are compatible with both SnPb and Pb-free soldering operations. Ensure the application design accounts for the internal compensation limits, as this variant is strictly compensated for gains of 10 or higher.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the ISL28273FAZ when a gain of 10 or greater is required, distinguishing it from the ISL28270 which is compensated for gains of 100 or more. Consider its micropower consumption suitable for battery-operated environments. Verify that the input signals do not exceed the recommended differential voltage limits to prevent offset drift, as the device lacks internal clamps for differential input protection unlike other variants in the series.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the ISL2827x family of micropower instrumentation amplifiers manufactured by Renesas Electronics Corporation (formerly Intersil). The family includes the ISL28270 (dual, G>=100), ISL28273 (dual, G>=10), and ISL28470 (quad, G>=100). All share similar architectural features such as IREC and bipolar input stages but differ in internal compensation and channel count.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers: None available.