ISL28470FAZ

Overview

The ISL28470FAZ is a quad-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, maintaining high CMRR performance even when input voltages reach the positive supply or drop to 50mV above the negative rail. The device incorporates an Input Range Enhancement Circuit (IREC) and bipolar input devices for low offset voltage and excellent noise performance. Internally compensated for a minimum gain of 100, it delivers a typical CMRR of 110dB and a -3dB bandwidth of 240kHz at G=100.

Feature Summary

• Quad-channel architecture providing four independent instrumentation amplifiers in a single package
• Rail-to-rail input and output functionality enabled by Input Range Enhancement Circuit (IREC)
• Bipolar input stage design ensuring low offset voltage and superior 1/f noise characteristics
• Independent feedback terminals allowing precise gain setting and output zero-level adjustment

Applications

• Battery or solar-powered systems requiring low quiescent current
• Strain gauge signal conditioning circuits
• Medical device sensor interfaces
• Industrial instrumentation data acquisition

Procurement Notes

Verify that the specific FAZ suffix corresponds to the 28-lead QSOP package configuration as documented in the official datasheet ordering information. Confirm RoHS compliance status and Pb-free reflow profile requirements prior to integration into manufacturing processes. Ensure compatibility with standard surface-mount assembly techniques for the specified package type.

Selection Notes

Select this component when multiple isolated measurement channels are required within a compact footprint. The internal compensation for gains of 100 or higher simplifies circuit design compared to uncompensated alternatives. Consider the single-supply capability and wide common-mode input range for applications where dual supplies are unavailable or undesirable.

Part Context

This device belongs to the pinPOINT precision analog product line originally developed by Intersil, which was subsequently acquired by Renesas Electronics Corporation. The ISL28470 represents the quad-channel variant within a family that also includes dual-channel versions like the ISL28270 and ISL28273, sharing similar core architectural features but differing in channel count and specific compensation settings.

Replacement Considerations

Public confirmed substitute part numbers: None.