ISL28266FUZ

Instrumentation, Op Amps, Buffer Amps Overview

The ISL28266FUZ is a dual-channel micropower precision operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.4V to 5V or dual supplies of ±1.2V to ±2.5V. The device draws a typical supply current of 78µA per channel. Key electrical specifications include a gain bandwidth product of 250kHz, an input offset voltage maximum of 800µV, and an input bias current maximum of 5nA. It provides a common-mode rejection ratio of up to 110dB and operates within a temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Features Input Range Enhancement Circuit (IREC) allowing input signals to swing above the positive supply rail while maintaining high CMRR performance.
• Provides rail-to-rail input and output operation with bipolar inputs extending to the negative rail and CMOS outputs swinging near both supply rails.
• Delivers low-frequency noise performance comparable to devices with significantly higher supply currents, with a 1/f corner at 1kHz.
• Designed for ultra-low power consumption suitable for battery-operated systems, operating down to 2.4V single supply.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery- or solar-powered systems
• 4mA to 20mA current loops
• Handheld consumer products
• Medical devices
• Sensor amplifiers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package variant, as the ISL28266 series includes MSOP, SOIC, and SOT-23 options. Confirm RoHS compliance status and lead-free plating specifications required by your assembly process. Ensure the selected part number matches the exact channel count and pinout configuration needed for your PCB layout design.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when low quiescent current is critical alongside precision requirements. The dual-channel configuration eliminates the need for separate enable pins found in the single-channel version. Consider thermal resistance limits if operating at maximum ambient temperatures or driving heavy loads near the supply rails.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the ISL28x66 family of micropower RRIO op amps manufactured by Renesas Electronics (formerly Intersil). It serves as the dual-channel counterpart to the ISL28166, which includes an additional enable pin. The family is optimized for portable applications requiring extended battery life without sacrificing signal integrity.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

ISL28266FUZ-T7: Tape and reel variant of the same dual-channel MSOP device.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the IREC feature benefit circuit design?

The Input Range Enhancement Circuit allows the input voltage to exceed the positive supply rail (up to 0.5V above a 5V supply) while maintaining high Common-Mode Rejection Ratio performance, simplifying sensor interface designs.

What happens if an unused channel is left floating?

Leaving an unused channel's inputs and outputs floating can cause oscillation, leading to increased supply current and potential noise injection into the active channel. The datasheet recommends shorting the output to the negative input and grounding the positive input.