ISL55191IBZ

Overview

The ISL55191IBZ is a single-channel ultra-low noise, ultra-low distortion operational amplifier manufactured by Renesas Electronics Corporation (formerly Intersil). It features an 8-lead SOIC package and operates on a single supply voltage ranging from +3V to +5.5V. The device delivers a gain-bandwidth product of 800MHz at a gain of 10, with a slew rate of 260V/µs. Key electrical specifications include an input-referred voltage noise of 1.3nV/√Hz, a maximum input offset voltage of 800µV, and a quiescent supply current of 6.1mA per amplifier. It supports rail-to-rail output swing and includes an enable pin for power-down mode.

Feature Summary

• Ultra-low noise performance with 1.3nV/√Hz input voltage noise density
• High-speed operation featuring 800MHz gain bandwidth product and 260V/µs slew rate
• Rail-to-rail output drive capability with ground-sensing input common-mode range
• Low-power shutdown mode reducing supply current to 21µA via logic control

Applications

• High speed pulse applications
• Low noise signal processing
• ADC buffers
• DAC output amplifiers
• Radio systems

Procurement Notes

Verify the manufacturer origin as the component was originally produced by Intersil before its acquisition by Renesas Electronics Corporation. Confirm that the specific ordering suffix IBZ corresponds to the 8-lead SOIC package variant. Ensure compatibility with RoHS compliance standards and Pb-free annealing processes specified in the datasheet documentation.

Selection Notes

Select this component for designs requiring high-speed signal conditioning with minimal noise contribution. The 800MHz bandwidth and low distortion make it suitable for RF and communication interfaces. Consider the 6.1mA active current consumption against the 21µA shutdown state for battery-powered portable equipment applications where power management is critical.

Part Context

This part belongs to the ISL55191/ISL55291 family of voltage feedback operational amplifiers designed for imaging and communication applications. The ISL55191 represents the single-channel version, while the ISL55291 offers dual channels. Both share identical electrical characteristics but differ in channel count and package options.

Replacement Considerations

Public confirmed substitute part numbers include ISL55190 and ISL55290.

FAQ

How does the enable logic function for the ISL55191?

The ISL55191 uses an internal pull-up on the EN pin. Logic '1' (voltage > 2V) enables the amplifier, while Logic '0' (voltage < 0.8V) disables it, placing the output in a high impedance state.

What is the input common-mode voltage range?

The input common-mode voltage range includes ground (0V) and extends up to approximately 3.8V when operating from a 5V supply.