Overview

The ISL28191 and ISL28291 are tiny single and dual ultra-low noise, ultra-low distortion operational amplifiers. They are fully specified to operate down to +3V single supply. These amplifiers have outputs that swing rail-to-rail and an input common mode voltage that extends to ground (ground sensing).

The ISL28191 and ISL28291 are unity gain stable with an input referred voltage noise of 1.7nV/√Hz. Both parts feature 0.00018% THD+N at 1kHz.

The ISL28191 is available in the space-saving 6 Ld UTDFN (1.6mmx1.6mm) and 6 Ld SOT-23 packages. The ISL28291 is available in the 8 Ld SOIC, 10 Ld 1.8mmx1.4mm UTQFN and 10 Ld MSOP packages. All devices are guaranteed over -40°C to +125°C.

ISL28191_ISL28291 Functional Diagram
ISL28191_ISL28291 Functional Diagram
  • 1.7nV/√Hz input voltage noise at 1kHz
  • 1kHz THD+N typical 0.00018% at 2VP-P VOUT
  • Harmonic Distortion -76dBc, -70dBc, fo = 1MHz
  • 61MHz -3dB bandwidth
  • 630µV maximum offset voltage
  • 3µA input bias current
  • 100dB typical CMRR
  • 3V to 5.5V single supply voltage range
  • Rail-to-rail output
  • Ground Sensing
  • Enable pin (not available in the 8 Ld SOIC package option)
  • Pb-free (RoHS compliant)

Applications

  • Low noise signal processing
  • Low noise microphones/preamplifiers
  • ADC buffers
  • DAC output amplifiers
  • Digital scales
  • Strain gauges/sensor amplifiers
  • Radio systems
  • Portable equipment
  • Infrared detectors

Documentation

Design & Development

ISL28191EVAL1Z Ultra-Low Noise RRIO Op Amp Eval Board

ISL28191EVAL1Z

Evaluation
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Single Supply, Ultra-Low Noise, Low Distortion, Rail-to-Rail Output Op Amp Evaluation Board

The ISL28191EVAL1Z is designed to enable the IC to operate from a single supply (+3VDC to +5.5VDC) or from split supplies (±1.5VDC to ±2.75VDC). The board is configured...

Featured Documents:
ISL2819xEVAL1Z User Guide
MCK-RA6T2

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MCK-RA6T2 Renesas Flexible Motor Control Kit for RA6T2 MCU Group

The MCK-RA6T2 is a development kit that enables easy evaluation of motor control using permanent magnet synchronous motors (brushless DC motors). With this product and...

Featured Documents:
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MCI-LV-1

RTK0EM0000S04020BJ

Development
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MCI-LV-1 Renesas Flexible Motor Control Inverter Board – Low Voltage 48V/10A for Three-Phase BLDC/PMSM Motor

The MCI-LV-1 is a motor control inverter board that enables easy evaluation of motor control using permanent magnet synchronous motors (brushless DC motors). By using...

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ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

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    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
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    Part Number
    ISL28191FHZ-T7
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    		SOT23 Reel 3 1 Get Samples,
    ISL28191FRUZ-T7
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    Samples Available
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    		uTDFN Reel 1 1.172 Get Samples,
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