Radiation Hardened Ultra Low Noise, Precision Voltage Reference

Typical Diagram

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Key Features

    • Reference output voltage: 2.5V ±0.05%
    • Accuracy over temperature: ±0.15%
    • Output voltage noise: 2µVP-P Typ (0.1Hz to 10Hz)
    • Voltage accuracy over radiation: ±0.175%
    • Supply current: 930µA (Typ)
    • Tempco (box method): 10ppm/°C Max
    • Output current capability: 20mA
    • Line regulation: 8ppm/V
    • Load regulation: 2.5ppm/mA
    • Operating temperature range: -55°C to +125°C
    • Radiation environment
      • High dose rate (50-300rad(Si)/s): 100krad(Si)
      • Low dose rate (0.01rad(Si)/s): 100krad(Si)*
      • SET/SEL/SEB: 86MeV/cm2/mg*Product capability established by initial characterization. The “EH” version is acceptance tested on a wafer by wafer basis to 50krad(Si) at low dose rate.
    • Electrically screened to SMD 5962-13211


The ISL71090SEH25 is an ultra low noise, high DC accuracy precision voltage reference with a wide input voltage range from 4V to 30V. The ISL71090SEH25 uses the Intersil Advanced Bipolar technology to achieve sub 2µVP-P noise at 0.1Hz with an accuracy over temperature of 0.15%.

The ISL71090SEH25 offers a 2.5V output voltage with 10ppm/°C temperature coefficient and also provides excellent line and load regulation. The device is offered in an 8 Ld Flatpack package.

The ISL71090SEH25 is ideal for high-end instrumentation, data acquisition and applications requiring high DC precision where low noise performance is critical.


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Design Tip

Are the Schottky clamp diodes required on the outputs when not driving MOSFETs?

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