ISL71091SEHx Product Family
Radiation Hardened Ultra Low Noise, Precision Voltage References

Products Vout
Output voltage noise
Load Regulation
ISL71091SEH20 2.048 6 3.8 40
ISL71091SEH33 3.3 6 5.2 25
ISL71091SEH40 4.096 6 6.2 20
ISL71091SEH10 10.0 6 14.8 15


Rad Hard Voltage References


The ISL71091SEH20, ISL71091SEH33ISL71091SEH40 and ISL71091SEH10 are ultra low noise, high DC accuracy precision voltage references with wide input voltage ranges. The ISL71091SEH family uses Intersil's advanced bipolar technology to achieve ultra low noise with an initial voltage accuracy of 0.05%. The device is offered in an 8 Ld Flatpack package.

The ISL71091SEH family is ideal for high-end instrumentation, data acquisition and processing applications requiring high DC precision where low noise performance is critical.


  • Precision voltage sources for data acquisition system for space applications
  • Strain and pressure gauge for space applications
  • Radiation hardened PWM requiring precision outputs


  • Reference output voltage 2.048V, 3.3V, 4.096V and 10.0V at ±0.05%
  • Accuracy over temperature ±0.15%
  • Accuracy over radiation ±0.25%
  • Output voltage noise 
    • 3.8µVP-P typ (0.1Hz to 10Hz)
    • 5.2µVP-P typ (0.1Hz to 10Hz)
    • 6.2µVP-P typ (0.1Hz to 10Hz)
    • 14.8µVP-P typ (0.1Hz to 10Hz)
  • Supply current 300µA (Typ)
  • VOS temperature coefficient 6ppm/°C Max.
  • Output current capability 10mA/-5mA
  • Line regulation 5ppm/V Max.
  • Load regulation (Sourcing) 
    • 40ppm/mA Max
    • 25ppm/mA Max
    • 20ppm/mA Max
    • 15ppm/mA Max
  • Operating temperature range -55°C to +125°C
  • Radiation environment
    • High dose rate (50 to 300rad(Si)/s):  100krad(Si)
    • Low dose rate (0.01rad(Si)/s):  100krad(Si)*
    • SEL/SEB free (VCC = 36V): 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 5962-14208



Evaluation Kits Available for ISL71091SEHx Voltage References

The ISL71091SEHxxEV1Z evaluation boards are designed to measure the performance of the radiation hardened ultra low noise, high precision ISL71091SEH voltage reference family. 

Get an Evaluation Board »


Family Description
ISL71090SEHx Radiation Hardened Ultra Low Noise, Precision Voltage References


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