Intersil expands Radiation Hardened Voltage References | Automation.com

Intersil expands Radiation Hardened Voltage References

Intersil expands Radiation Hardened Voltage References

July 14, 2014 – Intersil expanded its line of radiation hardened (rad hard) voltage references to include four devices, the ISL71091SEH10, 20, 33 and 40. Providing voltages previously unavailable for the rad hard space market, the new family enables better overall accuracy for 11-bit and 12-bit ADC resolution applications. The ISL71091SEH family offers a reference voltage that is stable over time, temperature and ionizing radiation, providing increased precision in satellite data acquisition, signal processing and power management applications.

Customers designing for rigorous applications require reliable precision analog solutions to obtain better overall accuracy. The ISL71091SEH20 provides a 2.048 voltage reference specifically for commonly used 11-bit ADC resolution, and the ISL71091SEH40 provides a 4.096 voltage reference specifically for 12-bit ADC resolution. Both devices provide a reference voltage consistent with 1mV LSB.  These voltage reference options enable the system designer to optimize accuracy within 11 and 12-bit signal processing system resolution targets, respectfully, ensuring signal processing integrity.

The ISL71091SEH radiation hardened voltage references are deliver high performance by leveraging Intersil’s innovative SOI-based PR40 process providing Single Event Latch-up (SEL) immunity to ensure robust performance in heavy ion environments. This and other Intersil patented technologies reduce performance compromises in even the most challenging applications. This advanced bipolar technology enables the ISL71091SEH family to achieve very low output noise with an initial voltage accuracy of 0.05%.  The ISL71091SEH devices provide industry leading voltage accuracy as well, +/-0.15% over temperature (-55C to +125C) and +/-0.25% ionizing radiation.

The ISL71091SEH devices, available in the smallest surface mount leaded package available also reduce overall solution size. Sinking capability on chip eliminates the need for buffering, which reduces system complexity while also increasing overall system accuracy.

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Features and Specifications

  • ISL71091SEHVF40: 4.096V with an input voltage range from 6 to 30V, typical 6.2µVp-p 0.1Hz to 10Hz and 6.6µVrms 10Hz to 1kHz output noise with an initial voltage accuracy of 0.05%
  • ISL71091SEHVF33: 3.3V with an input voltage range from 4.6 to 30V, typical 5uVp-p (3.3Vout) 0.1Hz to 10Hz noise with an initial voltage accuracy of 0.05%
  • ISL71091SEHVF20: 2.048V with an input voltage range from 4.2 to 30V, typical 3.8µVp-p 0.1Hz to 10Hz and 3.4µVrms 10Hz to 1kHz output noise with an initial voltage accuracy of 0.05%
  • ISL71091SEHVF10: 10V with an wide input voltage range from 12 to 30V, typical 14.8µVp-p 0.1Hz to 10Hz and 14.7µVrms 10Hz to 1kHz output noise with an initial voltage accuracy of 0.05%
  • Industry leading voltage accuracy: +/-0.15% over temperature (-55C to +125C) and ±0.25% ionizing radiation (50krad(Si) low dose rate, 100krad(Si) high dose rate)
  • Provides a very low temperature coefficient of 6ppm/ºC and has excellent line and load regulation to ensure accuracy is maintained over variations in input voltage and load current.
  • Sources 10mA and sinks 5mA

Pricing and Availability
The ISL71091SEH voltage references (4.096V, 3.3V, 2.048V and 10V) are available now in a compact 8-lead flatpack. Two evaluation boards are available with two voltage options, the ISL71091SEH12EV1Z for 1.25V and the ISL71090SEH25EV1Z for 2.5V.  

 

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