STMicroelectronics RHRDAC121 radiation-hardened digital-to-analog converter

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The STMicroelectronics RHRDAC121 radiation-hardened digital-to-analog converter (DAC) operates down to 2.5 V for use in modern, low-power system designs that older 3.3 V parts cannot support.

Consuming just 0.6 mW at its maximum speed and supply voltage, the 12-bit, 1 Msps successive-approximation register (SAR) DAC helps reduce size, weight and power (SWaP) in next-generation satellites. Typically used in circuits for telemetry, housekeeping and precision sensor-gain adjustment, its features include an SPI-compatible serial output, internal voltage reference and automatic power-on-reset to zero-volt output. These should enable high precision with minimal external components, saving circuit complexity and board area.

Maintaining stable performance parameters in harsh conditions up to 100 krad(Si) total ionising dose (TID), the product is single-event latch-up (SEL) free up to 125 MeV.cm²/mg. It is characterised for single-event transient (SET) and single-event upset (SEU) and ready for immediate deployment with no further upscreening required.

The device is QML-V qualified and comes in a hermetic ceramic package with gold or solder-dipped leads. It is also available as bare die. Designed and manufactured in Europe, it leverages ST’s 130 nm pure CMOS technology and processes used over 45 years serving the space industry. Its development has been funded by CNES (Centre National d’Etudes Spatiales), the French Space Agency.

For more information: www.st.com/rad-hard-converters.