STMicroelectronics' RHRDAC121 radiation-resistant digital-to-analog converter (DAC) operates up to 2.5V for use in modern, low-power system designs that older 3.3V parts cannot handle.
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 precision sensor telemetry, maintenance, and gain adjustment, its features include an SPI-compatible serial output, internal voltage reference, and automatic reset to zero volt output. This ensures high precision with minimal external components, saving circuit complexity and board area.
Maintaining stable performance parameters in harsh conditions of up to 100 krad(Si) total ionizing dose (TID), the RHRDAC121 is free from single event latch (SEL) — up to 125 MeV.cm²/mg. It is characterized by single-event transients (SET) and single-event upsets (SEU) and is ready for immediate deployment without the need for additional screening.
The RHRDAC121 is QML-V qualified and comes in an airtight ceramic package with gold or solder wires. It is also available as a simple matrix. Designed and manufactured in Europe, it leverages ST's 130nm pure CMOS technology and processes proven over 45 years serving the space industry. The development of the CAD was funded by CNES (Centre National d'Etudes Spatiales), the French Space Agency.
