STMicroelectronics RHRDAC1612 rad-hard high resolution DAC

The RHRDAC1612 is a very low-noise, low-frequency, radiation hardened DAC optimized to operate in a bandwidth up to 3 kHz. This DAC has a sigma-delta architecture which provides superior linearity performance and features a very good signal-to-noise ratio of 96 dB@3 kHz.

The DAC operates with a standard SPI input data which it converts into single-ended, internally-filtered voltage outputs. The SPI interface allows write and read mode implementations.

Specifically designed to optimize precision over power consumption, the RHRDAC1612 only dissipates 15 mW at 12 ksps clocking.

Key features

• ΣΔ DAC
• 16-bit resolution at 3 kHz bandwidth
• External master clock: 2.4 to 3.6 MHz
• Internal master clock: 3 MHz

Additional features

• Sampling frequency: 12 ksps at 3 MHz master clock
• Serial peripheral interface (SPI)
• Selectable input format: straight binary or two’s complement
• Internally filtered, single-ended output voltage
• Output feedback pin dedicated for high precision sensing
• 1.8 V/3.3 V digital interfaces
• 3 V to 3.6 V analog supply
• Compatible with the RHF100 1.2 V Vref
• Power-down mode
• 100 krad MIL-STD-883 1019.7
• SEL immune (up to 120 MeV.cm²/mg)
• SEU characterized

Applications

• Space applications
• Telemetry
• Interferometry
• High-accuracy instrumentation