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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 is a Sigma-Delta (Σ∆) 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, and converts it into a single-ended internally filtered voltage output. SPI interface allows write and read modes implementation.

Specifically designed to optimize precision over power consumption, the RHRDAC1612 only dissipates 20 mW at 12 ksps clocking. The device employs a variety of radiation hardening strategies and the usage of radiation tolerant standard cells and techniques at layout level.

The RHRDAC1612 has an operating temperature range of -55 °C to +125 °C and is available in a Flat 24-pin ceramic package.

Key Features

• Σ∆ DAC
• 16-bit resolution at 3 kHz bandwidth
• Designed to fit with 1.2 V voltage reference RHF100
• External master clock: 2.4 to 3.6 MHz
• Internal master clock: 3 MHz
• Sampling frequency: 12 ksps at 3 MHz master clock
• Serial peripheral interface (SPI)
• Selectable input format: straight binary or Two's complement
• Single ended output voltage externally filtered
• Output feedback pin dedicated for high precision sensing
• 1.8 V/3.3 V digital interfaces
• 3 V to 3.6 V analog supply
• 15 mW power consumption
• Power down mode
• 100 krad MIL-STD-883 1019.7
• SEL immune (up to 120 MeV.cm²/mg)
• SEU characterized

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