14bit ADC at 1MSPS is radiation hard

December 01, 2020 //By Peter Clarke
14bit ADC at 1MSPS is radiation hard
Intersil, part of Renesas, has launched a single-chip 14bit successive-approximation-register (SAR) analog-to-digital converter (ADC) for rad-hard space applications.

The part number is ISL73141SEH and the ADC fully resets after every sample, clearing any errors that result from a single event upset (SEU) due to heavy ion radiation during spaceflight.

The ISL73141SEH is one of the key signal-path building blocks in long duration geosynchronous / geostationary Earth orbit (GEO) communication satellites and manned spacecraft, including lunar space missions.

The ISL73141SEH ADC is one of seven ICs, including rad-hard temperature sensor, multiplexer, quad op amp, ADC driver, LDO and voltage reference to form a complete sensor interface signal chain solution that accelerates telemetry, tracking, and control and flight computer system development.

The space-grade ISL73141SEH is characterized for enhanced low dose rate-sensitivity radiation performance up to 75krad(Si) for total ionizing dose (TID) and linear energy transfer (LET) up to 86MeVcm2/mg for single event effects (SEE).

Key Features of the ISL73141SEH

1-MSPS throughput rate with no data latency and no missing codes

5V supply, dissipates only 60mW

High SNR of 82.1dBFS at 5V supply operation

Operating from a 3.3V supply at 750-KSPS, dissipates only 28mW

Single supply operation simplifies system design

Highest dynamic performance of 13.3 ENOB, enabling > 12-bit resolution

Superior linearity: ±0.5 LSB INL and ±0.2 LSB DNL

Full military temperature range of -55°C to +125°C

The components connects through an SPI interface to MPUs, MCUs, and/or FPGAs to digitize sensor signals.

The ISL73141SEH is available now in a 14-lead ceramic dual flatpack package. An evaluation board is available for evaluating device features and performance.

Related links and articles:

www.renesas.com

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