New INTERSIL 14-Bit 1-MSPS ADC Delivers Best-in-Class Radiation-Hardened Performance

INTERSIL/RENESAS just announced the industry’s highest performance single-chip 14-Bit, 1-MSPS successive-approximation-register (SAR) analog-to-digital converter (ADC) for radiation-hardened (rad-hard) space applications.

Renesas’ Intersil brand ISL73141SEH delivers the best in the class dynamic and static performance. Firstly, this includes signal-to-noise ratio (SNR), the effective number of bits (ENOB), integral nonlinearity (INL), and differential non-linearity (DNL). Secondly, the ADC fully resets after every sample. How? Clearing any errors that result from a single event upset (SEU) due to heavy-ion radiation during spaceflight.

Speaking of space missions, 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 missions. By delivering the industry’s best dynamic and static performance, the new 14-bit ADC accurately captures real-world analog transmissions and converts them for processing in the digital domain. As a result, the ISL73141SEH ADC is one of seven ICs, including a 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 (TT&C) and flight computer system development.

The space-grade ISL73141SEH is fully characterized for enhanced low dose rate sensitivity (ELDRS) radiation performance up to 75krad(Si) for total ionizing dose (TID) and linear energy transfer (LET) up to 86MeV*cm2/mg for single event effects (SEE). Additionally, the SEE testing shows no single event latch-up (SEL) or single event burnout (SEB). In addition, single event transients (SETs) have also been mitigated by testing at a LET range up to 86MeV*cm2/mg.


Key Features of the ISL73141SEH 14-Bit, 1-MSPS SAR ADC

  • 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

Sensor Interface Signal Chain for TT&C and Flight Computer

The ISL73141SEH 14-Bit, 1-MSPS SAR ADC is at the heart of the sensor interface signal chain and connects via SPI interface to MPUs, MCUs, and/or FPGAs to digitize sensor signals in digital TT&C subsystems and flight computers. System designers are able to build the entire signal chain with Renesas’ Intersil brand analog and power ICs, including ISL71590SEH temperature sensor; ISL70444SEH quad op amp; ISL71830SEH 16-channel low voltage multiplexer; ISL70517SEH instrumentation amp with ADC driver; ISL75052SEH high voltage LDO regulator; and ISL71091SEH40 precision, low-noise voltage reference.


In conclusion, the ISL73141SEH 14-bit, 1-MSPS SAR ADC is available now in a 14-lead ceramic dual flatpack package. An evaluation board is available for evaluating device features and performance. For more information, please visit

If you want to know about the new ongoing development of the ADC family (8 channels ADC, Rad tolerant in plastic variant, and others) and/or if you have any questions, please contact us