Renesas Introduces 14-bit SAR Rad Tolerant ADC for Satellites and Lunar Space Missions

Renesas Electronics Corporation, a premier supplier of advanced semiconductor solutions, has introduced 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 best in a class dynamic and static performance, including signal-to-noise ratio (SNR), the effective number of bits (ENOB), integral nonlinearity (INL), and differential non-linearity (DNL). 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. 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. 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 ISL73141SEH offers satellite and spacecraft manufacturers the ultimate in ADC performance combined with a best-in-class sensor interface signal chain. This space-graded 14-bit ADC delivers significantly better data converter performance than any other competing solution, and it is backed by six decades of leadership in radiation performance testing and characterization that gives spaceflight customers the mission assurance they demand.

The space-grade ISL73141SEH is fully characterized for enhanced low dose rate-sensitivity (ELDRS) radiation performance up to 75 krad(Si) for total ionizing dose (TID) and linear energy transfer (LET) up to 86 MeV cm2/mg for single event effects (SEE). The SEE testing also shows no single event latch-up (SEL) or single event burnout (SEB). Besides, single event transients (SETs) have also been mitigated by testing at a LET range up to 86 MeV 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.
  • 5 V supply dissipates only 60 mW.
  • High SNR of 82.1 dBFS at 5 V supply operation.
  • Operating from a 3.3 V supply at 750-KSPS dissipates only 28 mW.
  • Single supply operation simplifies system design.
  • The 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.

Click here to learn more about the ISL73141SEH.