SBAA706 May   2026 ADC128S102-SEP , ADC128S102QML-SP , ADC168M102R-SEP , ADS1278QML-SP , ADS1282-SP , INA901-SP , LMP7704-SP , OPA4H014-SEP , OPA4H199-SEP , OPA4H199-SP , TMUX182-SEP

 

  1.   1
  2.   Abstract
  3. 1Introduction
  4. 2Multi-Channel Temperature Monitoring with ADS1278QML-SP
  5. 3High-Speed Housekeeping with ADC128S102QML-SP
  6. 4Precision Bridge Sensor Interface with ADS1282-SP
  7. 5Photodiode Signal Measurement with ADC168M102R-SEP
  8. 6Precision RTD Measurement with ADS1282-SP
  9. 7Motor Position Feedback Measurement Using ADC168M102R-SEP
  10. 8Summary
  11. 9References

3 High-Speed Housekeeping with ADC128S102QML-SP

Satellite housekeeping circuits continuously monitor the health of onboard power systems, reporting voltages, currents, and temperatures to the central data handling system. This design implements a multi-parameter telemetry front end using the ADC128S102QML-SP and the LMP7704-SP. The INA901-SP serves as the analog front end for high-side current and voltage measurements. Temperature measurements are taken via additional channels using thermistors or diode-based sensors buffered by the LMP7704-SP.

The ADC128S102QML-SP is a QML Class V, radiation-hardened, 12-bit SAR ADC with eight multiplexed input channels and a maximum sample rate of 1MSPS. The 100 krad (Si) TID rating and SEL immunity to 120MeV·cm²/mg make it one of the most radiation-robust converters available for space housekeeping applications.

Telemetry with ADC128S102QML-SPFigure 3-1 Telemetry with ADC128S102QML-SP