TMP461-SP Radiation-hardness-assured (RHA), high-accuracy remote and local temperature sensor |

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Radiation-hardness-assured (RHA), high-accuracy remote and local temperature sensor



The TMP461-SP device is a radiation-hardened, high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, analog-to-digital converters (ADC), digital-to-analog converters (DAC), microcontrollers, or field-programmable gate arrays (FPGA). Temperature is represented as a 12-bit digital code for both local and remote sensors, giving a resolution of 0.0625°C. The two-wire serial interface accepts the SMBus communication protocol with up to nine different pin-programmable addresses.

Advanced features such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter, are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.

The TMP461-SP is ideal for multi-location, high-accuracy temperature measurements in a variety of distributed telemetry applications. The integrated local and remote temperature sensors simplify spacecraft housekeeping activities by providing an easy way of measuring temperature gradients. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V, and a temperature range of –55°C to 125°C.


  • QMLV Qualified: 5962R-1721801VXC
    • Thermally Enhanced HKU Package
    • Radiation-Hardness-Assured (RHA) up to Total Ionizing Dose (TID) 100 krad(Si) at low dose rate (LDR) of 10 mrad/s
    • Single Event Latchup (SEL) Immune to 76 MeV·cm2/mg at 125°C
    • 10-Lead HKU Ceramic Package
  • Remote Diode Temperature Sensor Accuracy: ±1.5°C (Across Extended Temperature Range of [–55°C to 125°C])
  • Local Temperature Sensor Accuracy: ±2°C (Across Extended Temperature Range of [–55°C to 125°C])
  • Enables Measurement Of Remote Diode Temperatures in the Range of –64°C to 191°C
  • Resolution for Local and Remote Channels: 0.0625°C
  • Supply and Logic Voltage Range: 1.7 V to 3.6 V
  • 35-µA Operating Current (1 SPS),
    3-µA Shutdown Current
  • Series Resistance Cancellation
  • η-Factor and Offset Correction
  • Programmable Digital Filter
  • Diode Fault Detection
  • Two-Wire and SMBus™ Serial Interface Compatible with Pin-Programmable Address

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Part number Order Device type Interface Local sensor accuracy (Max) (+/- C) Temp resolution (Max) (bits) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Features Remote channels (#) Addresses Rating Package Group Package size: mm2:W x L (PKG)
TMP461-SP Order now Remote     I2C, SMBus, 2-Wire     2     12     -55 to 125
25 to 25    
1.7     3.6     2     ALERT     1     9     Space     CFP | 10     10CFP: 45 mm2: 6.48 x 7.02 (CFP | 10)