1 Features
1• 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

2 Applications
• Spacecraft FPGA, ADC's, DAC's, and ASIC
Temperature Monitoring
• Spacecraft Housekeeping and Telemetry

3 Description
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, highaccuracy
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.