1 Features
• Remote diode temperature sensor accuracy: ±1°C
• Local temperature sensor accuracy: ±1°C
• Resolution for local and remote channels:
0.0625°C
• Supply and logic voltage range: 1.7V to 3.6V
• 35μA operating current (1 SPS), 3μa 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
• 10-Lead VSSOP package
• Supports defense, aerospace, and medical
applications
– Military temperature range (–55°C to 125°C)
– Controlled baseline
– One fabrication, assembly, and test site
– Extended product life cycle
– Wafer lot traceability

2 Applications
• Processor Temperature Monitoring
• Aerospace and defense; ruggedized
communication
• Avionics
• Sensors, imaging, and radar; electronic warfare;
radar
• Seeker front end

3 Description
The TMP461-EP device is a 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,
microcontrollers, or field-programmable gate arrays
(FPGAs). 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-EP is ideal for multi-location, highaccuracy
temperature measurements in a variety
of communication, computing, instrumentation, and
industrial applications. The device is specified for
operation over a supply voltage range of 1.7V to 3.6V,
and a temperature range of –55°C to 125°C.