1 Features
1• Remote Diode Temperature Sensor Accuracy:
±0.75°C
• Local Temperature Sensor Accuracy: ±1°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
• 10-Lead WQFN Package

2 Applications
• Processor Temperature Monitoring
• Telecommunication Equipment
• Servers and Personal Computers
• Precision Instruments
• Test Equipment
• Smart Batteries
• Embedded Applications
• LED Lighting Thermal Control

3 Description
The TMP461 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 is ideal for multi-location, high-accuracy
temperature measurements in a variety of
communication, computing, instrumentation, and
industrial applications. The device is specified for
operation over a supply voltage range of 1.7 V to
3.6 V, and a temperature range of –40°C to 125°C.