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.