TMP461_16 Datasheet, PDF (1/35 Pages) Texas Instruments – High-Accuracy Remote and Local Temperature Sensor with Pin-Programmable Bus Address

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TMP461
SBOS722B – JUNE 2015 – REVISED AUGUST 2016
TMP461 High-Accuracy Remote and Local Temperature Sensor with
Pin-Programmable Bus Address
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TMP461
WQFN (10)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Block Diagram
1.7 V to 3.6 V
1.7 V to 3.6 V
Processor or ASIC
Built-In Thermal
Transistor, Diode
1
V+
10
A1
9
SCL
2
D+
3
D-
TMP461
8
SDA
ALERT/THERM2 ⁷
4
THERM
6
GND
A0
5
SMBus
Controller
Overtemperature Shutdown
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.