TMP451 Datasheet, PDF (1/27 Pages) Texas Instruments – ±1°C Remote and Local Temperature Sensor with η-Factor and Offset Correction

TMP451
www.ti.com
SBOS686 – JUNE 2013
±1°C Remote and Local Temperature Sensor with η-Factor and Offset Correction,
Series Resistance Cancellation, and Programmable Digital Filter
Check for Samples: TMP451
FEATURES
1
•23 ±1°C Accuracy for Local and Remote Diode
Sensors
• 0.0625°C Resolution for Local and Remote
Channels
• 1.7-V to 3.6-V Supply and Logic Voltage Range
• 27-µA Operating Current, 3-µA Shutdown
Current
• Series Resistance Cancellation
• η-Factor and Offset Correction
• Programmable Digital Filter
• Diode Fault Detection
• Two-Wire and SMBus™ Serial Interface
• 8-Lead WSON (WDFN) Package
APPLICATIONS
• Processor/FPGA Temperature Monitoring
• Smartphones and Tablets
• Servers, Desktops, and Notebooks
• Telecom Equipment and Storage Area
Networks (SAN)
• Automotive and Embedded Systems
DESCRIPTION
The TMP451 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 FPGAs. The temperature is
represented as a 12-bit digital code for both the local
and the remote sensors, giving a resolution of
0.0625°C. The temperature accuracy is ±1°C (max) in
the typical operating range for the local and the
remote temperature sensors. The two-wire serial
interface accepts the SMBus communication protocol.
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 TMP451 is ideal for high-accuracy temperature
measurements in a variety of consumer, computing,
industrial, automotive, and communications systems.
It 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.
1.7 V to 3.6 V
1.7 V to 3.6 V
Processor or
ASIC
Built-in Thermal
Transistor/Diode
1
V+
2
D+
3
D
TMP451
4
THERM
5
GND
8
SCL
7
SDA
ALERT / THERM2
6
SMBus
Controller
Overtemperature Shutdown
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SMBus is a trademark of Intel Corporation.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated