TMP451-Q1_15 Datasheet, PDF (1/34 Pages) Texas Instruments – TMP451-Q1 ±1°C Remote and Local Temperature Sensor with η-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter

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TMP451-Q1
SLOS877 – OCTOBER 2014
TMP451-Q1 ±1°C Remote and Local Temperature Sensor with η-Factor and Offset
Correction, Series-Resistance Cancellation, and Programmable Digital Filter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• ±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
2 Applications
• Automotive Infotainment Systems
• ECU Processor Temperature Monitoring
• TCM Processor Temperature Monitoring
• BCM Processor Temperature Monitoring
• LED Headlight Thermal Control
3 Description
The TMP451-Q1 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 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 (maximum) 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-Q1 device is ideal for multi-location,
high-accuracy temperature measurements in a
variety of automotive sub-systems. 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)
TMP451-Q1
WSON (8)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
1.7V to 3.6V
1.7V to 3.6V
Processor or
ASIC
Built-in Thermal
Transistor/Diode
2
DXP
1
V+
8
SCL
3
DXN
TMP451-Q1
4
THERM
7
SDA
5
GND
ALERT / THERM2
6
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.