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TMP431DDGKT Fiches technique(PDF) 11 Page - Texas Instruments

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No de pièce TMP431DDGKT
Description  Temperature Sensor
Download  47 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TMP431DDGKT Fiches technique(HTML) 11 Page - Texas Instruments

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SCL
SDA
THERM
DXP
DXN
V+
GND
ALERT/THERM2
ADC
Control Logic
Register Bank
Serial Interface
Oscillator
Voltage Regulator
Current Sources
Local
Temperature
Sensor
Signal
Conditioning
TMP431, TMP432
www.ti.com
SBOS441G – SEPTEMBER 2009 – REVISED DECEMBER 2015
8 Detailed Description
8.1 Overview
The TMP431 (two-channel) and TMP432 (three-channel) are digital temperature sensors that combine a local die
temperature measurement channel and a remote junction temperature measurement channel in a single
VSSOP-8 (TMP431) or VSSOP-10 (TMP432) package. They are Two-Wire- and SMBus interface-compatible
and are specified over a temperature range of –40°C to 125°C. The TMP43x contain multiple registers for
holding configuration information, temperature measurement results, temperature comparator maximum and
minimum limits, and status information. User-programmed high and low temperature limits stored in the TMP43x
can be used to trigger an overtemperature and undertemperature alarm (ALERT) on local and remote
temperatures. Additional thermal limits can be programmed into the TMP43x and used to trigger another flag
(THERM) that can be used to initiate a system response to rising temperatures.
For proper remote temperature sensing operation, the TMP431 requires only a transistor connected between
DXP and DXN; the TMP432 requires transistors conncected between DXP1 and DXN1, and between DXP2 and
DXN2.
The SCL and SDA interface pins require pullup resistors as part of the communication bus, while ALERT and
THERM are open-drain outputs that also need pullup resistors. ALERT and THERM may be shared with other
devices if desired for a wired-OR implementation. TI recommends a 0.1-
μF power-supply bypass capacitor for
good local bypassing.
8.2 Functional Block Diagram
Copyright © 2009–2015, Texas Instruments Incorporated
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Product Folder Links: TMP431 TMP432


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