TMP421 Datasheet, PDF (1/34 Pages) Burr-Brown (TI) – ±1°C Remote and Local TEMPERATURE SENSOR in SOT23-8

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TMP421
TMP422
TMP423
SBOS398C – JULY 2007 – REVISED MAY 2012
±1°C Remote and Local TEMPERATURE SENSOR
Check for Samples: TMP421, TMP422, TMP423
FEATURES
1
•234 SOT23-8 and DSBGA (WCSP) PACKAGES
• ±1°C REMOTE DIODE SENSOR (MAX)
• ±1.5°C LOCAL TEMPERATURE SENSOR (MAX)
• SERIES RESISTANCE CANCELLATION
• n-FACTOR CORRECTION
• TWO-WIRE/ SMBus™ SERIAL INTERFACE
• MULTIPLE INTERFACE ADDRESSES
• DIODE FAULT DETECTION
• RoHS COMPLIANT AND NO Sb/Br
APPLICATIONS
• PROCESSOR/FPGA TEMPERATURE
MONITORING
• LCD/ DLP^®/LCOS PROJECTORS
• SERVERS
• CENTRAL OFFICE TELECOM EQUIPMENT
• STORAGE AREA NETWORKS (SAN)
DESCRIPTION
The TMP421, TMP422, and TMP423 are remote
temperature sensor monitors with a built-in local
temperature sensor. The remote temperature sensor
diode-connected transistors are typically low-cost,
NPN- or PNP-type transistors or diodes that are an
integral part of microcontrollers, microprocessors, or
FPGAs.
Remote accuracy is ±1°C for multiple IC
manufacturers, with no calibration needed. The two-
wire serial interface accepts SMBus write byte, read
byte, send byte, and receive byte commands to
configure the device.
The TMP421, TMP422, and TMP423 include series
resistance cancellation, programmable non-ideality
factor, wide remote temperature measurement range
(up to +150°C), and diode fault detection.
The TMP421, TMP422, and TMP423 are all available
in a SOT23-8 package. The TMP421C is also
available in a DSBGA (WCSP) package.
TMP421
1
DXP
2
DXN
3
A1
4
A0
1 Channel Local
1 Channel Remote
TMP422
1
DX1
2
DX2
3
DX3
4
DX4
1 Channel Local
2 Channels Remote
TMP423
1
DXP1
2
DXP2
3
DXP3
4
DXN
1 Channel Local
3 Channels Remote
+5V
8
V+
7
SCL
6
SDA
GND
5
SMBus
Controller
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.
DLP is a registered trademark of Texas Instruments.
2
SMBus is a trademark of Intel Corporation.
3
All other trademarks are the property of their respective owners.
4
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 © 2007–2012, Texas Instruments Incorporated