器件名称: TMP421
功能描述:
文件大小: 644.8KB 共30页
简 介:www.ti.com
TMP421 TMP422 TMP423
SBOS398B – JULY 2007 – REVISED MARCH 2008
±1°C Remote and Local TEMPERATURE SENSOR in SOT23-8
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FEATURES
SOT23-8 PACKAGE ±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
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.
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APPLICATIONS
PROCESSOR/FPGA TEMPERATURE MONITORING LCD/DLP/LCOS PROJECTORS SERVERS CENTRAL OFFICE TELECOM EQUIPMENT STORAGE AREA NETWORKS (SAN)
+5V
TMP421
1
TMP422
1
TMP423
1 8 V+
DXP
2 2
DX1
2
DXP1 DXP2
3
SCL SDA
7 6 SMBus Controller
DXN
3
DX2
3
A1
4
DX3 A0
4 4
DXP3 DXN
GND 5
DX4
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