TMP421

BurrĆBrown Products from Texas Instruments TMP421 TMP422 SBOS398A – JULY 2007 – REVISED SEPTEMBER 2007 ±1°C Remote and Local TEMPERATURE SENSOR in SOT23-8 1 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 and TMP422 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 and TMP422 include series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection. The TMP421 and TMP422 are both available in an 8-lead, SOT23 package. 2345 APPLICATIONS PROCESSOR/FPGA TEMPERATURE MONITORING LCD/DLP®/LCOS PROJECTORS SERVERS CENTRAL OFFICE TELECOM EQUIPMENT STORAGE AREA NETWORKS (SAN) V+ 8 5 V+ GND N-Factor Correction Status Register TMP421 Configuration Register V+ 8 5 V+ GND N-Factor Correction Status Regist...