TMP421AQDCNRQ1

1 Features

• AEC-Q100 Qualified with the Following Results

– Temperature Grade 1: –40°C to +125°C 

– Device HBM ESD Classification Level 2 

– Device CDM ESD Classification Level C5

• SOT23-8 Package

• ±1°C Remote Diode Sensor (Maximum)

• ±1.5°C Local Temperature Sensor (Maximum)

• Series Resistance Cancellation

• n-Factor Correction

• Two-Wire I2C or SMBus™ Compatible Serial Interface

• Multiple Interface Addresses

• Diode Fault Detection

• RoHS Compliant and No Sb/Br

2 Applications

• Processor and FPGA Temperature Monitoring

• LCD, DLP, and LCOS Projectors

• Servers

• Central Office Telecom Equipment

• Storage Area Networks (SAN)

3 Description

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 devices are single, dual, and triple remote, automotive-qualified 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 field-programmable gate arrays (FPGAs).

Remote accuracy is ±1°C for multiple device manufacturers, with no calibration needed. The twowire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1include series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 are all available in an 8-pin SOT-23 package.

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