TMP422

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Dual Remote and Local Temperature Sensor with N-Factor and Series-R Correction in WCSP

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 2.5 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 38 Temp resolution (Max) (bits) 12 Features One-shot conversion Remote channels (#) 2 Addresses 4 Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

SOT-23 (DCN) 8 8 mm² 2.9 x 2.8 open-in-new Find other Digital temperature sensors

Features

  • 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
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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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet ±1°C Remote and Local Temperature Sensor datasheet (Rev. C) May 07, 2012
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
1249
Description
The ONET1130EC is a 2.5-V integrated modulator driver and limiting amplifier with transmit and receive clock and data recovery (CDR) designed to operate between 9.80 Gbps and 11.7 Gbps without the need for a reference clock. The ONET1130EC-EVM is a printed-circuit board (PCB) created to help (...)
Features
  • SMA connectors included
  • Ready to install TOSA connectors
  • Read and write ONET1131 registers through USB 
  • Configurable through jumpers

Software development

DRIVER OR LIBRARY Download
Linux Driver for TMP421
TMP421SW-LINUX The Linux driver supports the TMP421 series of Remote and Local Temp Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • (...)

Design tools & simulation

SIMULATION MODEL Download
SBOM410A.ZIP (60 KB) - IBIS Model
GERBER FILE Download
SBOC594A.ZIP (695 KB)

CAD/CAE symbols

Package Pins Download
SOT-23 (DCN) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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