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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | ±1°C Remote and Local Temperature Sensor datasheet (Rev. C) | 07 May 2012 | |
| More literature | How to Protect Displays with the Latest Temperature Sensing Technology | PDF | HTML | 26 Jul 2021 | |
| Technical article | How to choose the right thermistor for your temperature sensing application | 13 Feb 2020 | ||
| Technical article | How to enable thermal safety for automotive infotainment and cluster systems | 15 Oct 2019 | ||
| Technical article | Driving industrial innovation with small-size sensors | 12 Sep 2019 | ||
| Technical article | How to select a temperature sensor probe | 18 Feb 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
Available in Linux Main line: Yes
Available through git.ti.com: N/A
| Package | Pins | Download |
|---|---|---|
| SOT-23 (DCN) | 8 | View options |
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