TMP421 Remote Temp Sensor

TI's remote temperature sensor monitor with a built-in local temperature sensor

Image of Texas Instruments' TMP421 Remote Temp SensorTexas Instruments' TMP421 is a remote temperature sensor monitor 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 includes series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection.

Features Applications
  • 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
  • LCD/DLP®/LCOS projectors
  • Servers
  • Industrial controllers
  • Industrial and medical equipment
  • Processor/FPGA temperature monitoring


ImageManufacturer Part NumberDescriptionSensor TypeSensing Temperature - LocalAvailable QuantityView Details
TMP421AIDCNT datasheet linkSENSOR TEMPERATURE SMBUS SOT23-8TMP421AIDCNTSENSOR TEMPERATURE SMBUS SOT23-8Digital, Local/Remote-40°C ~ 125°C2081 - Immediate
TMP421AIDCNT product page link
Published: 2013-07-02