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TMP401
  • TMP401
  • TMP401

TMP401

ACTIVE

Remote and Local Temperature Sensor with N-Factor and Series-R Correction in VSSOP-8

Texas Instruments TMP401 Product Info

1 April 2026 3

Parameters

Local sensor accuracy (max)

3

Type

Remote

Operating temperature range (°C)

-40 to 125

Supply voltage (min) (V)

3

Interface type

I2C, SMBus

Supply voltage (max) (V)

5.5

Features

ALERT

Supply current (max) (µA)

36

Temp resolution (max) (bps)

12

Remote channels (#)

1

Addresses

1

Rating

Catalog

Package

VSSOP (DGK)-8-14.7 mm² 3 x 4.9

Features

  • ±1°C Remote Diode Sensor
  • ±3°C Local Temperature Sensor
  • Series Resistance Cancellation
  • THERM Flag Output
  • ALERT/THERM2 Flag Output
  • Programmable Over- and Undertemperature Limits
  • Programmable Resolution: 9- to 12-Bit
  • Diode Fault Detection
  • SMBus-Compatible
  • ±1°C Remote Diode Sensor
  • ±3°C Local Temperature Sensor
  • Series Resistance Cancellation
  • THERM Flag Output
  • ALERT/THERM2 Flag Output
  • Programmable Over- and Undertemperature Limits
  • Programmable Resolution: 9- to 12-Bit
  • Diode Fault Detection
  • SMBus-Compatible

Description

The TMP401 is a remote temperature sensor monitor with a built-in local temperature sensor. The remote sensor is capable of monitoring the temperature of any external PN junction. Typical sense elements include low-cost NPN- or PNP-type transistors and diodes, or accessible thermal diodes integrated within microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs).

The accuracy of the remote sensor 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 program alarm thresholds and to read temperature data.

Features included in the TMP401 are series resistance cancellation, wide remote temperature measurement range (up to +150°C), diode fault detection, and temperature alert functions.

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