±2°C Quad Remote and Local Temperature Sensor with SMBus Interface


Product details


Local sensor accuracy (Max) (+/- C) 2 Type Remote Operating temperature range (C) -40 to 140 Supply voltage (Min) (V) 3 Interface type I2C, SMBus Supply voltage (Max) (V) 3.6 Supply current (Max) (uA) 800 Temp resolution (Max) (bits) 11 Features One-shot conversion, ALERT Remote channels (#) 4 Addresses 3 Rating Catalog open-in-new Find other Digital temperature sensors

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  • Accurately Senses Die Temperature of 4 Remote ICs or Diode Junctions and Local Temperature
  • Local Temperature Accuracy ±2.0°C (Maximum)
  • Remote Diode Temperature Accuracy ±1.1°C (Maximum)
  • Supply Voltage: 3 V to 3.6 V
  • Average Supply Current (1-Hz Conversion Rate) 0.57 mA (Typical)
  • Programmable Digital Filters and Analog Front-End Filter
  • 0.125°C LSB Temperature Resolution
  • 0.03125°C LSB Remote Temperature Resolution With Digital Filter Enabled
  • Signed Format: +127.875°C/–128°C Remote Range
  • Unsigned Format: 0°C/255°C Remote Range
  • Remote Diode Fault Detection, Model Selection, and Offset Correction
  • Mask and Status Register Support
  • 3 Programmable TCRIT Outputs With Programmable Shared Hysteresis and Fault-Queue
  • Programmable Conversion Rate and Shutdown Mode One-Shot Conversion Control
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • Three-Level Address Pin
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The LM95214 device is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface that can very accurately monitor the temperature of four remote diodes as well as its own temperature. The four remote diodes can be external devices such as microprocessors, graphics processors that target the ideality of a 2N3904 transistor or diode-connected 2N3904s.

The LM95214 reports temperature in two different formats for +127.875°C/–128°C range and 0°C/255°C range. The LM95214 TCRIT1, TCRIT2 and TCRIT3 outputs are triggered when any unmasked channel exceeds its corresponding programmable limit and can be used to shutdown the system, to turn on the system fans or as a microcontroller interrupt function. The current status of the TCRIT1, TCRIT2, and TCRIT3 pins can be read back from the status registers. Mask registers are available for further control of the TCRIT outputs.

Two LM95214 remote temperature channels have programmable digital filters while the other two remote channels use a fault-queue to minimize unwanted TCRIT events when temperature spikes are encountered.

For optimum flexibility and accuracy, each LM95214 channel includes registers for offset correction. A three-level address pin allows connection of up to 3 LM95214s to the same SMBus master. The LM95214 includes power saving functions such as: programmable conversion rate, shutdown mode, and disabling of unused channels.

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Technical documentation

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* Data sheet LM95214 Quad Remote Diode and Local Temperature Sensor With SMBus Interface datasheet (Rev. B) Aug. 29, 2017
Technical article How to choose the right thermistor for your temperature sensing application Feb. 13, 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical article Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical article How to select a temperature sensor probe Feb. 18, 2016

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