LM95214 ±2°C Quad Remote and Local Temperature Sensor with SMBus Interface | TI.com

LM95214 (ACTIVE)

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

±2°C Quad Remote and Local Temperature Sensor with SMBus Interface - LM95214
 

Description

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.

Features

  • 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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Parametrics Compare all products in Digital Temperature Sensors

 
Device Type
Interface
Local Sensor Accuracy (Max) (+/- C)
Temp Resolution (Max) (bits)
Operating Temperature Range (C)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Max) (uA)
Features
Remote Channels (#)
Addresses
Rating
Package Group
Package Size: mm2:W x L (PKG)
LM95214 LM95234
Remote     Remote    
I2C
SMBus    
I2C
SMBus    
2     2    
11     11    
-40 to 140     -40 to 140    
3     2.7    
3.6     5.5    
800     800    
One shot conversion control
Programmable Alert
Programmable conversion rate
Remote diode fault detection
Shutdown
Thermal diode input stage filtering    
One shot conversion control
Programmable Alert
Programmable conversion rate
Remote diode fault detection
Shutdown
Thermal diode input stage filtering    
4     4    
3     3    
Catalog     Catalog    
WSON     WSON    
See datasheet (WSON)     See datasheet (WSON)