Datasheet

LM95214

SNIS146A –MARCH 2007–REVISED MARCH 2013

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1. All Temperature readings set to 0°C until the end of the first conversion

2. Remote offset for all channels 0°C

3. Configuration: Active converting, Fault Queue enabled for Remote 3 and 4

4. Continuous conversion with all channels enabled, time = 1s

5. Enhanced digital filter enabled for Remote 1 and 2

6. Status Registers depends on state of thermal diode inputs

7. Local and Remote Temperature Limits for TCRIT1, TCRIT2 and TCRIT3 outputs:

Output Pin Temperature Channel Limit

Remote 4 Remote 3 Remote 2 Remote 1 Local

(°C) (°C) (°C) (°C) (°C)

TCRIT1 Masked, Masked, 110 110 Masked,

85 85 85

TCRIT2 85 85 85 85 85

TCRIT3 85 85 Masked, Masked, Masked,

85 85 85

8. Manufacturers ID set to 01h

9. Revision ID set to 7Bh

SMBus INTERFACE

The LM95214 operates as a slave on the SMBus, so the SMBCLK line is an input and the SMBDAT line is

bidirectional. The LM95214 never drives the SMBCLK line and it does not support clock stretching. According to

SMBus specifications, the LM95214 has a 7-bit slave address. Three SMBus device address can be selected by

connecting A0 (pin 6) to either Low, Mid-Supply or High voltages. The LM95214 has the following SMBus slave

address:

A0 Pin State SMBus Device Address A[6:0]

Hex Binary

Low 18h 001 1000

Mid-Supply 4Dh 100 1101

High 4Eh 100 1110

TEMPERATURE CONVERSION SEQUENCE

Each of the 5 temperature channels of LM95214 can be turned OFF independent from each other via the

Channel Enable Register. Turning off unused channels will increase the conversion speed in the fastest

conversion speed mode. If the slower conversion speed settings are used, disabling unused channels will reduce

the average power consumption of LM95214.

Digital Filter

In order to suppress erroneous remote temperature readings due to noise as well as increase the resolution of

the temperature, the LM95214 incorporates a digital filter for Remote 1 and 2 Temperature Channels. When a

filter is enabled the filtered readings are used for the TCRIT comparisons. There are two possible digital filter

settings that are enabled through the Filter Setting Register at register address 0Fh. The filter for each channel

can be set according to the following table:

Product Folder Links: LM95214