Datasheet

LM95233

SNIS145E –AUGUST 2006–REVISED MARCH 2013

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

6. Enhanced digital filter enabled for Remote 1 and 2

7. Status Registers depends on state of thermal diode inputs

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

Output Pin Temperature Channel Limit

Remote 2 Remote 1 Local

(°C) (°C) (°C)

TCRIT1 110 110 Masked,

TCRIT2 85 85 85

TCRIT3 Masked, Masked, Masked,

85 85 85

1. Manufacturers ID set to 01h

2. Revision ID set to 79h

SMBus INTERFACE

The LM95233 operates as a slave on the SMBus, so the SMBCLK line is an input and the SMBDAT line is

bidirectional. The LM95233 never drives the SMBCLK line and it does not support clock stretching. According to

SMBus specifications, the LM95233 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 LM95233 has the following SMBus slave

address:

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

Hex Binary

Low 18h 001 1000

Mid-Supply 2Ah 010 1010

High 2Bh 010 1011

TEMPERATURE CONVERSION SEQUENCE

Each of the3 temperature channels of LM95233 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 LM95233.

DIGITAL FILTER

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

the temperature, the LM95233 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:

R1F[1:0] or R2F[1:0] Filter Setting

0 0 No Filter

0 1 Filter (equivalent to Level 2 filter of the LM86/LM89)

1 0 Reserved

1 1 Enhanced Filter (Filter with transient noise clipping)

Product Folder Links: LM95233