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LM95214 Datasheet(PDF) 11 Page - Texas Instruments

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Part # LM95214
Description  Quad Remote Diode and Local Temperature Sensor with SMBus Interface
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM95214 Datasheet(HTML) 11 Page - Texas Instruments

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CONVERSION TIME (ms)
100
1000
10000
0.0
0.5
1.0
1.5
2.0
2.5
3.0
VDD = +3.3V
TA = 25°C
LM95214
www.ti.com
SNIS146A – MARCH 2007 – REVISED MARCH 2013
5. Status Registers
Main Status Register (Busy bit, Not Ready, Status Register 1 to 4 Flags)
Status 1 (diode fault)
Status 2 (TCRIT1)
Status 3 (TCRIT2)
Status 4 (TCRIT3)
6. Mask Registers
TCRIT1 Mask
TCRIT2 Mask
TCRIT3 Mask
7. Limit Registers
Local Tcrit Limit
Remote 1 Tcrit-1 Limit
Remote 2 Tcrit-1 Limit
Remote 3 Tcrit Limit
Remote 4 Tcrit Limit
Remote 1 Tcrit-2 and Tcrit-3 Limit
Remote 2 Tcrit-2 and Tcrit-3 Limit
Common Tcrit Hysteresis
8. Manufacturer ID Register
9. Revision ID Register
CONVERSION SEQUENCE
The LM95214 takes approximately 190 ms to convert the Local Temperature, Remote Temperatures 1 through
4, and to update all of its registers. These conversions for each thermal diode are addressed in a round robin
sequence. Only during the conversion process the busy bit (D7) in Status register (02h) is high. The conversion
rate may be modified by the Conversion Rate bits found in the Configuration Register (03h). When the
conversion rate is modified a delay is inserted between each round of conversions, the actual time for each
round remains at 190 ms (typical all channels enabled). The time a round takes depends on the number of
channels that are on. Different conversion rates will cause the LM95214 to draw different amounts of average
supply current as shown in Figure 6. This curve assumes all the channels are on. If channels are turned off the
average current will drop since the round robin time will decrease and the shutdown time will increase during
each conversion interval.
Figure 6. Conversion Rate Effect on Power Supply Current
POWER-ON-DEFAULT STATES
The LM95214 always powers up to these known default states. The LM95214 remains in these states until after
the first conversion.
Copyright © 2007–2013, Texas Instruments Incorporated
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