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LM95214 Datasheet(PDF) 11 Page - Texas Instruments |
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LM95214 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 44 page 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 Submit Documentation Feedback 11 Product Folder Links: LM95214 |
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