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TMP411-Q1 Datasheet(PDF) 18 Page - Texas Instruments |
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TMP411-Q1 Datasheet(HTML) 18 Page - Texas Instruments |
18 / 40 page ![]() TMP411-Q1 SBOS527F – DECEMBER 2010 – REVISED NOVEMBER 2013 www.ti.com RESOLUTION REGISTER CONVERSION RATE REGISTER The RES1 and RES0 bits (resolution bits 1 and 0) of The Conversion Rate Register controls the rate at the Resolution Register set the resolution of the local which temperature conversions are performed. This temperature measurement channel. Remote register adjusts the idle time between conversions but temperature measurement channel resolution is not not the conversion timing itself, thereby allowing the affected. Changing the local channel resolution also TMP411-Q1 power dissipation to be balanced with affects the conversion time and rate of the TMP411- the temperature register update rate. Table 8 shows Q1. The Resolution Register is set by writing to the conversion rate options and corresponding pointer address 1Ah and is read by reading from current consumption. pointer address 1Ah. Table 7 shows the resolution bits for the Resolution Register. ONE-SHOT CONVERSION When the TMP411-Q1 is in shutdown mode (SD = 1 Table 7. Resolution Register: Local Channel in the Configuration Register), a single conversion on Programmable Resolution both channels is started by writing any value to the RESOLUTION REGISTER (Read = 1Ah, Write = 1Ah, POR = One-Shot Start Register, pointer address 0Fh. This 1Ch) write operation starts one conversion; the TMP411- CONVERSION Q1 returns to shutdown mode when that conversion RES1 RES0 RESOLUTION TIME completes. The value of the data sent in the write (Typical) command is irrelevant and is not stored by the 0 0 9 bits (0.5°C) 12.5 ms TMP411-Q1. When the TMP411-Q1 is in shutdown 10 bits mode, an initial 200 μs is required before a one-shot 0 1 25 ms (0.25°C) command can be given. (NOTE: When a shutdown 11 bits command is issued, the TMP411-Q1 completes the 1 0 50 ms (0.125°C) current conversion before shutting down.) This wait 12 bits 100 ms time only applies to the 200 μs immediately following 1 1 (0.0625°C) shutdown. One-shot commands can be issued without delay thereafter. Bits 2 through 4 of the Resolution Register must always be set to 1. Bits 5 through 7 of the Resolution Register must always be set to 0. The power-on-reset value of this register is 1Ch. Table 8. Conversion Rate Register CONVERSION RATE REGISTER (Read = 04h, Write = 0Ah, POR = 08h) AVERAGE IQ (TYP) ( μA) CONVERSION/SE R7 R6 R5 R4 R3 R2 R1 R0 C VS = 2.7V VS = 5.5V 0 0 0 0 0 0 0 0 0.0625 11 32 0 0 0 0 0 0 0 1 0.125 17 38 0 0 0 0 0 0 1 0 0.25 28 49 0 0 0 0 0 0 1 1 0.5 47 69 0 0 0 0 0 1 0 0 1 80 103 0 0 0 0 0 1 0 1 2 128 155 0 0 0 0 0 1 1 0 4 190 220 07h to 0Fh 8 373 413 18 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: TMP411-Q1 |
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