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TMP461 Arkusz danych(PDF) 10 Page - Texas Instruments |
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TMP461 Arkusz danych(HTML) 10 Page - Texas Instruments |
10 / 35 page 10 TMP461 SBOS722B – JUNE 2015 – REVISED AUGUST 2016 www.ti.com Product Folder Links: TMP461 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated (1) Resolution is 1°C per count. Negative numbers are represented in twos complement format. (2) Resolution is 1°C per count. All values are unsigned with a –64°C offset. 8.3 Feature Description 8.3.1 Temperature Measurement Data The local and remote temperature sensors have a resolution of 12 bits (0.0625°C). Temperature data that result from conversions within the default measurement range are represented in binary form, as shown in the Standard Binary column of Table 1. Any temperatures above 127°C result in a value that rails to 127.9375 (7FFh). The device can be set to measure over an extended temperature range by changing bit 2 (RANGE) of the configuration register from low to high. The change in measurement range and data format from standard binary to extended binary occurs at the next temperature conversion. For data captured in the extended temperature range configuration, an offset of 64 (40h) is added to the standard binary value, as shown in the Extended Binary column of Table 1. This configuration allows measurement of temperatures as low as –64°C, and as high as 191°C; however, most temperature-sensing diodes only operate within the range of –55°C to 150°C. Additionally, the TMP461 is specified only for ambient temperatures ranging from –40°C to 125°C; parameters in the Absolute Maximum Ratings table must be observed. Table 1. Temperature Data Format (Local and Remote Temperature High Bytes) TEMPERATURE (°C) LOCAL AND REMOTE TEMPERATURE REGISTER HIGH BYTE VALUE (1°C Resolution) STANDARD BINARY(1) EXTENDED BINARY(2) BINARY HEX BINARY HEX –64 1100 0000 C0 0000 0000 00 –50 1100 1110 CE 0000 1110 0E –25 1110 0111 E7 0010 0111 27 0 0000 0000 00 0100 0000 40 1 0000 0001 01 0100 0001 41 5 0000 0101 05 0100 0101 45 10 0000 1010 0A 0100 1010 4A 25 0001 1001 19 0101 1001 59 50 0011 0010 32 0111 0010 72 75 0100 1011 4B 1000 1011 8B 100 0110 0100 64 1010 0100 A4 125 0111 1101 7D 1011 1101 BD 127 0111 1111 7F 1011 1111 BF 150 0111 1111 7F 1101 0110 D6 175 0111 1111 7F 1110 1111 EF 191 0111 1111 7F 1111 1111 FF |
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