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TMP451JQDQWRQ1 Datasheet(PDF) 8 Page - Texas Instruments

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Part No. TMP451JQDQWRQ1
Description  TMP451-Q1 짹1째C Remote and Local Temperature Sensor With 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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SCL
SDA
THERM
D+
D-
V+
GND
ALERT/THERM2
6 x I
16 x I
Internal
BJT
ADC
Control Logic
TMP451-Q1
Register Bank
Serial Interface
Oscillator
Voltage Regulator
I
8
TMP451-Q1
SLOS877B – OCTOBER 2014 – REVISED JUNE 2019
www.ti.com
Product Folder Links: TMP451-Q1
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Copyright © 2014–2019, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The TMP451-Q1 device is a digital temperature sensor that combines a local temperature measurement channel
and a remote-junction temperature measurement channel in a single DFN-8 package. The device is two-wire-
and SMBus-interface compatible, and is specified over a temperature range of –40°C to 125°C. The TMP451-Q1
device also contains multiple registers for programming and holding configuration settings, temperature limits,
and temperature measurement results.
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 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 temperature below 0°C results in a data value of 0 (00h). Likewise,
temperatures above 127°C result in a value of 127 (7Fh). The device can be set to measure over an extended
temperature range by changing bit 2 (RANGE) of 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 measure with the range of –55°C to 150°C. Additionally, the TMP451-Q1 is specified only for
ambient temperatures ranging from –40°C to 125°C; parameters in the Absolute Maximum Ratings table must be
observed.


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