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TMP451JQDQFTQ1 Datasheet(PDF) 22 Page - Texas Instruments

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Part No. TMP451JQDQFTQ1
Description  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

TMP451JQDQFTQ1 Datasheet(HTML) 22 Page - Texas Instruments

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DXP
DXN
SCL
SDA
THERM
GND
V+
ALERT / THERM2
SMBus
Controller
1
2
3
4
5
8
7
6
TMP451-Q1
1.7V to 3.6V
1.7V to 3.6V
Overtemperature Shutdown
RS
(2)
RS
(2)
RS
(2)
RS
(2)
0.1µF
10k
(typ)
10k
(typ)
10k
(typ)
10k
(typ)
CDIFF
(3)
CDIFF
(3)
Transistor-connected configuration
(1)
Diode-connected configuration
(1)
Series Resistance
22
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
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TMP451-Q1 device requires only a transistor connected between the D+ and D– pins for remote
temperature measurement. Tie the D+ pin to GND if the remote channel is not used and only the local
temperature is measured. The SDA, ALERT, and THERM pins (and SCL, if driven by an open-drain output)
require pullup resistors as part of the communication bus. A 0.1-µF power-supply decoupling capacitor is
recommended for local bypassing. Figure 18 shows the typical configuration for the TMP451-Q1 device.
8.2 Typical Application
(1) Diode-connected configuration provides better settling time. Transistor-connected configuration provides better series resistance
cancellation.
(2) RS (optional) should be < 1 kΩ in most applications. Selection of RS depends on application; see the Filtering section.
(3) CDIFF (optional) should be < 1000 pF in most applications. Selection of CDIFF depends on application; see the Filtering section and
Figure 6, Remote Temperature Error vs Differential Capacitance.
Figure 18. TMP451-Q1 Basic Connections Using a Discrete Remote Transistor


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