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TMP451JQDQFTQ1 Datasheet(PDF) 22 Page - Texas Instruments |
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TMP451JQDQFTQ1 Datasheet(HTML) 22 Page - Texas Instruments |
22 / 37 page ![]() 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 Submit Documentation Feedback 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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