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TMP709AQDBVTQ1 Datasheet(PDF) 10 Page - Texas Instruments |
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TMP709AQDBVTQ1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 18 page OUT 50°C 60°C T (TRIP) V S 10 TMP709-Q1 SBOS829 – DECEMBER 2016 www.ti.com Product Folder Links: TMP709-Q1 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Typical Application (continued) 8.2.2 Detailed Design Procedure Connect the HYST pin to VCC for 10°C hysteresis. For a 60°C temperature threshold, see the Set-Point Resistor (RSET) section to compute an ideal RSET resistor value of 44.619 kΩ. Select the closest standard value resistor available; in this case, 44.2 kΩ. Use a 10-kΩ pullup resistor from the OT pin to the VCC pin. To minimize power, a larger-value pullup resistor can be used, but must not exceed 470 kΩ. Place a 0.1-μF bypass capacitor close to the TMP709-Q1 device in order to reduce noise coupled from the power supply. 8.2.3 Application Curves Figure 6 shows an example of the hysteresis feature. The HYST pin is connected to VCC, so the TMP709-Q1 device is configured for 10°C of hysteresis. The device is configured for a 60°C trip temperature by the RSET resistor value; therefore, the OT output asserts low when the 60°C threshold is exceeded. The OT output remains asserted low until the sensor reaches 50°C. Figure 6. TMP709-Q1 Hysteresis Function |
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