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TMP302B Scheda tecnica(PDF) 8 Page - Texas Instruments |
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TMP302B Scheda tecnica(HTML) 8 Page - Texas Instruments |
8 / 18 page OUT 50°C 60°C T (TRIP) V S TMP302-Q1 SLOS889B – OCTOBER 2014 – REVISED JULY 2015 www.ti.com 8.3 Feature Description 8.3.1 HYSTSET If the temperature trip threshold is crossed, the open-drain, active low output (OUT) goes low and does not return to the original high state (that is, VS) until the temperature returns to a value within a hysteresis window set by the HYSTSET pin. The HYSTSET pin allows the user to choose between a 5°C and a 10°C hysteresis window. Table 2 lists the hysteresis window that corresponds to the HYSTSET setting. Table 2. HYSTSET Window HYSTSET THRESHOLD HYSTERESIS GND 5°C VS 10°C For the specific case of the TMP302A-Q1 device, if the HYSTSET pin is set to 10°C (that is, connected to VS) and the device is configured with a 60°C trip point (TRIPSET1 = VS, TRIPSET0 = GND), when this threshold is exceeded the output does not return to the original high state until it reaches 50°C. This case is more clearly shown in Figure 9. Figure 9. TMP302A-Q1: HYSTSET = VS, TRIPSET1 = VS, TRIPSET0 = GND 8.4 Device Functional Modes The TMP302-Q1 family of devices has a single functional mode. Normal operation for the TMP302-Q1 family of devices occurs when the power-supply voltage applied between the VS pin and GND is within the specified operating range of 1.4 to 3.6 V. The temperature threshold is selected by connecting the TRIPSET0 and TRIPSET1 pins to either the GND or VS pins (see Table 1). Hysteresis is selected by connecting the HYSTSET pin to either the GND or VS pins (see Table 2). The output pin, OUT, remains high when the temperature is below the selected temperature threshold. The OUT pin remains low when the temperature is at or above the selected temperature threshold. The OUT pin returns from a low state back to the high state based upon the amount of selected hysteresis (see the HYSTSET section). 8 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: TMP302-Q1 |
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