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AD6674 Datasheet(PDF) 37 Page - Analog Devices |
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AD6674 Datasheet(HTML) 37 Page - Analog Devices |
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37 / 97 page  AD6674 Data Sheet Rev. C | Page 36 of 96 TEMPERATURE DIODE The AD6674 contains a diode-based temperature sensor for measuring the temperature of the die. This diode outputs a voltage and serve as a coarse temperature sensor to monitor the internal die temperature. The temperature diode voltage can be output to the FD_A pin using the SPI. Use Register 0x028[0] to enable or disable the diode. Register 0x028 is a local register. Channel A must be selected in the device index register (Register 0x008) to enable the temperature diode readout. Configure the FD_A pin to output the diode voltage by programming Register 0x040[2:0]. See Table 45 for more information. The voltage response of the temperature diode (with SPIVDD = 1.8 V) is shown in Figure 96. TEMPERATURE (°C) 0.60 0.65 0.70 0.75 0.80 0.85 0.90 –55 –45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 85 95 105 115 125 Figure 96. Temperature Diode Voltage vs. Temperature |
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