SI7013-A20 Datasheet, PDF(13/45 Page) Silicon Laboratories – IC HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

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SI7013-A20 Datasheet, PDF (13/45 Pages) Silicon Laboratories – IC HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

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Si7013-A20

The AD0/VOUT pin is a dual function pin. At powerup, it functions as an address select pin and selects the least

significant I2C Figure 5, the AD0/VOUT pin is pulled high, selecting AD0 = 1. In Figure 6, the AD0/VOUT pin is

pulled low selecting AD0 = 0.

Figure 6. Typical Application Circuit for Thermistor Interface with AD0 = 0

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Figure 7. Typical Application Circuit for Single Ended 0 to 3 V Measurement

Figure 7 demonstrates a single ended 0 to 3 V input range configuration. The voltage reference is the internal

1.25 V reference. The 1 kï and 2 kï resistor divider keeps the voltage range to 1.0 V, which is within the

recommended 80% of VREF. Full scale of 32767 counts is 3.75 V.

Rev. 1.1

13

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