SI7013 Datasheet, PDF (13/43 Pages) Silicon Laboratories – I2C HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

Si7013
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.
1.9 to 3.6V
C2
0.1µF
TH1
10k
NTC
C1
0.1µF
R3
24k
2 _AD0/VOUT
6 _VINP
8
9
V_DDA
V_DDD
SCL
10
SDA ¹
Si7013
RST ⁵
7 _VINN
R4
24k
GNDD GNDA
3
4
R1 R2
10k 10k
SCL
SDA
Figure 6. Typical Application Circuit for Thermistor Interface with AD0 = 0
WR9
5
N
9WR9
9ROWDJH,QSXW
5
N
 _9,13
 _9,11
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—)


9''$ 9'''
6&/ ^
6'$ ^
6L
9616 ^
5 5
N N
6&/
6'$
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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 k and 2 k resistor divider keeps the voltage range to 1.0 V, which is within the
recommended 80% of V_REF. Full scale of 32767 counts is 3.75 V.
Rev. 0.95
13