SI7020-A20 Datasheet, PDF (4/36 Pages) Silicon Laboratories – IC HUMIDITY AND TEMPERATURE SENSOR

Si7020-A20
1. Electrical Specifications
Unless otherwise specified, all min/max specifications apply over the recommended operating conditions.
Table 1. Recommended Operating Conditions
Parameter
Power Supply
Symbol Test Condition
Min
Typ
VDD
1.9
—
Operating Temperature
TA
I and Y grade
–40
—
Operating Temperature
TA
G grade
–40
—
Max
Unit
3.6
V
+125
°C
+85
°C
Table 2. General Specifications
1.9 < VDD < 3.6 V; TA = –40 to 85 °C (G grade) or –40 to 125 °C (I/Y grade); default conversion time unless otherwise noted.
Parameter
Symbol
Test Condition
Min
Typ
Max Unit
Input Voltage High
V_IH
Input Voltage Low
VIL
SCL, SDA pins
SCL, SDA pins
0.7xVDD
—
—
V
—
—
0.3xVDD V
Input Voltage Range VIN SCL, SDA pins with respect to GND
0.0
—
VDD
V
Input Leakage
IIL
SCL, SDA pins
—
—
1
μA
Output Voltage Low VOL SDA pin; IOL = 2.5 mA; VDD = 3.3 V
—
—
0.6
V
SDA pin; IOL = 1.2 mA;
VDD = 1.9 V
—
—
0.4
V
Current
Consumption
Heater Current⁵
IDD
I_HEAT
RH conversion in progress
Temperature conversion in progress
Standby, –40 to +85 °C²
Standby, –40 to +125 °C²
Peak IDD during powerup³
Peak IDD during I²C operations⁴
—
150
180
μA
—
90
120
μA
—
0.06
0.62 μA
—
0.06
3.8
μA
—
3.5
4.0
mA
—
3.5
4.0
mA
—
3.1 to 94.2 ^—
mA
Notes:
1. Initiating a RH measurement will also automatically initiate a temperature measurement. The total conversion time will
2.
be
No
tc_{CoOnNvVe(rRsHio)n+otrCIO2CNVt(rTan).saction}
in
progress.
Typical
values
measured
at
25
°C.
3. Occurs once during powerup. Duration is <5 msec.
4. Occurs during I²C commands for Reset, Read/Write User Registers, Read EID, and Read Firmware Version. Duration is
<100 µs when I²C clock speed is >100 kHz (>200 kHz for 2-byte commands).
5. Additional current consumption when HTRE bit enabled. See Section “5.5. Heater” for more information.
4
Rev. 1.1