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SI7020-A10 Datasheet, PDF (4/34 Pages) Silicon Laboratories – Excellent long term stability | |||
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Si7020-A10
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
â40
â
Operating Temperature
TA
G grade
â40
â
Max
Unit
3.6
V
+125
°C
+85
°C
Table 2. General Specifications
1.9 < VDD < 3.6 V; TA = â40 to 85 °C (G grade) or â40 to 125 °C (I/Y grade); default conversion time unless otherwise noted.
Parameter
Input Voltage High
Input Voltage Low
Symbol
VIH
VIL
Test Condition
SCL, SDA pins
SCL, SDA pins
Min
0.7xVDD
â
Typ
Max Unit
â
â
V
â
0.3xVDD V
Input Voltage Range VIN SCL, SDA pins with respect to GND
0.0
â
VDD
V
Input Leakage
IIL
SCL, SDA pins
â
â
1
μA
Output Voltage Low VOL SDA pin; IOL = 2.5 mA; VDD = 3.3 V
â
â
0.6
V
SDA pin; IOL = 1.2 mA;
VDD = 1.9 V
â
â
0.4
V
Current
Consumption
Heater Current6
IDD
RH conversion in progress
â
Temperature conversion in progress
â
Standby, â40 to +85 °C2
â
Standby, â40 to +125 °C2
â
Peak IDD during powerup3
â
Peak IDD during I2C operations4
â
After writing to user registers5
â
IHEAT
â
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
20
â
μA
3.1
â
mA
Notes:
1. Initiating a RH measurement will also automatically initiate a temperature measurement. The total conversion time will
2.
be
No
tcCoOnNvVe(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. IDD after a user register write. Initiating any other subsequent I2C transaction on the same bus (such as the user
register read, starting an RH measurement, or traffic directed at other I2C devices) will transition the device to standby
mode.
6. Additional current consumption when HTRE bit enabled. See section â5.5. Heaterâ for more information
4
Rev. 1.1
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