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SI7020-A20-IM1 数据表(PDF) 6 Page - Silicon Laboratories

部件名 SI7020-A20-IM1
功能描述  IC HUMIDITY AND TEMPERATURE SENSOR
Download  36 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI7020-A20-IM1 数据表(HTML) 6 Page - Silicon Laboratories

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Si7020-A20
6
Rev. 1.1
Figure 1. I2C Interface Timing Diagram
Table 3. I2C Interface Specifications1
1.9
 VDD  3.6 V; TA = –40 to +85 °C (G grade) or –40 to +125 °C (I/Y grade) unless otherwise noted.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Hysteresis
VHYS
High-to-low versus low-to-
high transition
0.05 x VDD
——
V
SCLK Frequency2
fSCL
400
kHz
SCL High Time
tSKH
0.6
µs
SCL Low Time
tSKL
1.3
µs
Start Hold Time
tSTH
0.6
µs
Start Setup Time
tSTS
0.6
µs
Stop Setup Time
tSPS
0.6
µs
Bus Free Time
tBUF
Between Stop and Start
1.3
µs
SDA Setup Time
tDS
100
ns
SDA Hold Time
tDH
100
ns
SDA Valid Time
tVD;DAT From SCL low to data valid
0.9
µs
SDA Acknowledge Valid Time
tVD;ACK From SCL low to data valid
0.9
µs
Suppressed Pulse Width3
tSPS
50
ns
Notes:
1.
All values are referenced to VIL and/or VIH.
2.
Depending on the conversion command, the Si7020 may hold the master during the conversion (clock stretch). At
above 100 kHz SCL, the Si7020 may also hold the master briefly for user register and device ID transactions. At the
highest I2C speed of 400 kHz the stretching will be <50 µs.
3.
Pulses up to and including 50 ns will be suppressed.
SCL
D6
1/fSCL
tSKH
SDA
tSKL
tSTH
D5
D4
D0
R/W
ACK
tDS
tDH
Start Bit
Stop Bit
tBUF
tSTS
tVD : ACK
tSPS
tSP


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