SI7013 Datasheet, PDF (5/43 Pages) Silicon Laboratories – I2C HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

Si7013
Table 2. General Specifications (Continued)
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
Conversion Time¹
Symbol
t_CONV
Test Condition
RH or Voltage Normal
RH or Voltage Fast
Min
Typ
Max Unit
—
5.8
7
ms
—
2.6
3.1
ms
Temp Normal
—
4
4.8
ms
Temp Fast
—
1.5
1.8
ms
Powerup Time
t_PU
From VDD ≥ 1.9 V to ready for a
—
conversion, 25 °C
From VDD ≥ 1.9 V to ready for a
—
conversion, full temperature range
18
25
ms
—
80
ms
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, Read Firmware Version, Read/Write
Thermistor Coefficients and Read Thermistor. Duration is <50 μs for all commands except Read Thermistor, which has
<150 μs duration.
5. Additional current consumption when HTRE bit enabled. See Section “5.6. Heater” for more information.
Table 3. I²C Interface Specifications¹
1.9  V_DD  3.6 V; T_A = –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
V_HYS High-to-low versus low-to- 0.05 x V_DD —
—
V
high transition
SCLK Frequency²
SCL High Time
SCL Low Time
Start Hold Time
Start Setup Time
Stop Setup Time
Bus Free Time
SDA Setup Time
SDA Hold Time
f_SCL
—
t_SKH
0.6
t_SKL
1.3
t_STH
0.6
t_STS
0.6
t_SPS
0.6
t_BUF
Between Stop and Start
1.3
t_DS
100
t_DH
100
—
400 kHz
—
—
µs
—
—
µs
—
—
µs
—
—
µs
—
—
µs
—
—
µs
—
—
ns
—
—
ns
Notes:
1. All values are referenced to V_IL and/or V_IH.
2. Depending on the conversion command, the Si7013 may hold the master during the conversion (clock stretch). At
above 300 kHz SCL, the Si7013 may hold the master briefly for user register and device ID transactions. At the highest
I²C speed of 400 kHz the stretching will be <10 µs.
3. Pulses up to and including 50ns will be suppressed.
Rev. 0.95
5