SI7013-A20-YM1R 查看數據表（PDF） - Silicon Laboratories

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SI7013-A20-YM1R

I2C HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

Silicon Laboratories 

Si7013-A20

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

tCONV

Test Condition

12-bit RH

11-bit RH

10-bit RH

8-bit RH

14-bit temperature

13-bit temperature

12-bit temperature

11-bit temperature

Min

Typ

Max Unit

—

—

—

—

—

—

—

—

10

12

s 5.8

7

3.7

4.5

n 2.6

3.1

ig 7

10.8

ms

s 4

6.2

e 2.4

3.8

D 1.5

2.4

Voltage Normal

—

—

7

Voltage Fast

—

—

3.1

ew Powerup Time

tPU

From VDD ≥ 1.9 V to ready for a

—

18

25

ms

conversion, 25 °C

N From VDD ≥ 1.9 V to ready for a

—

conversion, full temperature range

—

80

ms

r After issuing a software reset

—

5

15

ms

fo command

Notes:

1. Initiating a RH measurement will also automatically initiate a temperature measurement. The total conversion time will

d be tCONV(RH) + tCONV(T).

2. No conversion or I2C transaction in progress. Typical values measured at 25 °C.

e 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

d Thermistor Coefficients and Measure Analog Voltage or Thermistor Temperature. Duration is <50 μs for all commands

n except Measure Analog Voltage or Thermistor Temperature, which has <150 μs duration when Thermistor Correction is

enabled.

e 5. Additional current consumption when HTRE bit enabled. See Section “5.6. Heater” for more information.

m 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.

om Parameter

Symbol

Test Condition

Min

Typ Max Unit

c Hysteresis

VHYS

High-to-low versus

0.05 x VDD —

—

V

low-to-high transition

e SCLK Frequency2

fSCL

—

—

400 kHz

R SCL High Time

tSKH

0.6

—

—

μs

tNotes:

o1. All values are referenced to VIL and/or VIH.

2. Depending on the conversion command, the Si7013 may hold the master during the conversion (clock stretch). At

N 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 <50 μs.

3. Pulses up to and including 50 ns will be suppressed.

Rev. 1.4

5

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