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SI7005-B-FMR

DIGITAL I2C HUMIDITY AND TEMPERATURE SENSOR

Silicon Laboratories 

Si7005

Table 5. Temperature Sensor

2.1  VDD  3.6 V; TA = 0 to 70 °C (F grade) or –40 to +85 °C (G grade); tCONV = 35 ms unless otherwise noted.

Parameter

Operating Range

Resolution1

Symbol

Test Condition

Min Typ Max

–40

—

85

—

—

14

Accuracy2

Typical at 25 °C

—

—

1/32

—

±0.5 ±1.0

Maximum

See Figure 3.

Repeatability—Noise

—

0.1

—

Response Time3

Time to reach 63% of final value

—

1.5

—

Long Term Stability

— <0.05

—

Notes:

1. The Si7005 has a nominal output of 32 codes /°C, with 0000 = –50 °C

2. Temperature sensor accuracy is for VDD = 2.3 to 3.6 V.

3. Actual response times will vary dependent on system thermal mass and air-flow.

Unit

°C

Bit

°C

°C

°C

°C

RMS

s

°C/yr

TemperatureAccuracy

Max.TError(°C)

Typ.TError(°C)

4

3.5

3

2.5

2

1.5

1

0.5

0

Temperature(°C)

Figure 3. Temperature Accuracy

8

Rev. 1.3

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