SI7021-A20 Datasheet, PDF (9/36 Pages) Silicon Laboratories – IC HUMIDITY AND TEMPERATURE SENSOR

Si7021-A20
Table 5. Temperature Sensor
1.9 ≤ V_DD ≤ 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
Operating Range
Symbol
Test Condition
I and Y Grade
Min Typ Max
Unit
–40
— +125
°C
Accuracy¹
Repeatability/Noise
G Grade
–10 °C< t_A < 85 °C
–40 < t_A < 125 °C
14-bit resolution
–40
—
+85
°C
— ±0.3 ±0.4
°C
Figure 3
— 0.01 —
13-bit resolution
12-bit resolution
— 0.02 —
— 0.04 —
°C RMS
Response Time²
τ_63%
11-bit resolution
— 0.08 —
Unmounted device
—
0.7
—
s
Si7021-EB board
—
5.1
—
Long Term Stability
—  0.01 —
°C/Yr
Notes:
1. 14b measurement resolution (default).
2. Time to reach 63% of final value in response to a step change in temperature. Actual response time will vary
dependent on system thermal mass and air-flow.
Figure 3. Temperature Accuracy*
*Note: Applies only to I and Y grade devices beyond +85 °C.
Rev. 1.1
9