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參數(shù)資料
| 型號： | TLV320AIC28RGZ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | 7 X 7 MM, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 29/85頁 |
| 文件大小： | 1053K |
| 代理商： | TLV320AIC28RGZ |
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TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
35
10
8
6
4
2
0
2
4
6
8
10
40
20
0
20
40
60
80
100
Error
in
Measurement
TA Free-Air Temperature 5C
C
°
Figure 26. Typical Plot of Single Measurement Method After Calibrating for Offset at Room Temperature
1.20
1
0.80
0.60
0.40
0.20
0
0.20
40
20
0
20
40
60
80
100
Error
in
Measurement
TA Free-Air Temperature 5C
C
°
Figure 27. Typical Plot of Single Measurement Method After Calibrating for Offset and Gain At Two
Temperatures
The second mode uses a two-measurement (differential) method. This mode requires a second conversion with
a current 82 times larger. The voltage difference between the first (TEMP1) and second (TEMP2) conversion,
using 82 times the bias current, is represented by:
kT
q
ln(N)
where:
N is the current ratio = 82
k = Boltzmann’s constant (1.38054
1023 electrons volts/degrees Kelvin)
q = the electron charge (1.602189
1019 °C)
T = the temperature in degrees Kelvin
The equation for the relation between differential code and temperature may vary slightly from device to device
and can be calibrated at final system test by the user. This method provides resolution of approximately
1.5
°C/LSB and accuracy of approximately ±4°C after calibrating at room temperature.
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