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參數資料
| 型號： | TLE7824G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC,SOP-28 |
| 文件頁數： | 10/53頁 |
| 文件大小： | 900K |
| 代理商： | TLE7824G |
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TLE7824G
ADC Measurement Interface
Data Sheet
18
Rev. 3.01, 2008-04-15
Further details on the implementation of the calibration function and location of the calibration figures in Flash
memory can be found in a dedicated application note. The voltage measurement target parameters can be found
6.2
Temperature Measurement
In the temperature measurement mode the typical internal analog output voltage of the on-chip temperature
sensor can be described with the first order approximation:
(4)
Where:
T
j is the junction temperature in Kelvin
moand m1 are typical linear fitting parameters
The output code of the ADC is given by the following equation, where
V
AREF and N denote the ADC reference
voltage and the resolution of the ADC:
(5)
The junction temperature
T
J corresponding to the output code CA is given by:
[unit: K]
(6)
273.15 °C need to be subtracted to convert
T
j [K] into Centigrade Scale [°C].
The temperature measurement target parameters can be found in“ADC Temperature Measurement Interface”
6.2.1
Temperature Measurement Calibration Concept
Best measurement accuracy can be obtained by applying the calibration function:
(7)
The calibration coefficients f0 / 1 are computed during the production test and stored in the flash memory of the
microcontroller.
The selection between battery voltage and temperature measurement is done via SPI bit (see “SPI (Serial
Further details on the implementation of the calibration function and location of the calibration figures can be found
in a dedicated application note.
VA m0 m1 Tj
×
–
≈
CA
round
VA Tj
()
2
N
1
–
()
VAREF
--------------------
×
,
VA VAREF
≤
=
Tj
1
m1
------- m0
CA Tj
() VAREF
×
2
N
1
–
---------------------------------------
–
=
TCAL 586 f0 2
1
–
+
2 2
–
f1 2
10
–
+
[]
–
CA Tj
()
=
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