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参数资料
| 型号： | STR630FZ2T6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 36 MHz, RISC MICROCONTROLLER, PQFP144 |
| 封装： | 20 X 20 MM, TQFP-144 |
| 文件页数： | 37/51页 |
| 文件大小： | 1485K |
| 代理商： | STR630FZ2T6 |
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Electrical parameters
STR73xF
42/51
3.3.6
10-bit ADC characteristics
Subject to general operating conditions for VDDA, fMCLK, and TA unless otherwise specified.
Notes:
1.
Unless otherwise specified, typical data are based on TA=25°C and VDDA-VSS=5.0V. They are given only
as design guidelines and are not tested.
2.
Calibration is recommended once after each power-up.
3.
During the sample time the input capacitance CAIN (6.8 max) can be charged/discharged by the external
source. The internal resistance of the analog source must allow the capacitance to reach its final voltage
level within tS. After the end of the sample time tS, changes of the analog input voltage have no effect on
the conversion result. Values for the sample clock tS depend on programming.
1.
ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-
robust) analog input pins should be avoided as this significantly reduces the accuracy of the conversion
being performed on another analog input. It is recommended to add a Schottky diode (pin to ground) to
standard analog pins which may potentially inject negative current. The effect of negative injection current
Table 24.
ADC characteristics
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
fADC
0.4
10
MHz
VAIN
Conversion voltage range 2)
VSSA
VDDA
V
Ilkg
Negative input leakage current on
analog pins
VIN<VSS, | IIN |<
400A on adjacent
analog pin
56
A
CADC
Internal sample and hold
capacitor
3.5
pF
tCAL
2)
Calibration Time
fADC = 10MHz
580.2
s
5802
1/fADC
tS
3)
Sampling time
fADC = 10MHz
114
s
tCONV
Total Conversion time (including
sampling time)
fADC = 10MHz
3s
30 (10 for sampling
+20 for successive
approximation)
1/fADC
IADC
Running mode
Normal Mode
5
mA
Power-down mode
1
A
Table 25.
ADC Accuracy with fMCLK = 20MHz, fADC=10MHz, RAIN < 10kRAIN,
VDDA=5V. This assumes that the ADC is calibrated
2)
Symbol
Parameter
Conditions
Typ
Max
Unit
|ET|
Total unadjusted error 1)
1.0
2.0
LSB
|EO|
Offset error 1)
0.15
1.0
|EG|
Gain Error 1)
0.97
1.1
|ED|
Differential linearity error1)
0.7
1.0
|EL|
Integral linearity error 1)
0.76
1.5
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