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参数资料
| 型号： | STR715FZ0T1TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144 |
| 封装： | 20 X 20 MM, MS-026-BFB, LQFP-144 |
| 文件页数： | 64/78页 |
| 文件大小： | 2018K |
| 代理商： | STR715FZ0T1TR |
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STR71xF
Electrical parameters
67/78
1.
Data based on characterisation, not tested in production.
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
on robust pins is specified in Section 4.3.5.
Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in Section 4.3.5 does not
affect the ADC accuracy.
Figure 38.
ADC accuracy characteristics
Table 43.
ADC accuracy with fPCLK2 = 20 MHz, fADC=10 MHz, AVDD=3.3 V
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
ADC_DATA(0V)
Converted code when AIN=0V 1)
2370
2565
Dec-
imal
code
ADC_DATA(2.5V) Converted code when AIN=2.5V 1)
1480
1680
VCM
Center voltage of Sigma-Delta
Modulator1)
1.23
1.25
1.30
V
TUE
Total unadjusted error
In this type of ADC, calibration is necessary to correct
gain error and offset errors. Once calibrated, the TUE is
limited to the ILE.
|ED|
Differential linearity error1)
1.96
2.19
LSB
|EL|
Integral linearity error 1)
2.36
3.95
1LSBIDEAL
1LSB
IDEAL
AVDD
AVSS
–
4095
------------------------------------------------
=
VAIN (LSBIDEAL)
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
ED=Differential Linearity Error: maximum deviation between actual steps and the
ideal one.
EL=Integral Linearity Error: maximum deviation between any actual transition and
the end point correlation line.
Digital
Result
A
D
C_
D
A
T
A
Reg
is
ter
4095
4094
4093
5
4
3
2
1
0
123
4093 4094 4095
(1)
(2)
ED
EL
(3)
AVDD
AVSS
ADC_DATA(0V)
ADC_DATA(2.5V)
VCM
3100 3101 3102 3103
Out of range
1633
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