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ST72321R7-Auto Datasheet(PDF) 219 Page - STMicroelectronics

Part # ST72321R7-Auto
Description  PLL for 2x frequency multiplication
PDF  243 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321R7-Auto Datasheet(HTML) 219 Page - STMicroelectronics

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ST72321xx-Auto
Electrical characteristics
Doc ID 13829 Rev 1
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19.12.3
ADC accuracy
Conditions: VDD =5V
(1)
Figure 101. ADC error classification
Table 136.
ADC accuracy
Symbol
Parameter(1)
1.
ADC Accuracy versus Negative Injection Current: Injecting negative current may reduce the accuracy of
the conversion being performed on another analog input.
Any positive injection current within the limits specified for IINJ(PIN) and IINJ(PIN) in Section 19.8 does not
affect the ADC accuracy.
Conditions
Typ
Max(2)
2.
Data based on characterization results, monitored in production to guarantee 99.73% within ± max value
from -40°C to 125°C (± 3
distribution limits).
Unit
|ET|
Total unadjusted error
CPU in run mode @ fADC 2 MHz
34
LSB
|EO|
Offset error
2
3
|EG|
Gain error
0.5
3
|ED|
Differential linearity error
12
|EL|
Integral linearity error
EO
EG
1LSBIDEAL
1LSB
IDEAL
V
AREF
V
SSA
–
1024
--------------------------------------------
=
Vin (LSBIDEAL)
Digital Result ADCDR
1023
1022
1021
5
4
3
2
1
0
7
6
1
234
567
1021 1022 1023 1024
(1)
(2)
ET
ED
EL
(3)
VAREF
VSSA
Legend:
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
ET = Total Unadjusted Error: maximum deviation
between the actual and the ideal transfer curves.
EO = Offset Error: deviation between the first
actual transition and the first ideal one.
EG = Gain Error: deviation between the last ideal
transition and the last actual one.
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.



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