ST72325J4B5 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST72325J4B5
STMicroelectronics
ST72325J4B5 Datasheet PDF : 193 Pages
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ST72325
10-BIT ADC CHARACTERISTICS (Cont’d)
12.12.3 ADC Accuracy
Conditions: VDD=5V 1)
Symbol
Parameter
Conditions
Typ Max2) Unit
|ET|
|EO|
|EG|
|ED|
|EL|
Notes:
Total unadjusted error 1)
Offset error 1)
Gain Error 1)
Differential linearity error 1)
Integral linearity error 1)
CPU in run mode @ fADC 2 MHz.
CPU in run mode @ fADC 2 MHz.
3
4
2
3
0.5
3
LSB
1
2
1
2
1. ADC Accuracy vs. 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 ΣIINJ(PIN) in Section 12.8 does not affect the ADC
accuracy.
2. Data based on characterization results, monitored in production to guarantee 99.73% within ± max value from -40°C
to 125°C (± 3σ distribution limits).
Figure 98. ADC Accuracy Characteristics
1023
1022
1021
7
6
5
4
3
2
1
Digital Result ADCDR
1LSBIDEAL
=
V-----A----R-----E----F------–----V----S-----S----A---
1024
(2)
ET
EO
EL
1 LSBIDEAL
0
1234567
VSSA
EG
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
(3)
(1)
ED
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.
1021 1022 1023 1024
VAREF
Vin (LSBIDEAL)
172/193
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