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| CD00001237 Datasheet, PDF (89/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter | |||
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ST6215C ST6225C
11.11 8-BIT ADC CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ 1)
Max
fOSC
VAIN
RAIN
tADC
tSTAB
ADI
Clock frequency
Conversion range voltage 2)
External input resistor
Total convertion time
fOSC=8MHz
fOSC=4MHz
Stabilization time 4)
Analog input current during conver-
sion
fOSC=8MHz
1.2
fOSC
VSS
VDD
10 3)
70
140
2
4
3.25
6.5
1.0
ACIN Analog input capacitance
2
5
Unit
MHz
V
kΩ
μs
tCPU
µs
µA
pF
Notes:
1. Unless otherwise specified, typical data are based on TA=25°C and VDD=5V.
2. The ADC refers to VDD and VSS.
3. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10kΩ). Data
based on characterization results, not tested in production.
4. As a stabilization time for the AD converter is required, the first conversion after the enable can be wrong.
Figure 72. Typical Application with ADC
VAIN
RAIN
AINx
râ150Ω
10pF
10MΩ
ADC
Note: ADC not present on some devices. See device summary on page 1.
ST62XX
89/105
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