Datasheet

ST6200C/ST6201C/ST6203C
84/100
10.11 8-BIT ADC CHARACTERISTICS
Subject to general operating conditions for V
DD
, f
OSC
, and T
A
unless otherwise specified.
Notes:
1. Unless otherwise specified, typical data are based on T
A
=25°C and V
DD
=5V.
2. The ADC refers to V
DD
and V
SS
.
3. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10k
Ω
). 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 66. Typical Application with ADC
Note: ADC not present on some devices. See device summary on page 1.
Symbol Parameter Conditions Min Typ
1)
Max Unit
f
OSC
Clock frequency 1.2 f
OSC
MHz
V
AIN
Conversion range voltage
2)
V
SS
V
DD
V
R
AIN
External input resistor 10
3)
k
Ω
t
ADC
Total convertion time
f
OSC
=8MHz
f
OSC
=4MHz
70
140
µ
s
t
STAB
Stabilization time
4)
24t
CPU
f
OSC
=8MHz 3.25 6.5 µs
AD
I
Analog input current during conver-
sion
1.0 µA
AC
IN
Analog input capacitance 2 5 pF
AINx
ST62XX
V
AIN
R
AIN
10pF
ADC
10M
Ω
r
≈
150
Ω
1