Datasheet

ST7LITE0xY0, ST7LITESxY0
104/124
13.11 8-BIT ADC CHARACTERISTICS
T
A
= -40°C to 85°C, unless otherwise specified
Notes:
1. Unless otherwise specified, typical data are based on T
A
=25°C and V
DD
-V
SS
=5V. They are given only as design guide-
lines and are not tested.
2. Data based on characterization results, not tested in production.
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. The stabilization time of the AD converter is masked by the first t
LOAD
. The first conversion after the enable is then
always valid.
Figure 81. Typical Application with ADC
Symbol Parameter Conditions Min Typ Max Unit
f
ADC
ADC clock frequency 4 MHz
V
AIN
Conversion voltage range V
SS
V
DD
V
R
AIN
External input resistor 10
1)
kΩ
C
ADC
Internal sample and hold capacitor V
DD
=5V 3 pF
t
STAB
Stabilization time after ADC enable
f
CPU
=8MHz, f
ADC
=4MHz
0
2)
µs
t
CONV
Conversion time (t
SAMPLE
+t
HOLD
)3
t
SAMPLE
Sample capacitor loading time 4
1/f
ADC
t
HOLD
Hold conversion time 8
AINx
ST7XX
V
DD
I
L
±1µA
V
T
0.6V
V
T
0.6V
C
ADC
3pF
V
AIN
R
AIN
8-Bit A/D
Conversion
2kΩ(max)
C
AIN