ST72321B STMICROELECTRONICS [STMicroelectronics], ST72321B Datasheet - Page 166

• Manufacturer Part Number: ST72321B
• Description: 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

12.12 10-BIT ADC CHARACTERISTICS
Subject to general operating conditions for V
Notes:
1. 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.
166/187
Symbol
V
C
V
R
C
f
t
t
f
AREF
ADC
ADC
ADC
I
AIN
ADC
lkg
AIN
AIN
AIN
ADC clock frequency
Analog reference voltage
Conversion voltage range
Positive input leakage current for analog
input
Negative input leakage current on ro-
bust analog pins
External input impedance
External capacitor on analog input
Variation freq. of analog input signal
Internal sample and hold capacitor
Conversion time (Sample+Hold)
f
- No of sample capacitor loading cycles
- No. of Hold conversion cycles
CPU
=8MHz, SPEED=0 f
Parameter
2
ADC
1)
=2MHz
DD
0.7*V
-40°C≤T
Other T
V
on adjacent robust ana-
log pin
, f
IN
CPU
<
V
DD
Conditions
SS,
, and T
A
A
≤V
ranges
≤85°C range
| I
AREF
IN
|< 400µA
A
≤V
unless otherwise specified.
DD
V
Min
0.4
3.8
SSA
Typ
12
7.5
5
11
4
Figure 93
Figure 94
V
±250
Max
and
see
V
AREF
±1
2
6
DD
1/f
Unit
MHz
nA
µA
µA
kΩ
Hz
pF
pF
µs
V
ADC