ST72324BJ6 STMicroelectronics, ST72324BJ6 Datasheet - Page 169

• Manufacturer Part Number: ST72324BJ6
• Description: 5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72324BJ6

• Hdflash Endurance: 1 kcycle at 55 °C, data retention 40 years at 85 °C
• Clock Sources: crystal/ceramic resonator oscillators, int. RC osc. and ext. clock input
• 4 Power Saving Modes: Slow, Wait, Active-halt, and Halt

ST72324Bxx
Table 112. 10-bit ADC characteristics (continued)
1. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10kΩ). Data
2. Injecting negative current on adjacent pins may result in increased leakage currents. Software filtering of the converted
Symbol
t
ADC
based on characterization results, not tested in production.
analog value is recommended.
Conversion time (Sample + Hold)
f
f
No. of sample capacitor loading cycles
No. of Hold conversion cycles
CPU
ADC
Figure 84. R
1. C
Figure 85. Recommended C
1. This graph shows that, depending on the input signal variation (f
Figure 86. Typical A/D converter application
= 8 MHz, Speed = 0,
= 2 MHz
the pad capacitance (3 pF). A high C
f
stabilization time and decreased to allow the use of a larger serial resistor (R
ADC
PARASITIC
should be reduced.
Parameter
V
AIN
represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus
AIN
R
max. vs f
AIN
C
AIN
ADC
AINx
AIN
45
40
35
30
25
20
15
10
1000
5
0
100
0.1
with C
PARASITIC
10
1
and R
0
0.01
Conditions
AIN
value will downgrade conversion accuracy. To remedy this,
AIN
V
= 0 pF
DD
10
C
0.1
PARASITIC
values
V
0.6 V
V
0.6 V
f
AIN
T
T
(KHz)
(pF)
(1)
30
1
(1)
2 kΩ (max)
Cain 10 nF
Cain 22 nF
Cain 47 nF
AIN
I
2 MHz
1 MHz
lkg
), C
70
10
Min
AIN
can be increased for
10-bit A/D
conversion
AIN)
Electrical characteristics
Typ
.
7.5
11
4
ST72XXX
Max
C
12 pF
ADC
169/193
1/f
Unit
µs
ADC