ST72561R9 STMicroelectronics, ST72561R9 Datasheet - Page 246

• Manufacturer Part Number: ST72561R9
• Description: 8-BIT MCU WITH FLASH OR ROM, 10-BIT ADC, 5 TIMERS, SPI, LINSCI(TM), ACTIVE CAN
• Manufacturer: STMicroelectronics

Specifications of ST72561R9

• Hdflash Endurance: 100 cycles, data retention 40 years at 85°C
• 5 Power Saving Modes: Halt, Auto Wake Up From Halt, Active Halt, Wait and Slow

ST72561
ADC CHARACTERISTICS (Cont’d)
Figure 141. R
Figure 143. Typical Application with ADC
Notes:
1. C
pacitance (3pF). A high C
2. 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.
3. This graph shows that depending on the input signal variation (f
reduced to allow the use of a larger serial resistor (R
246/265
45
40
35
30
25
20
15
10
PARASITIC
5
0
V
AIN
0
represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the pad ca-
AIN
R
Max vs f
AIN
10
C
PARASITIC
PARASITIC
(pF)
C
ADC
AIN
30
AINx
with C
value will downgrade conversion accuracy. To remedy this, f
4 MHz
2 MHz
1 MHz
70
AIN
= 0pF
AIN)
1)2)
V
. It is valid for all f
DD
V
0.6V
V
0.6V
T
T
Figure 142. Recommended C
1000
AIN
100
0.1
10
1
), C
2kΩ(max)
AIN
I
±1μA
0.01
ADC
L
can be increased for stabilization time and
frequencies ≤ 4 MHz.
0.1
10-Bit A/D
Conversion
f
AIN
(KHz)
1
ADC
AIN
Cain 10 nF
Cain 22 nF
Cain 47 nF
should be reduced.
ST72XXX
/R
10
AIN
C
6pF
ADC
Values
3)