ST72321AR6-Auto STMicroelectronics, ST72321AR6-Auto Datasheet - Page 216

• Manufacturer Part Number: ST72321AR6-Auto
• Description: 8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR6-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

Electrical characteristics
19.12
Table 135. 10-bit ADC characteristics
1. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10k). Data
2. Injecting negative current on any of the analog input pins significantly reduces the accuracy of any conversion being
3. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10k). Data
216/243
Symbol
V
C
R
C
f
V
t
t
AREF
f
ADC
ADC
ADC
I
I
based on characterization results, not tested in production.
performed on any analog input. Analog pins of Flash devices can be protected against negative injection by adding a
Schottky diode (pin to ground). Injecting negative current on digital input pins degrades ADC accuracy especially if
performed on a pin close to the analog input pins. Any positive injection current within the limits specified for I
I
based on characterization results, not tested in production.
AIN
ADC
AIN
lkg
lkg
AIN
AIN
INJ(PIN)
ADC clock frequency
Analog reference voltage
Conversion voltage range
Positive input leakage current for
analog input
Negative input leakage current on
robust analog pins
External input impedance
External capacitor on analog input
Variation frequency of analog input
signal
Internal sample and hold capacitor
Conversion time (Sample + Hold)
f
f
No. of sample capacitor loading
cycles
No. of hold conversion cycles
CPU
ADC
in
Section 19.8
10-bit ADC characteristics
Subject to general operating conditions for V
= 8 MHz, speed = 0,
= 2 MHz
Parameter
does not affect the ADC accuracy.
(2)
(3)
(1)
0.7*V
-40°C < T
Other T
V
on adjacent robust analog
pin
Doc ID 13829 Rev 1
IN
< V
DD
Conditions
A
SS,
< V
ranges
A
| I
< 85°C range
AREF
IN
|< 400µA
DD
< V
, f
DD
CPU
, and T
V
Min
0.4
3.8
SSA
A
unless otherwise specified.
Typ
12
7.5
11
5
4
ST72321xx-Auto
Figure 97
Figure 98
V
±250
Max
V
See
and
AREF
±1
INJ(PIN)
2
DD
6
and
1/f
MHz
Unit
nA
µA
µA
k
Hz
pF
pF
µs
V
ADC