ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 178

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

Electrical characteristics
12.12
Subject to general operating conditions for V
Table 93.
1. Any added external serial resistor downgrades the ADC accuracy (especially for resistance greater than 10kΩ). Data based
2. Injecting negative current on adjacent pins may result in increased leakage currents. Software filtering of the converted
Figure 81. R
1. C
178/201
Symbol
V
C
f
R
C
t
t
V
f
AREF
ADC
ADC
ADC
I
on characterization results, not tested in production.
analog value is recommended.
capacitance (3pF). A high C
AIN
ADC
AIN
lkg
AIN
AIN
PARASITIC
ADC clock frequency
Analog reference voltage
Conversion voltage range
Input leakage current for analog input
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
represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the pad
10-bit ADC characteristics
10-bit ADC characteristics
= 8MHz, SPEED = 0 f
AIN
max. vs f
Parameter
PARASITIC
ADC
with C
(1)
45
40
35
30
25
20
15
10
5
0
value downgrades conversion accuracy. To remedy this, f
ADC
= 2MHz
0
AIN
= 0pF
(2)
DD
C
PARASITIC
, f
10
0.7 * V
CPU
+85°C < T
-40°C ≤ T
, and T
Conditions
DD
(pF)
30
≤ V
A
A
A
AREF
≤ +125°C
≤ +85°C
unless otherwise specified.
2 M Hz
1 M Hz
70
≤ V
DD
V
Min
0.4
3.8
SSA
Typ
12
ADC
7.5
11
4
and
see
should be reduced.
ST7232Axx-Auto
V
Figure 81
±250
Figure 82
Max
V
AREF
±1
2
DD
1/f
MHz
Unit
nA
µA
Hz
kΩ
pF
pF
µs
V
ADC