ST72321AR6 STMicroelectronics, ST72321AR6 Datasheet - Page 167

• Manufacturer Part Number: ST72321AR6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321AR6

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system 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, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

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.
2. Injecting negative current on any of the analog input pins significantly reduces the accuracy of any conversion being
performed on any analog input. Analog pins 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
does not affect the ADC accuracy.
Symbol
V
C
R
C
f
V
t
t
f
AREF
ADC
ADC
ADC
AIN
ADC
AIN
AIN
AIN
ADC clock frequency
Analog reference voltage
Conversion voltage range
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
ADC
1)
=2MHz
DD
0.7*V
, f
CPU
DD
Conditions
, and T
≤ V
AREF
A
ST72321Rx ST72321ARx ST72321Jx
unless otherwise specified.
≤ V
DD
V
Min
0.4
3.8
SSA
INJ(PIN)
and ΣI
Typ
7.5
12
11
4
INJ(PIN)
Figure 96
Figure 97
V
Max
and
V
see
AREF
2
DD
in
Section 12.8
167/193
1/f
Unit
MHz
kΩ
Hz
pF
pF
μs
V
ADC