参数资料
型号: STM8AF52AATBU
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80
封装: 14 X 14 MM, ROHS COMPLIANT, LQFP-80
文件页数: 112/120页
文件大小: 2236K
代理商: STM8AF52AATBU
STM8AF52/62xx, STM8AF51/61xx
Electrical characteristics
Doc ID 14395 Rev 7
10.3.11
10-bit ADC characteristics
Subject to general operating conditions for VDDA, fMASTER and TA unless otherwise
specified.
Figure 44.
Typical application with ADC
1.
Legend: RAIN = external resistance, CAIN = capacitors, Csamp = internal sample and hold capacitor.
Table 59.
ADC characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fADC
ADC clock frequency
111 kHz
4 MHz
kHz/MHz
VDDA
Analog supply
3
5.5
V
VREF+
Positive reference voltage
2.75
VDDA
VREF-
Negative reference voltage
VSSA
0.5
VAIN
Conversion voltage range(1)
1.
During the sample time, the sampling capacitance, Csamp (3 pF typ), can be charged/discharged by the
external source. The internal resistance of the analog source must allow the capacitance to reach its final
voltage level within tS. After the end of the sample time tS, changes of the analog input voltage have no
effect on the conversion result.
—VSSA
—VDDA
Devices with
external VREF+/
VREF- pins
VREF-
—VREF+
Csamp
Internal sample and hold capacitor
3
pF
tS
Sampling time
(3 x 1/fADC)
fADC = 2 MHz
1.5
s
fADC = 4 MHz
0.75
tSTAB
Wakeup time from standby
fADC = 2 MHz
7
fADC = 4 MHz
3.5
tCONV
Total conversion time including
sampling time
(14 x 1/fADC)
fADC = 2 MHz
7
fADC = 4 MHz
3.5
Rswitch Equivalent switch resistance
30
k
Ω
AINx
STM8A
VDD
IL
VT
0.6V
VT
0.6V
VAIN
RAIN
10-bit A/D
conversion
CAIN
Ts
Csamp
Rswitch
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