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STM8AF/P6346 数据表(PDF) 73 Page - STMicroelectronics

部件名 STM8AF/P6346
功能描述  Automotive 8-bit MCU, with up to 32-Kbyte Flash memory, data EEPROM, 10-bit ADC, timers, LIN, SPI, I2C, 3 to 5.5 V
PDF  95 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM8AF/P6346 数据表(HTML) 73 Page - STMicroelectronics

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DS12343 Rev 2
73/95
STM8AF6366
Electrical characteristics
93
10.3.11
10-bit ADC characteristics
Subject to general operating conditions for VDDA, fMASTER, and TA unless otherwise
specified.
Figure 40. Typical application with ADC
1. Legend: RAIN = external resistance, CAIN = capacitors, Csamp = internal sample and hold capacitor.
Table 40. 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(1)
Sampling time
(3 x 1/fADC)
fADC = 2 MHz
-
1.5
-
µs
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
MSv38342V1
STM8A
RAIN
CAIN
VAIN
AINx
VDD
VT
0.6 V
VT
0.6 V
Csamp
IL
10-bit A/D
conversion
Rswitch
Ts



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