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STM8AF5286UDX データシート(PDF) 85 Page - STMicroelectronics

部品番号 STM8AF5286UDX
部品情報  Automotive 8-bit MCU, with up to 128 Kbyte Flash, data EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 to 5.5 V
PDF  125 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
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STM8AF5286UDX データシート(HTML) 85 Page - STMicroelectronics

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STM8AF526x/8x/Ax STM8AF6269/8x/Ax
Electrical characteristics
114
10.3.11
10-bit ADC characteristics
Subject to general operating conditions for VDDA, fMASTER and TA unless otherwise
specified.
Figure 43. Typical application with ADC
1. Legend: RAIN = external resistance, CAIN = capacitors, Csamp = internal sample and hold capacitor.
Table 43. 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



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