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STM8AF526X Datasheet, PDF (85/125 Pages) STMicroelectronics – 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
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STM8AF526x/8x/Ax STM8AF6269/8x/Ax
Electrical characteristics
10.3.11
10-bit ADC characteristics
Subject to general operating conditions for VDDA, fMASTER and TA unless otherwise
specified.
Symbol
Table 43. ADC characteristics
Parameter
Conditions
Min Typ Max
Unit
fADC ADC clock frequency
-
111 kHz - 4 MHz kHz/MHz
VDDA Analog supply
-
3
-
5.5
VREF+ Positive reference voltage
-
2.75
-
VDDA
VREF- Negative reference voltage
-
VSSA
-
0.5
V
-
VSSA
-
VDDA
VAIN Conversion voltage range(1)
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
fADC = 4 MHz
-
1.5
-
-
0.75
-
tSTAB Wakeup time from standby
fADC = 2 MHz
-
7
-
fADC = 4 MHz
-
3.5
-
µs
Total conversion time including
fADC = 2 MHz
-
7
-
tCONV sampling time
(14 x 1/fADC)
fADC = 4 MHz
-
3.5
-
Rswitch Equivalent switch resistance
-
-
-
30
kΩ
1.
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charged/discharged by the
capacitance to reach its final
voltage level
effect on the
cwoitnhvinertsSi.oAnfrteersuthlte.
end
of
the
sample
time
tS,
changes
of
the
analog
input
voltage
have
no
Figure 43. Typical application with ADC
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1. Legend: RAIN = external resistance, CAIN = capacitors, Csamp = internal sample and hold capacitor.
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