STM8AF52AATAY datasheet(84/114 Pages) STMICROELECTRONICS

tên linh kiện	STM8AF52AATAY

Giải thích chi tiết về linh kiện	Automotive 8-bit MCU, with up to 128 Kbytes Flash, data EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 to 5.5 V

PDF	114 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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84 / 114 page

Electrical characteristics

STM8AF52/62xx, STM8AF51/61xx

84/114

DocID14395 Rev 10

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 45. ADC characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fADC

ADC clock frequency

—

111 kHz

—

4 MHz kHz/MHz

VDDA

Analog supply

—

5.5

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

—

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

—

fADC = 4 MHz

3.5

tCONV

Total conversion time including

sampling time

(14 x 1/fADC)

fADC = 2 MHz

—

fADC = 4 MHz

—

3.5

—

Rswitch Equivalent switch resistance

—

AINx

STM8A

VDD

0.6V

VAIN

RAIN

10-bit A/D

conversion

CAIN

Csamp

Rswitch

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