ST7MC2 datasheet(281/308 Pages) STMICROELECTRONICS

部件名	ST7MC2

功能描述	8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI

PDF	308 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

281 / 308 page

ST7MC1/ST7MC2

281/308

10-BIT ADC CHARACTERISTICS (Cont’d)

Figure 159. Typical Application with ADC

Notes:

1. When VSSA pins are not available on the pinout, the ADC refer to VSS.

2. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10k

Ω). Data

based on characterization results, not tested in production.

3. CPARASITIC represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the pad ca-

pacitance (3pF). A high CPARASITIC value will downgrade conversion accuracy. To remedy this, fADC should be reduced.

4. This graph shows that depending on the input signal variation (fAIN), CAIN can be increased for stabilization time and

decreased to allow the use of a larger serial resistor (RAIN).

AINx

ST7MC

VDD

±1

µA

0.6V

VAIN

RAIN

VAREF

VSSA

0.1

µF

VDD

RAREF

CADC

6pF

CAIN

10-Bit A/D

Conversion

Ω(max)

ST7MC2 数据表(PDF) 281 Page - STMicroelectronics