ST72324B datasheet(143/167 Pages) STMICROELECTRONICS

Part #	ST72324B

Description	5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE

PDF	167 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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143 / 167 page

ST72324B

143/167

12.13 10-BIT ADC CHARACTERISTICS

Subject to general operating conditions for VDD, fCPU, and TA unless otherwise specified.

Notes:

1. 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.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fADC

ADC clock frequency

0.4

MHz

VAREF

Analog reference voltage

0.7*VDD ≤VAREF ≤VDD

3.8

VDD

VAIN

Conversion voltage range 1)

VSSA

VAREF

Ilkg

Positive input leakage current for analog

input

-40°C

≤TA≤+85°C

±250

+85°C

≤TA≤+125°C

±1

µA

Negative input leakage current on ro-

bust analog pins

VIN<VSS, | IIN |< 400µA

on adjacent robust ana-

log pin

µA

RAIN

External input impedance

see

Figure 80

and

Figure

812)3)4)

Ω

CAIN

External capacitor on analog input

fAIN

Variation freq. of analog input signal

CADC

Internal sample and hold capacitor

tADC

Conversion time (Sample+Hold)

fCPU=8MHz, SPEED=0 fADC=2MHz

7.5

µs

tADC

- No of sample capacitor loading cycles

- No. of Hold conversion cycles

1/fADC

ST72324B Datasheet(PDF) 143 Page - STMicroelectronics

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