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CST12.0MTWA Datasheet(PDF) 138 Page - STMicroelectronics

No. de pieza CST12.0MTWA
Descripción Electrónicos  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  153 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

CST12.0MTWA Datasheet(HTML) 138 Page - STMicroelectronics

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ST72334J/N, ST72314J/N, ST72124J
138/153
16.12 8-BIT ADC CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
Figure 98. Typical Application with ADC
Notes:
1. Unless otherwise specified, typical data are based on TA=25°C and VDD-VSS=5V. They are given only as design guide-
lines and are not tested.
2. When VDDA and VSSA pins are not available on the pinout, the ADC refer to VDD and VSS .
3. 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.
4. The stabilization time of the AD converter is masked by the first tLOAD. The first conversion after the enable is then
always valid.
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
fADC
ADC clock frequency
4
MHz
VAIN
Conversion range voltage 2)
VSSA
VDDA
V
RAIN
External input resistor
10 3)
k
Ω
CADC
Internal sample and hold capacitor
6
pF
tSTAB
Stabilization time after ADC enable
fCPU=8MHz, fADC=4MHz
0 4)
µs
tADC
Conversion time (Sample+Hold)
3
- Sample capacitor loading time
- Hold conversion time
4
8
1/fADC
AINx
ST72XXX
CIO
~2pF
VDD
IL
±1
µA
VT
0.6V
VT
0.6V
VAIN
RAIN
VDDA
VSSA
0.1
µF
VDD
ADC



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