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ST7265X bảng dữ liệu(PDF) 154 Page - STMicroelectronics

tên linh kiện ST7265X
Giải thích chi tiết về linh kiện  LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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ST7265X bảng dữ liệu(HTML) 154 Page - STMicroelectronics

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13.12 8-BIT ADC CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
Figure 104. 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=2MHz
0 4)
µs
tADC
Conversion time (Sample+Hold)
6
- 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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