參數(shù)資料
型號(hào)： ST72774S9T1
廠商： 意法半導(dǎo)體
元件分類： ADC
英文描述： 8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
中文描述： 8位USB單片機(jī)的顯示器，高達(dá)60K章檢察官辦公室，每1000內(nèi)存，模數(shù)轉(zhuǎn)換器，定時(shí)器，同步，材質(zhì)單元，脈寬調(diào)制/的BRM，的H / W DDC的
文件頁數(shù)： 123/144頁
文件大?。?/td> 1280K
代理商： ST72774S9T1
ST72774/ST727754/ST72734
123/144
4.10 8-BIT A/D CONVERTER (ADC)
4.10.1 Introduction
The on-chip Analog to Digital Converter (ADC)
peripheral is a 8-bit, successive approximation
converter with internal sample and hold circuitry.
This peripheral has up to 16 multiplexed analog
input channels (refer to device pin out description)
that allow the peripheral to convert the analog
voltage levels from up to 16 different sources.
The result of the conversion is stored in a 8-bit
Data Register. The A/D converter is controlled
through a Control/Status Register.
4.10.2 Main Features
I
8-bit conversion
I
Up to 16 channels with multiplexed input
I
Linear successive approximation
I
Data register (DR) which contains the results
I
Conversion complete status flag
I
On/off bit (to reduce consumption)
The block diagram is shown in
Figure 76
.
4.10.3 Functional Description
4.10.3.1 Analog Power Supply
V
DDA
and V
SSA
are the high and low level
reference voltage pins. In some devices (refer to
device pin out description) they are internally
connected to the V
DD
and V
SS
pins.
Conversion accuracy may therefore be impacted
by voltage drops and noise in the event of heavily
loaded or badly decoupled power supply lines.
See electrical characteristics section for more
details.
Figure 76. ADC Block Diagram
CH2
CH1
CH3
COCO
0
ADON
0
CH0
ADCCSR
AIN0
AIN1
ANALOG TO DIGITAL
CONVERTER
AINx
ANALOG
MUX
R
ADC
C
ADC
D2
D1
D3
D7
D6
D5
D4
D0
ADCDR
4
DIV 4
f
ADC
f
CPU
HOLD CONTROL
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