10-bit Resolution
參數(shù)資料
型號(hào): ATMEGA103-6AI
廠商: Atmel
文件頁數(shù): 117/141頁
文件大?。?/td> 0K
描述: IC MCU 128K 6MHZ A/D IT 64TQFP
產(chǎn)品培訓(xùn)模塊: megaAVR Introduction
標(biāo)準(zhǔn)包裝: 90
系列: AVR® ATmega
核心處理器: AVR
芯體尺寸: 8-位
速度: 6MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 128KB(64K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 4K x 8
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 托盤
配用: ATSTK501-ND - ADAPTER KIT FOR 64PIN AVR MCU
77
ATmega103(L)
0945I–AVR–02/07
Analog-to-Digital
Converter
Feature list:
10-bit Resolution
±2 LSB Absolute Accuracy
0.5 LSB Integral Non-linearity
70 - 280 s Conversion Time
Up to 14 kSPS
8 Multiplexed Input Channels
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
The ATmega103(L) features a 10-bit successive approximation ADC. The ADC is con-
nected to an 8-channel Analog Multiplexer, which allows each pin of Port F to be used
as an input for the ADC. The ADC contains a Sample and Hold Amplifier, which ensures
that the input voltage to the ADC is held at a constant level during conversion. A block
diagram of the ADC is shown in Figure 45.
The ADC has two separate analog supply voltage pins, AV
CC and AGND. AGND must
be connected to GND, and the voltage on AV
CC must not differ more than ± 0.3V from
V
CC. See the section “ADC Noise Canceling Techniques” on page 82 on how to connect
these pins.
An external reference voltage must be applied to the AREF pin. This voltage must be in
the range AGND - AV
CC.
Figure 45. Analog-to-Digital Converter Block Schematic
ADC CONVERSION
COMPLETE IRQ
8-BIT DATA BUS
90
ADC MULTIPLEXER
SELECT (ADMUX)
ADC CTRL & STATUS
REGISTER (ADCSR)
ADC DATA REGISTER
(ADCH/ADCL)
MUX2
ADIE
ADSC
ADEN
ADIF
MUX1
MUX0
ADPS0
ADPS1
ADPS2
8-
CHANNEL
MUX
CONVERSION LOGIC
10-BIT DAC
+
-
SAMPLE & HOLD
COMPARATOR
Analog
Inputs
External
Reference
Voltage
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