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| 型號： | ADUC842BSZ62-3 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/88頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC/DAC 12BIT W/MCU 52MQFP |
| 標準包裝： | 1 |
| 系列： | MicroConverter® ADuC8xx |
| 核心處理器： | 8052 |
| 芯體尺寸： | 8-位 |
| 速度： | 8.38MHz |
| 連通性： | I²C，SPI，UART/USART |
| 外圍設(shè)備： | DMA，PSM，PWM，溫度傳感器，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器容量： | 62KB（62K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 2.25K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x12b，D/A 2x12b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 52-QFP |
| 包裝： | 托盤 |
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ADuC841/ADuC842/ADuC843
Rev. 0 | Page 23 of 88
ADC CIRCUIT INFORMATION
General Overview
The ADC conversion block incorporates a fast, 8-channel,
12-bit, single-supply ADC. This block provides the user with
multichannel mux, track-and-hold, on-chip reference, calibra-
tion features, and ADC. All components in this block are easily
configured via a 3-register SFR interface.
The ADC converter consists of a conventional successive
approximation converter based around a capacitor DAC. The
converter accepts an analog input range of 0 V to VREF. A high
precision, 15 ppm, low drift, factory calibrated 2.5 V reference is
provided on-chip. An external reference can be connected as
described in the Voltage Reference Connections section. This
external reference can be in the range 1 V to AVDD.
Single-step or continuous conversion modes can be initiated in
software or alternatively by applying a convert signal to an
external pin. Timer 2 can also be configured to generate a
repetitive trigger for ADC conversions. The ADC may be
configured to operate in a DMA mode whereby the ADC block
continuously converts and captures samples to an external
RAM space without any interaction from the MCU core. This
automatic capture facility can extend through a 16 MByte
external data memory space.
The ADuC841/ADuC842/ADuC843 are shipped with factory
programmed calibration coefficients that are automatically
downloaded to the ADC on power-up, ensuring optimum ADC
performance. The ADC core contains internal offset and gain
calibration registers that can be hardware calibrated to
minimize system errors.
A voltage output from an on-chip band gap reference propor-
tional to absolute temperature can also be routed through the
front end ADC multiplexer (effectively a 9th ADC channel
input), facilitating a temperature sensor implementation.
ADC Transfer Function
The analog input range for the ADC is 0 V to VREF. For this
range, the designed code transitions occur midway between
successive integer LSB values, i.e., 0.5 LSB, 1.5 LSB, 2.5 LSB . . .
FS –1.5 LSB. The output coding is straight binary with 1 LSB =
FS/4096 or 2.5 V/4096 = 0.61 mV when VREF = 2.5 V. The ideal
input/output transfer characteristic for the 0 V to VREF range is
shown in Figure 28.
OUTPUT
CODE
111...111
111...110
111...101
111...100
000...011
000...010
000...001
000...000
0V 1LSB
+FS
1LSB =
FS
4096
03260-0-026
Figure 28. ADC Transfer Function
Typical Operation
Once configured via the ADCCON 1–3 SFRs, the ADC converts
the analog input and provides an ADC 12-bit result word in the
ADCDATAH/L SFRs. The top 4 bits of the ADCDATAH SFR
are written with the channel selection bits to identify the channel
result. The format of the ADC 12-bit result word is shown in
Figure 29.
CH–ID
TOP 4 BITS
HIGH 4 BITS OF
ADC RESULT WORD
LOW 8 BITS OF THE
ADC RESULT WORD
ADCDATAH SFR
ADCDATAL SFR
03260-0-027
Figure 29. ADC Result Word Format
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC842BSZ62-3 | 制造商:Analog Devices 功能描述:IC MICROCONTROLLER |
| ADUC842BSZ62-5 | 功能描述:IC ADC/DAC 12BIT W/MCU 52-MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:250 系列:LPC11Uxx 核心處理器:ARM? Cortex?-M0 芯體尺寸:32-位 速度:50MHz 連通性:I²C，Microwire，SPI，SSI，SSP，UART/USART，USB 外圍設(shè)備:欠壓檢測/復(fù)位，POR，WDT 輸入/輸出數(shù):40 程序存儲器容量:96KB（96K x 8） 程序存儲器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 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:48-LQFP 包裝:托盤 其它名稱:568-9587 |
| ADUC842BSZ62-5 | 制造商:Analog Devices 功能描述:IC MICROCONTROLLER |
| ADUC843BCP32-3 | 制造商:Analog Devices 功能描述:MICROCONVERTER, ADUC842 WITHOUT DAC'S - Trays |
| ADUC843BCP32-5 | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 62KB Flash 5V 56-Pin LFCSP EP |
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