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參數資料
| 型號： | ADUC834BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCU |
| 中文描述： | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, MO-022-AC-1, MQFP-52 |
| 文件頁數： | 32/72頁 |
| 文件大小： | 1451K |
| 代理商： | ADUC834BS |
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(12 March 2002) REV.
P
rC
ADuC834
–
32
–
PRELIMINARY TECHNICAL DATA
Auxiliary ADC
T he Auxiliary ADC is intended to convert supplementary inputs
such as those from a cold junction diode or thermistor. T his ADC is
not buffered and has a fixed input range of 0 V to 2.5 V (as-
suming an external 2.5 V reference). T he single-ended inputs can be
MUX
AIN3
AIN4
AIN5
ON-CHIP
TEMPERATURE
SENSOR
SIGMA-
DELTA
MODULATOR
PROGRAMMABLE
DIGITAL
FILTER
SIGMA-DELTA A/D CONVERTER
REFIN(
)
REFIN(+)
CHO
P
OUTPUT
AVERAGE
OUTPUT
SCALING
DIGTAL OUTPUT
RESULT W RITTEN
TO ADC1H/L SFRs
CHOP
DIFFERENTIAL REFERENCE
THE EXTERNAL REFERENCE INPUT
TO THE ADuC834 IS DIFFERENTIAL AND
FACILITATES RATIOMETRIC
OPERATION. THE EXTERNAL
REFERENCE VOLTAGE IS SELECTED
VIA THE XREF1 BIT IN ADC1CON.
REFERENCE DETECT
CIRCUITRY TESTS FOR OPEN OR
SHORTED REFERENCES INPUTS
SEE PAGE 35
THE MODULATOR PROVIDES A
HIGH FREQUENCY 1-BIT DATA
STREAM (THE OUTPUT OF WHICH
IS ALSO CHOPPED) TO THE
DIGITAL FILTER,
THE DUTY CYCLE OF WHICH
REPRESENTS THE SAMPLED
ANALOG INPUT VOLTAGE
SEE PAGE 34
SIGMA DELTA
MODULATOR
PROGRAMMABLE DIGITAL
FILTER
THE SINC3 FILTER REMOVES
QUANTIZATION NOISE INTRODUCED
BY THE MODULATOR. THE UPDATE RATE
AND BANDWIDTH OF THIS
FILTER ARE PROGRAMMABLE
VIA THE SF SFR
SEE PAGE 35
OUTPUT AVERAGE
AS PART OF THE CHOPPING
IMPLEMENTATION EACH
DATA WORD OUTPUT
FROM THE FILTER IS
SUMMED AND AVERAGED
WITH ITS PREDECESSOR
TO NULL ADC CHANNEL
OFFSET ERRORS
SEE PAGE 35
SIGMA-DELTA ADC
THE SIGMA-DELTA
ARCHITECTURE ENSURES
16 BITS NO MISSING
CODES. THE ENTIRE
SIGMA-DELTA ADC IS
CHOPPED TO REMOVE DRIFT
ERRORS
SEE PAGE 35
THE OUPUT WORD FROM THE
DIGITAL FILTER IS SCALED BY
THE CALIBRATION
COEFFICIENTS BEFORE
BEING PROVIDED AS
THE CONVERSION RESULT
SEE PAGE 36
OUTPUT SCALING
ANALOG INPUT CHOPPING
THE INPUTS ARE ALTERNATELY
REVERSED THROUGH THE
CONVERSION CYCLE. CHOPPING
YIELDS EXCELLENT ADC
OFFSET AND OFFSET DRIFT
PERFORMANCE
SEE PAGE 36
ANALOG MULTIPLEXER
A DIFFERENTIAL MULTIPLEXER
ALLOWS SELECTION OF THREE
EXTERNAL SINGLE ENDED INPUTS OR
THE ON-CHIP TEMP. SENSOR.
THE MULTIPLEXER IS CONTROLLED
VIA THE CHANNEL SELECTION
BITS IN ADC1CON
SEE PAGE 28 AND 33
Figure 18. Auxiliary ADC Block Diagram
driven from AIN3, AIN4 or AIN5 pins or directly from the on-chip
temperature sensor voltage. A block diagram of the Auxiliary ADC
is shown in Figure 18.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADUC834BSZ | 功能描述:IC ADC DUAL16/24BIT W/MCU 52MQFP 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:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數:21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| ADUC836 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| ADUC836_02 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit ADCs with Embedded 62 kB Flash MCU |
| ADUC836BCP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADUC836BCPZ | 功能描述:IC MCU 62K FLASH ADC/DAC 56LFCSP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設備:欠壓檢測/復位，LED，POR，PWM，WDT 輸入/輸出數:16 程序存儲器容量:4KB（4K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數據轉換器:- 振蕩器型:內部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND |
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