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參數資料
| 型號： | ADUC836 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| 中文描述： | MicroConverter的，雙16位ADC的與嵌入62 kB閃存微控制器 |
| 文件頁數： | 27/80頁 |
| 文件大?。?/td> | 5913K |
| 代理商： | ADUC836 |
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ADuC836
–27–
Digital Filter
The output of the
-
modulator feeds directly into the digital
filter. The digital filter then band-limits the response to a frequency
significantly lower than one-half of the modulator frequency. In
this manner, the 1-bit output of the comparator is translated into
a band-limited, low noise output from the ADuC836 ADCs.
The ADuC836 filter is a low-pass, SIN
3
or (SINx/x)3 filter whose
primary function is to remove the quantization noise introduced
at the modulator. The cutoff frequency and decimated output
data rate of the filter are programmable via the SF (Sinc Filter)
SFR, as described in Table VIII.
Figure 11 shows the frequency response of the ADC channel at
the default SF word of 69 dec or 45H, yielding an overall output
update rate of just under 20 Hz.
It should be noted that this frequency response allows frequency
components higher than the ADC Nyquist frequency to pass
through the ADC, in some cases without significant attenuation.
These components may, therefore, be aliased and appear in-band
after the sampling process.
It should also be noted that rejection of mains related frequency
components, i.e., 50 Hz and 60 Hz, is seen to be at a level of
>65 dB at 50 Hz and >100 dB at 60 Hz. This confirms the data
sheet specifications for 50 Hz/60 Hz Normal Mode Rejection
(NMR) at a 20 Hz update rate.
0
20
30
50
70
80
90
100
110
FREQUENCY – Hz
G
0
–20
–40
–70
–80
–90
–100
–110
–120
10
40
60
–10
–30
–60
–50
Figure 11. Filter Response, SF = 69 dec
The response of the filter, however, will change with SF word, as
can be seen in Figure 12, which shows >90 dB NMR at 50 Hz
and >70 dB NMR at 60 Hz when SF = 255 dec.
0
20
30
50
70
80
90
110
FREQUENCY – Hz
G
0
–20
–40
–70
–80
–90
–100
–110
–120
10
40
60
–10
–30
–60
–50
Figure 12. Filter Response, SF = 255 dec
Figures 13 and 14 show the NMR for 50 Hz and 60 Hz across
the full range of SF word, i.e., SF = 13 dec to SF = 255 dec.
10
50
70
110
SF – Decimal
150 170 190 210
G
0
–20
–40
–70
–80
–90
–100
–110
–120
30
90
130
–10
–30
–60
–50
230 250
Figure 13. 50 Hz Normal Mode Rejection vs. SF
10
50
70
110
SF – Decimal
150 170 190 210
G
0
–20
–40
–70
–80
–90
–100
–110
–120
30
90
130
–10
–30
–60
–50
230 250
Figure 14. 60 Hz Normal Mode Rejection vs. SF
REV. A
相關PDF資料 |
PDF描述 |
|---|---|
| ADUC836BCP | MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| ADUC836BS | MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| ADUC842BCP62-3 | MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| ADUC843BCP62-5 | MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| ADUC842BCP62-5 | MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| ADUC836BCPZ-REEL | 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 |
| ADUC836BS | 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 52-Pin MQFP 制造商:Analog Devices 功能描述:8BIT MCU +16BIT DUAL ADC MQFP52 |
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