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參數(shù)資料
| 型號： | AD7723BSZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT SIGMA-DELTA 44MQFP |
| 標準包裝： | 800 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 1.2M |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-QFP |
| 供應(yīng)商設(shè)備封裝： | 44-MQFP（10x10） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個差分，單極；1 個差分，雙極 |
| 配用： | EVAL-AD7723CBZ-ND - BOARD EVALUATION FOR AD7723 |
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AD7723
Rev. C | Page 19 of 32
Figure 32 shows the frequency response of the digital filter in
both low-pass and band-pass modes. Due to the sampling
nature of the converter, the pass-band response is repeated
about the input sampling frequency, fCLKIN, and at integer
multiples of fCLKIN. Out-of-band noise or signals coincident with
any of the filter images are aliased down to the pass band.
However, due to the AD7723’s high oversampling ratio, these
bands occupy only a small fraction of the spectrum, and most
broadband noise is attenuated by at least 90 dB. In addition, as
shown in Figure 33, with even a low-order filter, there is
significant attenuation at the first image frequency. This
contrasts with a normal Nyquist rate converter where a very
high-order antialias filter is required to allow most of the
bandwidth to be used while ensuring sufficient attenuation at
multiples of fCLKIN.
fCLKIN
0
1.0
0.5
0dB
–100dB
01186-029
Figure 29. Low-Pass Filter Decimate by 16
0
1.0
0.5
0dB
–100dB
01186-030
fCLKIN
Figure 30. Low-Pass Filter Decimate by 32
0
1.0
0.5
0dB
–100dB
01186-031
fCLKIN
Figure 31. Band-Pass Filter Decimate by 32
1
fCLKIN
2
fCLKIN
3
fCLKIN
0dB
01186-032
Figure 32. Digital Filter Frequency Response
fCLKIN/32
0dB
fCLKIN
REQUIRED
ATTENUATION
ANTIALIAS FILTER
RESPONSE
OUTPUT
DATA RATE
01186-033
Figure 33. Frequency Response of Antialias Filter
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD7723BSZ-REEL1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC |
| AD7724 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual CMOS Modulators |
| AD7724ACPZ | 功能描述:IC MOD SIGMA-DELTA DUAL 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
| AD7724ACPZ-REEL | 功能描述:IC MOD SIGMA-DELTA DUAL 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
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