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參數(shù)資料
| 型號： | XRD98L62 |
| 廠商： | Exar Corporation |
| 英文描述： | CCD Image Digitizers with CDA，PGS and 12-Bit A/D(CCD圖像數(shù)字轉(zhuǎn)換器（帶CDA，PGS和12位A/D轉(zhuǎn)換器）) |
| 中文描述： | 與綜合發(fā)展區(qū)，和12的PGS CCD圖像數(shù)字轉(zhuǎn)換器，位A / D（防治荒漠化公約圖像數(shù)字轉(zhuǎn)換器（帶地帶素類和12位的A / D轉(zhuǎn)換器）） |
| 文件頁數(shù)： | 18/37頁 |
| 文件大?。?/td> | 394K |
| 代理商： | XRD98L62 |
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XRD98L62
18
Rev. P2.00
Preliminary
Programmable Gain Amplifier (PGA)
The PGA provides gains from 0dB to 36 dB in approximately 0.047 dB steps. The desired gain setting is
programmed via the 10 bit gain register in the Serial Interface.
For gain codes between 0 and 767 the gain can be calculated by the following equation:
×
=
36
768
]
[
Code
dB
Gain
For gain codes
≥
768 the gain is fixed at 36 dB. The gain doubles every 128 codes to simplify DSP algorithms and
control.
Gain Code, PGA[9:0]
P
0
1
5
2
0
6
7
12
18
24
30
36
27
9
1
5
Figure 6. PGA Gain vs. Gain Code
An example of setting the gain is as follows: If the CCD input is limited by 800mVpp (CDSV
IN
) and the ADC full
scale differential input (VID) is 2Vpp, then a minimum gain is calculated by:
=
CDSV
IN
VID
Gain
20 log
=
0.8
2
20 log
=
8dB
The gain code would be set to 170d for 8dB of PGA gain.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRD98L62ACV | 制造商:EXAR 制造商全稱:EXAR 功能描述:CCD Image Digitizers with CDS, PGA and 12-Bit A/D |
| XRD98L62ACV-F | 功能描述:視頻 IC RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| XRD98L62EVAL | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 XRD98L62 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| XRD98L62ZEVAL | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Eval Board (Solder) XRD98L62AIV RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| XRD98L63 | 制造商:EXAR 制造商全稱:EXAR 功能描述:CCD Image Digitizers with CDS, PGA and 12-Bit A/D |
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