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參數(shù)資料
| 型號： | XRD98L62EVAL |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 18/37頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD XRD98L62 |
| 標準包裝： | 1 |
| 系列： | * |
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25
Rev. P2.00
XRD98L62
Preliminary
Pipeline Delay
The digital outputs, DB[11:0] and OVER, are synchro-
nized to ADCLK. When ADCLKpol=0 (default), the
digital outputs change on the rising edge of ADCLK.
Figure 14 shows the pipeline delay (latency) from
sampling a pixel at the CDS input, until the
coresponding data is available at the digital output.
Pixel Rate CLOCKS
SBLK, SPIX & ADCLK
Note:
The timing descriptions in this section are correct for
the default conditions: All Polarity bits = 0,
RSTreject = 0 (switch always ON),
SPIXopt = 0
Sampling of the pixel Black Level is controlled by the
SBLK pulse. When SBLK is low, the internal sample
Black switches in the CDS are ON, sampling the pixel
black level on the internal capacitors.
The AFE starts tracking the pixel Video Level an
internal delay after the rising edge of SBLK. The
internal delay is programmed by DelayB[8:6]. The
AFE holds the pixel Video Level on the rising edge of
SPIX.
SBLK
SPIX
CCD
Signal
t
PIX
ADCLK
DB[11:0]
t
BK
t
VD
t
DL
t
PW1
t
PW2
Black Sample Point
Video Sample Point
Figure 13. Detailed Pixel Rate Clock Timing for Default Register Settings
The ADC will track the PGA output when ADCLK is
high. The ADC will hold the PGA output and start a
conversion when ADCLK goes low. The falling edge of
ADCLK should happen coincident with, or just before
the rising edge of SBLK. ADCLK should be as close as
possible to 50% duty cycle.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| XRD98L63AIV | 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 |
| XRD98L63AIV-F | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| XRD98L63AIVTR-F | 制造商:Exar Corporation 功能描述:AFE General Purpose 1ADC 12-Bit 3V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XRD98L63AIVTR-F |
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