参数资料
型号: XRD98L61AIV-F
厂商: Exar Corporation
文件页数: 18/38页
文件大小: 0K
描述: IC CCD DIGITIZER 12BIT 48TQFP
标准包装: 250
位数: 12
通道数: 1
电压 - 电源,模拟: 2.7 V ~ 3.6 V
电压 - 电源,数字: 2.7 V ~ 3.6 V
封装/外壳: 48-TQFP
供应商设备封装: 48-TQFP(7x7)
包装: 托盘
25
Rev. 2.00
XRD98L61
PIXEL RATE CLOCKS
SBLK, SPIX & ADCLK
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
Figure 13. Detailed Pixel Rate Clock Timing for Default Register Settings
AFE holds the pixel Video Level on the rising edge of
SPIX.
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.
Note:
The timing descriptions in this section are correct for the default conditions:
All Polarity bits = 0,
RSTreject = 0 (switch always ON),
SPIXopt = 0
SBLK
SPIX
CCD
Signal
t
PIX
ADCLK
t
BK
t
VD
t
DL
t
PW1
t
PW2
Black Sample Point
Video Sample Point
DB[11:0]
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