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| 型号： | AD9992BBCZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 59/92页 |
| 文件大小： | 0K |
| 描述： | IC CCD SGNL PROC 12BIT 105CSPBGA |
| 产品变化通告： | AD9992 Discontinuation 22/Feb/2012 |
| 标准包装： | 1 |
| 类型： | CCD 信号处理器，12 位 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | 3 线串口 |
| 电流 - 电源： | 27mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 105-LFBGA，CSPBGA |
| 供应商设备封装： | 105-CSPBGA（8x8） |
| 包装： | 托盘 |
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AD9992
Rev. C | Page 62 of 92
ANALOG FRONT END DESCRIPTION AND OPERATION
6dB ~ 42dB
CCDIN
CLI
DIGITAL
FILTER
CLPOB
DC RESTORE
OPTICAL BLACK
CLAMP
12-BIT
ADC
VGA
DAC
CDS
INTERNAL
VREF
2V FULL SCALE
PRECISION
TIMING
GENERATION
SHP
SHD
1.2V
OUTPUT
DATA
LATCH
REFT
REFB
V-H
TIMING
GENERATION
SHP SHD
DOUTPHASE
CLPOB PBLK
0.4V
1.4V
AD9992
0.1F
VGA GAIN
REGISTER
0.1F 0.1F
CLAMP LEVEL
REGISTER
12
PBLK
–3dB, 0dB,
+3dB, +6dB
PBLK
PBLK (WHEN DCBYP = 1)
SHP
S11
S21
BLANK TO
ZERO OR
CLAMP LEVEL
1S1 IS NORMALLY CLOSED; S2 IS NORMALLY OPEN.
CDS GAIN
REGISTER
VD
HD
DOUT
DOUTPHASE
DCLK
MODE
FIXED
DELAY
CLI
1
0
DCLKINV
05
89
1-
06
7
Figure 72. Analog Front-End Functional Block Diagram
The AD9992 signal processing chain is shown in Figure 72.
Each processing step is essential for achieving a high quality
image from the raw CCD pixel data.
DC Restore
To reduce the large dc offset of the CCD output signal, a dc
restore circuit is used with an external 0.1 μF series coupling
capacitor. This restores the dc level of the CCD signal to
approximately 1.2 V, making it compatible with the 1.8 V core
supply voltage of the AD9992. The dc restore switch is active
during the SHP sample pulse time.
The dc restore circuit can be disabled when the optional PBLK
signal is used to isolate large-signal swings from the CCD input
(see the Analog Preblanking section). Bit 6 of AFE Register
Address 0x00 controls whether the dc restore is active during the
PBLK interval.
Analog Preblanking
During certain CCD blanking or substrate clocking intervals,
the CCD input signal to the AD9992 can increase in amplitude
beyond the recommended input range. The PBLK signal can be
used to isolate the CDS input from large-signal swings. While
PBLK is active (low), the CDS input is internally shorted to ground.
Note that, because the CDS input is shorted during PBLK, the
CLPOB pulse should not be used during the same active time as
the PBLK pulse.
Correlated Double Sampler (CDS)
The CDS circuit samples each CCD pixel twice to extract the video
information and to reject low frequency noise. The timing
shown in Figure 19 illustrates how the two internally generated
CDS clocks, SHP and SHD, are used to sample the reference
level and data level of the CCD signal, respectively. The placement
of the SHP and SHD sampling edges is determined by the setting
of the SHPLOC and SHDLOC registers located at Address 0x37.
Placement of these two clock signals is critical for achieving the
best performance from the CCD.
The CDS gain is variable in three steps by using the AFE
Address 0x04: 3 dB, 0 dB (default), and +3 dB. Improved noise
performance results from using the +3 dB setting, but the input
range is reduced (see the Analog Specifications section).
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| AD9992BBCZRL | 功能描述:IC CCD SGNL PROC 12BIT 105CSPBGA RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| AD9993BBCZ | 功能描述:IC MIXED-SIGNAL FRONT END 196BGA 制造商:analog devices inc. 系列:- 包装:托盘 零件状态:在售 类型:ADC，DAC 输入类型:LVDS 输出类型:LVDS 接口:SPI 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:196-LFBGA，CSPBGA 供应商器件封装:196-CSPBGA（12x12） 标准包装:1 |
| AD9993BBCZRL | 功能描述:IC MIXED-SIGNAL FRONT END 196BGA 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 类型:ADC，DAC 输入类型:LVDS 输出类型:LVDS 接口:SPI 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:196-LFBGA，CSPBGA 供应商器件封装:196-CSPBGA（12x12） 标准包装:1,500 |
| AD9993-EBZ | 功能描述:EVAL BOARD MXFE AD9993 制造商:analog devices inc. 系列:* 零件状态:在售 标准包装:1 |
| AD9994 | 制造商:AD 制造商全称:Analog Devices 功能描述:12-Bit CCD Signal Processor with Precision Timing Generator |
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