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參數(shù)資料
型號: AD9937KCPRL
廠商: ANALOG DEVICES INC
元件分類: 消費家電
英文描述: TVPS00RF-25-35PB W/ PC CONTACT
中文描述: SPECIALTY CONSUMER CIRCUIT, QCC56
封裝: MO-220-VLLD-2, LFCSP-56
文件頁數(shù): 21/44頁
文件大小: 410K
代理商: AD9937KCPRL
REV. 0
AD9937
–21–
ANALOG FRONT END DESCRIPTION AND OPERATION
The AD9937 AFE signal processing chain is shown in Figure 11.
Each processing step is essential in 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
μ
F series coupling
capacitor. This restores the dc level of the CCD signal to approxi-
mately 1.5 V to be compatible with the 3 V analog supply of
the AD9937.
Correlated Double Sampler
The CDS circuit samples each CCD pixel twice to extract the
video information and reject low frequency noise. The timing
diagram in Figure 13 illustrates how the two internally gener-
ated CDS clocks, SHP and SHD, are used to sample the
reference level and the data level, respectively, of the CCD
signal. The placement of the SHP and SHD sampling edges is
determined by the setting of the SHPLOC (addr 0x05) and
SHDLOC (addr 0x05) control registers. Placement of these two
clock edges is critical in achieving the best performance from
the CCD.
6dB TO 40dB
DIGITAL
FILTER
CLPOB
DC RESTORE
OPTICAL BLACK
CLAMP
ADC
VGA
8-BIT
DAC
CLAMP LEVEL
REGISTER
VGA GAIN
REGISTER
10
CDS
INTERNAL
VREF
2V FULL
SCALE
10
PRECISION
TIMING
GENERATION
SHPSHD
1.5V
OUTPUT
DATA
LATCH
REFT
2.0V
REFB
DOUT
PHASE
V-H
TIMING
GENERATION
SHP
SHD
DOUT
PHASE
CLPOB
1.0V
DOUT
8
1.0 F
1.0 F
CCDIN
AD9937
0.1 F
Figure 11. AFE Block Diagram
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9938BCBZ 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
AD9938BCPZ 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
AD9938KCP 制造商:Analog Devices 功能描述:- Bulk
AD9940BCPZ 功能描述:IC CDS TIMING DRIVE CONV 48LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP(6x6) 包裝:托盤
AD9940BCPZRL 功能描述:IC CDS TIMING DRIVE CONV 48LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP(6x6) 包裝:托盤
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