- 您現在的位置：買賣IC網 > PDF目錄373971 > AD9942 (Analog Devices, Inc.) Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing⑩ Core PDF資料下載
參數資料
| 型號： | AD9942 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing⑩ Core |
| 中文描述： | 雙通道，14位CCD信號處理器核心精確定時⑩ |
| 文件頁數： | 29/36頁 |
| 文件大小： | 452K |
| 代理商： | AD9942 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁當前第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
AD9942
APPLICATIONS INFORMATION
CIRCUIT CONFIGURATION
The AD9942 recommended circuit configuration is shown in
Figure 30. Achieving good image quality from the AD9942
requires careful attention to the printed circuit board (PCB)
layout. All signals should be routed to maintain low noise
performance. The CCD_A and CCD_B output signals should
be directly routed to Pins A1 and A7, respectively, through a
0.1 μF capacitor. The master clock, CLI_X, should be carefully
routed to Pins A3 and A9 to minimize interference with the
CCDIN_X, REFT_X, and REFB_X signals.
Rev. A | Page 29 of 36
The digital outputs and clock inputs should be connected to the
digital ASIC away from the analog and CCD clock signals.
Placing series resistors close to the digital output pins may help
to reduce digital code transition noise. If the digital outputs
must drive a load larger than 20 pF, buffering is recommended
to minimize additional noise. If the digital ASIC can accept gray
code, the AD9942 outputs can be selected to output data in gray
code format using the Control Register Bit D5. Gray coding
helps reduce potential digital transition noise compared with
binary coding.
The H1X to H4X and RG_X traces should have low inductance
to avoid excessive distortion of the signals. Heavier traces are
recommended because of the large transient current demand on
H1X to H4X from the capacitive load of the CCD. If possible,
physically locate the AD9942 closer to the CCD to reduce the
inductance on these lines. As always, the routing path should be
as direct as possible from the AD9942 to the CCD.
The CLI_X and CCDIN_X PCB traces should be carefully
matched in length and impedance to achieve optimal channel-
to-channel matching performance.
GROUNDING/DECOUPLING RECOMMENDATIONS
As Figure 30 shows, a single ground plane is recommended
for the AD9942. This ground plane should be as continuous
as possible, particularly around the P-, AI-, and A-type pins,
to ensure that all analog decoupling capacitors provide the
lowest possible impedance path between the power and bypass
pins and their respective ground pins. All high frequency
decoupling capacitors should be located as close as possible
to the package pins.
All the supply pins must be decoupled to ground with good
quality, high frequency chip capacitors. There should also be
a 4.7 μF or larger bypass capacitor for each main supply—that
is, the AVDD_X, RGVDD_X, HVDD_X, and DRVDD_X—
although this is not necessary for each individual pin. In most
applications, it is easier to share the supply for RGVDD_X and
HVDD_X, which can be done as long as the individual supply
pins are separately bypassed. A separate 3 V supply can be used
for DRVDD_X, but this supply pin should still be decoupled to
the same ground plane as the rest of the chip. A separate ground
for DRVSS_X is not recommended.
The reference bypass pins (REFT_X, REFB_X) should be
decoupled to ground as close as possible to their respective pins.
The analog input capacitor (CCDIN_X) should also be located
close to the pin.
The GND connections should be tied to the lowest impedance
ground plane on the PCB. Performance does not degrade if
several of these GND connections are left unconnected for
routing purposes.
相關PDF資料 |
PDF描述 |
|---|---|
| AD9942BBCZ | Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing⑩ Core |
| AD9942BBCZRL | Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing⑩ Core |
| AD9943 | Label Printer Tape RoHS Compliant: NA |
| AD9944 | Complete 10-Bit and 12-Bit, 25 MHz CCD Signal Processors |
| AD9943KCPZRL | Complete 10-Bit and 12-Bit, 25 MHz CCD Signal Processors |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9942BBCZ | 功能描述:IC PROCESSOR SGNL 14B 100CSPBGA RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數據傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| AD9942BBCZRL | 功能描述:IC PROCESSOR SGNL 14B 100CSPBGA RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數據傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| AD9943 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete 10-Bit and 12-Bit, 25 MHz CCD Signal Processors |
| AD9943KCP | 制造商:Analog Devices 功能描述:AFE Video 1ADC 10-Bit 3V 32-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:10 BIT 25 MHZ LOW COST ANALOG FRONT END - Bulk |
| AD9943KCPRL | 制造商:Analog Devices 功能描述:AFE Video 1ADC 10-Bit 3V 32-Pin LFCSP EP T/R |
發布緊急采購，3分鐘左右您將得到回復。