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參數(shù)資料
| 型號(hào)： | AD9995 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12-Bit CCD Signal Processor with Precision Timing ⑩ Generator |
| 中文描述： | 12位CCD信號(hào)處理器與精密計(jì)時(shí)⑩發(fā)生器 |
| 文件頁數(shù)： | 36/60頁 |
| 文件大?。?/td> | 1593K |
| 代理商： | AD9995 |
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AD9995
–36–
CIRCUIT LAYOUT INFORMATION
The AD9995 typical circuit connection is shown in Figure 38.
The PCB layout is critical in achieving good image quality from
the AD999x products. All of the supply pins, particularly the
AVDD1, TCVDD, RGVDD, and HVDD supplies, must be
decoupled to ground with good quality, high frequency chip
ca
pacitors. The decoupling capacitors should be located as
close as possible to the supply pins and should have a very low
impedance path to a continuous ground plane. There should
also be a 4.7 μF or larger value bypass capacitor for each main
supply—AVDD, RGVDD, HVDD, and DRVDD—although
this is not necessary for each individual pin. In most applica
tions,
it is easier to share the supply for RGVDD and HVDD, which
may be done as long as the individual supply pins are separately
bypassed. A separate 3 V supply may also be used for DRVDD,
but this supply pin should still be decoupled to the same ground
plane as the rest of the chip. A separate ground for DRVSS is
not recommended. It is recommended that the exposed paddle
on the bottom of the package be soldered to a large pad, with
multiple vias connecting the pad to the ground plane.
The analog bypass pins (REFT, REFB) should also be carefully
decoupled to ground as close as possible to their respective pins.
The analog input (CCDIN) capacitor should also be located
close to the pin.
The H1–H4 and RG traces should be designed to have low
inductance to avoid excessive distortion of the signals. Heavier
traces are recommended because of the large transient cur-
rent demand on H1–H4 by the CCD. If possible, locating the
AD9995 physically closer to the CCD will reduce the inductance
on these lines. As always, the routing path should be as direct as
possible from the AD9995 to the CCD.
The AD9995 also contains an on-chip oscillator for driving an
external crystal. Figure 39 shows an example application using
a typical 24 MHz crystal. For the exact values of the external
resistors and capacitors, it is best to consult with the crystal
manufacturer’s data sheet.
20pF
D
35
20pF
CLI
CLO
AD9995
24MHz
XTAL
34
1M
500M
Figure 39. Crystal Driver Application
OUTPUT FROM CCD
12
DATA OUTPUTS
LINE/FIELD/DCLK TO ASIC/DSP
3V
ANALOG
SUPPLY
EXTERNAL SYNC FROM ASIC/DSP
3
3
SERIAL INTERFACE TO ASIC OR DSP
TO STROBE CIRCUIT
TO MECHANICAL SHUTTER CIRCUIT
3V
ANALOG
SUPPLY
4.7
F
3V
RG
SUPPLY
3V
H1–H4
SUPPLY
5
+
MASTER CLOCK INPUT
12
V1–V4,
VSG1–VSG4,
SUBCK
TO V-DRIVER
3V
DRIVER
SUPPLY
VSUB TO CCD
RG, H1–H4 TO CCD
+
+
TOP VIEW
AD9995
PIN 1
42 SDI
41 SL
40 REFB
39 REFT
38 AVSS
37 CCDIN
36 AVDD
35 CLI
34 CLO
33 TCVDD
32 TCVSS
31 RGVDD
30 RG
29 RGVSS
D5 1
D6 2
D7 3
D8 4
D9 5
D10 6
D11 7
DRVDD 8
DRVSS 9
VSUB 10
SUBCK 11
V1 12
V2 13
V3 14
5
5
5
5
5
5
5
4
4
4
4
4
4
4
V
V
V
V
V
V
V
H
H
H
H
H
H
+
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
4.7
F
4.7
F
4.7
F
1
F
1
F
Figure 38. Typical Circuit Configuration
REV. 0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9995KCP | 制造商:Analog Devices 功能描述:AFE Video 1ADC 12-Bit 3V 56-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:12 BIT 36 MSPS ANALOG FRONT END CONVERTE - Bulk |
| AD9995KCPRL | 制造商:Analog Devices 功能描述:AFE Video 1ADC 12-Bit 3V 56-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD9995KCPZ | 功能描述:IC CCD SIGNAL PROCESSOR 56-LFCSP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測(cè)器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
| AD9995KCPZRL | 功能描述:IC CCD SIGNAL PROCESSOR 56-LFCSP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測(cè)器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
| AD9995KCPZRL7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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