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參數(shù)資料
| 型號： | AD9888KS-140 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | TRI N PLUG F 2-13 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | PLASTIC, MQFP-128 |
| 文件頁數(shù)： | 28/32頁 |
| 文件大?。?/td> | 249K |
| 代理商： | AD9888KS-140 |
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REV. A
AD9888
–28–
SCL
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ACK
SDA
Figure 24. Serial Interface—Typical Byte Transfer
SOGIN0
HSYNC0
COAST
MUX2
SYNC SLICER
SOGIN1
HSYNC1
NEGATIVE PEAK
CLAMP
COMP
SYNC
SYNC SEPARATOR
SOGOUT
HSYNCOUT
VSYNCOUT
ACTIVITY
DETECT
POLARITY
DETECT
POLARITY
DETECT
ACTIVITY
DETECT
POLARITY
DETECT
MUX3
MUX4
CLOCK
GENERATOR
MUX5
MUX5
ACTIVITY
DETECT
MUX1
INTEGRATOR
1/S
VSYNC0
VSYNC1
MUX5
PIXEL CLOCK
VSYNC
PLL
Figure 25. Sync Processing Block Diagram
The AD9888 can digitize graphics signals over a very wide range
of frequencies (10 MHz to 205 MHz). Often characteristics that
are beneficial at one frequency can be detrimental at another.
Analog bandwidth is one such characteristic. For UXGA resolu-
tions (up to 205 MHz), a very high analog bandwidth is desirable
because of the fast input signal slew rates. For VGA and lower
resolutions (down to 12.5 MHz), a very high bandwidth is not
desirable, because it allows excess noise to pass through. To
accommodate these varying needs, the AD9888 includes vari-
able analog bandwidth control. Four settings are available
(75 MHz, 150 MHz, 300 MHz, and 500 MHz), allowing the
analog bandwidth to be matched with the resolution of the
incoming graphics signal.
Power Supply Bypassing
It is recommended to bypass each power supply pin with a 0.1
μ
F
capacitor. The exception is in the case where two or more supply
pins are adjacent to each other. For these groupings of powers/
grounds, it is only necessary to have one bypass capacitor. The
fundamental idea is to have a bypass capacitor within about
0.5 cm of each power pin. Also, avoid placing the capacitor on
the opposite side of the PC board from the AD9888, as that
interposes resistive vias in the path.
The bypass capacitors should be physically located between the
power plane and the power pin. Current should flow from the
power plane => capacitor => power pin. Do not make the power
connection between the capacitor and the power pin. Placing a
via underneath the capacitor pads, down to the power plane, is
generally the best approach.
It is particularly important to maintain low noise and good
stability of PVd (the clock generator supply). Abrupt changes in
PVd can result in similarly abrupt changes in sampling clock
phase and frequency. This can be avoided by careful attention
to regulation, filtering, and bypassing. It is highly desirable to
provide separate regulated supplies for each of the analog cir-
cuitry groups (Vd and PVd).
Some graphic controllers use substantially different levels of
power when active (during active picture time) and when idle
(during horizontal and vertical sync periods). This can result in
a measurable change in the voltage supplied to the analog supply
regulator, which can in turn produce changes in the regulated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9888KS-170 | 制造商:Analog Devices 功能描述:ADC Triple 170Msps 8-bit Parallel 128-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:170MHZ ANALOG GRAPHICS INTERFACE CHIP - Bulk 制造商:Analog Devices 功能描述:IC INTERFACE GRAPHIC |
| AD9888KS-205 | 制造商:Analog Devices 功能描述:ADC Triple 205Msps 8-bit Parallel 128-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:205MHZ ANALOG GRAPHICS INTERFACE CHIP - Bulk 制造商:Analog Devices 功能描述:IC INTERFACE GRAPHIC |
| AD9888KSZ-100 | 功能描述:IC FLAT PANEL INTERFACE 128-MQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| AD9888KSZ-140 | 功能描述:IC FLAT PANEL INTERFACE 128-MQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| AD9888KSZ-140 | 制造商:Analog Devices 功能描述:IC ANALOG INTERFACE |
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