參數(shù)資料
型號(hào)： ADV7183AKST
廠商： ANALOG DEVICES INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： Multiformat SDTV Video Decoder
中文描述： COLOR SIGNAL DECODER, PQFP80
封裝： LEAD FREE, MS-026-BEC, LQFP-80
文件頁(yè)數(shù)： 101/104頁(yè)
文件大?。?/td> 894K
代理商： ADV7183AKST
ADV7183A
Digital Inputs
The digital inputs on the ADV7183A were designed to work
with 3.3 V signals, and are not tolerant of 5 V signals. Extra
components are needed if 5 V logic signals are required to be
applied to the decoder.
Antialiasing Filters
For inputs from some video sources that are not bandwidth
limited, signals outside the video band can alias back into the
video band during A/D conversion and appear as noise on the
output video. The ADV7183A oversamples the analog inputs by
a factor of 4. This 54 MHz sampling frequency reduces the
requirement for an input filter; for optimal performance it is
recommended that an antialiasing filter be employed. The
recommended low cost circuit for implementing this buffer and
filter circuit for all analog input signals is shown in Figure 41.
Rev. A | Page 101 of 104
The buffer is a simple emitter-follower using a single npn
transistor. The antialiasing filter is implemented using passive
components. The passive filter is a third-order Butterworth
filter with a -3dB point of 9MHz. The frequency response of the
passive filter is shown in Figure 40. The flat pass band up to
6 MHz is essential. The attenuation of the signal at the output of
the filter due to the voltage divider of R24 and R63 is compen-
sated for in the ADV7183A part using the automatic gain
control. The ac coupling capacitor at the input to the buffer
creates a high-pass filter with the biasing resistors for the
transistor. This filter has a cut-off of
{2 × π × (R39||R89) × C93}
–1
= 0.62 Hz
It is essential that the cutoff of this filter be less than 1 Hz to
ensure correct operation of the internal clamps within the part.
These clamps ensure that the video stays within the 5 V range of
the op amp used.
0
–20
–40
–60
–80
–100
–120
100kHz
30MHz
10MHz
3MHz
1MHz
300kHz
300MHz
1GHz
100MHz
0
FREQUENCY
Figure 40. Third-Order Butterworth Filter Response
相關(guān)PDF資料
PDF描述
ADV7330 Multiformat 11-Bit Triple DAC Video Encoder
ADV7330KST Multiformat 11-Bit Triple DAC Video Encoder
ADXL321 Small and Thin 18 g Accelerometer
ADXL321EB Small and Thin 18 g Accelerometer
ADXL321JCP Small and Thin 18 g Accelerometer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7183AKST-U1 制造商:Analog Devices 功能描述:VID DECODER 80LQFP - Bulk
ADV7183AKST-X2 制造商:Analog Devices 功能描述:VID DECODER - Bulk
ADV7183AXST 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk
ADV7183AXST-X2 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk
ADV7183AXT 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*