- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385549 > MAX7445EUD (MAXIM INTEGRATED PRODUCTS INC) 4-Channel Video Reconstruction Filter PDF資料下載
參數(shù)資料
| 型號： | MAX7445EUD |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | 4-Channel Video Reconstruction Filter |
| 中文描述： | QUAD CONTINUOUS TIME FILTER, BUTTERWORTH, LOWPASS, PDSO14 |
| 封裝： | 4.40 MM, MO-153, TSSOP-14 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 249K |
| 代理商： | MAX7445EUD |
M
4-Channel Video Reconstruction Filter
6
_______________________________________________________________________________________
High-Frequency Boost
The high-frequency boost available on the CVBS, Y, and
C video channels increases image sharpness by com-
pensating for signal degradation and roll-off in the video
encoder. Table 2 shows the channels that have the high-
frequency boost option for the three operating modes.
The channels without high-frequency boost have a flat
response over the video bandwidth.
Output Buffers
Each output buffer can drive two 150
video loads with
a 2V
P-P
signal. The output buffer gain is selectable
between +6dB, +9.5dB, or +12dB by using GAIN (see
Table 3). The MAX7445 can drive an AC load or drive
the video load directly without using a large output
capacitor. The output buffers drive DC loads with an
output blanking level of less than 1V.
12dB Gain Setting
GAIN is biased internally to V
CC
/ 2 with a resistor-
divider pair of 100k
resistors from V
CC
to GND such
that the internal impedance at the node is 50k
. No
additional connection is necessary since the input
offers a minimum noise-margin immunity of 1V
P-P
.
Output Clamp Level
When sync pulses are detected in either a CVBS or G
video signal, the DC restore loop is activated. The func-
tion of the loop is to set the DC level of the video signal
to a specified voltage. See Table 4 for clamp levels.
Applications Information
Input Considerations
Use 0.1μF ceramic capacitors to AC-couple the inputs.
These input capacitors store a DC level so the outputs
are clamped to an appropriate DC voltage level.
Output Considerations
The outputs are typically connected to a 75
series
back-match resistor followed by the video cable.
Because of the inherent divide-by-two of this configura-
tion, the voltage on the video cable is always less than
1V, complying with industry-standard video require-
ments such as the European SCART standard (which
allows up to 2V of DC on the video cable). The video
buffer can also drive an AC-coupled video load. Good
video performance is achieved with an output capacitor
as low as 220μF.
Power-Supply Bypassing and Layout
The MAX7445 operates from a single +5V supply.
Bypass V
CC
to GND with a 0.1μF capacitor. Place all
external components as close to the device as possible.
Table 2. High-Frequency Boost for Each
Mode
HIGH-FREQUENCY BOOST (dB)
MODE 1
MODE 2
+1.2
+1.2
–
+1.2
–
+1.2
–
+1.2
CHANNEL
MODE 3
–
–
–
+1.2
A
B
C
D
Table 3. Gain Setting Control
GAIN
GND
V
CC
Floating
BUFFER GAIN (dB)
+6
+9.5
+12
Table 4. Output Clamp Level
MODE 1: SELECT = GND
CLAMP LEVEL (V)
0.8
1.4
1.4
1.4
MODE 2: SELECT = V
CC
CLAMP LEVEL (V)
0.8
0.8
1.6
0.8
MODE 3: SELECT = FLOATING
CLAMP LEVEL (V)
0.8
1.4
1.4
0.8
CHANNEL
SYNC SOURCE
Channel A
Channel A
Channel A
Channel A
SYNC SOURCE
Channel A
Channel A
Channel A
Channel D
SYNC SOURCE
Channel A
Channel A
Channel A
Channel D
A
B
C
D
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX7446 | 4-Channel Video Filter for RGB and CVBS Video |
| MAX7446EUD | 4-Channel Video Filter for RGB and CVBS Video |
| MAX7448 | 4-Channel RGB Video Filter with Asynchronous CVBS Input |
| MAX7448EUD | 4-Channel RGB Video Filter with Asynchronous CVBS Input |
| MAX7449 | 3-Channel Video Reconstruction Filter for RGB Component Video |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7445EUD+ | 功能描述:有源濾波器 Integrated Circuits (ICs) RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7445EUD+T | 功能描述:有源濾波器 Integrated Circuits (ICs) RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7445EUD-T | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7445EVKIT | 功能描述:有源濾波器 Programmers, Development Systems RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7446EUD | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。