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參數(shù)資料
| 型號： | MAX9524ATC+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC STD-DEF VID FILT AMP12TQFN-EP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 視頻濾波器 |
| 應用： | 照相機，手機、媒體播放器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-TQFN 裸露焊盤 |
| 供應商設(shè)備封裝： | 12-TQFN EP（3x3） |
| 包裝： | 帶卷 (TR) |
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
10
______________________________________________________________________________________
AC-Coupling the Outputs
The outputs can be AC-coupled because the output
stage can source and sink current as shown in Figure 1.
Coupling capacitors should be 220F or greater to keep
the highpass filter formed by the 150Ω equivalent resis-
tance of the video transmission line to a corner frequen-
cy of 4.8Hz or below. The frame rate of PAL systems is
25Hz, and the frame rate of NTSC systems is 30Hz. The
corner frequency should be well below the frame rate.
Changing Between Video Output and
Microphone Input on a Single Connector
A single pole on a mobile phone jack can be used for
transmitting a video signal to a television or receiving
the signal from the microphone of a headset. Figure 2
shows how the MAX9517 can transmit a video signal.
Figure 3 shows how the MAX9517 can receive and
pass on the signal from a microphone.
Switching Between Video
and Digital Signals
The dual SPST analog switches and the high-imped-
ance output of the video amplifier enable video trans-
mission, digital transmission, and digital reception all
on a single pole of a connector. Figures 4, 5, and 6
show the different configurations of the MAX9517.
Selecting Between Two Video Sources
The analog switches can multiplex between two video
sources. For example, a mobile phone might have an
application processor with an integrated video encoder
and a mobile graphics processor with an integrated
video encoder, each creating a composite video signal
that is between 0 and 1V. Figure 7 shows this application
in which the MAX9517 chooses between two internal
video sources. The two analog switches can be used as
a 2:1 multiplexer to select which video DAC output is
actually filtered, amplified, and then driven out to the
connector. Close switch 1 to select the video from the
application processor. Close switch 2 to select the video
from the mobile graphics processor.
Figure 8 shows the application in which the MAX9524
chooses between two external video sources with
unknown DC bias.
Y/C Mixer with Chroma Mute
If the video application processor has two current out-
put digital-to-analog converters (DACs) for luma (Y)
and chroma (C), respectively, then the signals can be
mixed together to create a composite video signal by
summing the currents into a single resistor, as shown in
Figure 9. The composite video signal should be AC-
coupled into the MAX9524 because the composite
video signal has a positive DC level shift. The sync-tip
clamp of the MAX9524 will re-establish the DC bias
level of the signal inside the chip.
The chroma current is connected to essentially a sin-
gle-pole, double-throw (SPDT) switch. In one position,
the switch routes the chroma current into the resistor. In
the other position, the switch routes the chroma current
into ground. For the Y/C mixer to work properly, the
chroma current must be routed through analog switch 1
into the resistor.
If the chroma signal needs to be muted, then the chroma
current is shunted to ground through analog switch 2.
Analog switch 1 stays open. See Figure 10.
NO1
COM1
NO2
COM2
IN1
IN2
MICROCONTROLLER
DAC
CVBS
75
Ω
CVBS
GND
+3.3V
APPLICATION
PROCESSOR
SHDN
VIDIN
LPF
BUFFER
AV = 2V/V
VDD
0.1
μF
MAX9517
220
μF
VIDOUT
Figure 1. AC-Coupled Outputs
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| MAX9524EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 MAX9517/24 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX9526AEI/V+ | 功能描述:視頻 IC NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX9526AEI/V+C68 | 功能描述:視頻 IC Low-Power High-Performance NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX9526AEI/V+T | 功能描述:視頻 IC NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX9526AEI+ | 功能描述:視頻 IC NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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