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參數(shù)資料
| 型號： | MAX9504AEUT+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/16頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VIDEO HI CUR SOT23-6 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | 通用 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 47MHz |
| 轉(zhuǎn)換速率： | 165 V/µs |
| 電流 - 電源： | 5mA |
| 電流 - 輸出 / 通道： | 110mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-6 |
| 供應(yīng)商設(shè)備封裝： | SOT-6 |
| 包裝： | 帶卷 (TR) |
MAX9504A/MAX9504B
Applications Information
Using the MAX9504A/MAX9504B
with Video Current DACs
Video current DACs source current into a resistor con-
nected to ground. The output voltage range for com-
posite video and luma (Y) is usually from ground up to
1V (see Figure 1). Notice that the sync tip is quite close
to ground. Standard single-supply amplifiers with rail-
to-rail outputs have difficulty amplifying input signals at
or near ground because their output stages enter a
nonlinear mode of operation when the output is pulled
close to ground.
The MAX9504B level shifts the input signal up by
160mV so that the output has a positive DC offset of
320mV. As a result, the MAX9504B output stage always
operates in the linear mode. Even if the input signal is
at ground, the MAX9504B output is at 320mV.
At the output of a video current DAC, the blank level of
the chroma signal is usually between 500mV to 650mV.
The voltage swing above and below the blank level is
approximately ±350mV (see Figure 1). If the blank level
is 550mV, then the lowest voltage for the chroma signal
is 200mV. For the case of chroma signals, no input
level shift is needed because 200mV gained up by two
is 400mV, which is well within the linear output range of
the MAX9504A or MAX9504B. Since the MAX9504A
does not have an input level shift, the MAX9504A
should be used with chroma signals. In summary, use
the MAX9504B with composite video and luma signals
from a DAC, and use the MAX9504A with chroma sig-
nals from a DAC.
Using the MAX9504A/MAX9504B with a
Video Reconstruction Filter
In most video applications, the video signal generated
from the DAC requires a reconstruction filter to smooth
out the steps and reduce the spikes. The MAX9504 has
a high-impedance, DC-coupled input that can be con-
nected directly to the reconstruction filter.
For standard-definition video, the video passband is
approximately 6MHz, and the DAC sampling clock is
27MHz. Normally, a 9MHz lowpass filter can be used
for the reconstruction filter. This section demonstrates
the methods to build simple 2nd- and 3rd-order pas-
sive Butterworth lowpass filters with 9MHz cutoff fre-
quency. See Figures 2 and 3.
3V/5V, 6dB Video Amplifiers with
High Output-Current Capability
8
_______________________________________________________________________________________
MAX9504 fig01
10s/div
GND
LUMA
500mV/div
CHROMA
500mV/div
GND
Figure 1. Oscilloscope Trace of Luma and Chroma Signals
from Video Current DAC
R2
150
R1
150
C1
150pF
L1
3.9H
R3
75
C7
0.1F
IN
OUT
GND
FB
SHDN
VCC
VOUT
VIDEO
CURRENT
DAC
2-POLE RECONSTRUCTION LPF
MAX9504
Figure 2. 2nd-Order Butterworth LPF with MAX9504
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9504BELT | 制造商:Maxim Integrated Products 功能描述:3V/5V 6DB VIDEO AMPLIFIERS WITH HI - Rail/Tube |
| MAX9504BELT+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9504BELT+T | 功能描述:視頻放大器 3V/5V 6dB Video Amplifier RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9504BELT-T | 功能描述:視頻放大器 RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9504BEUT+ | 制造商:Maxim Integrated Products 功能描述:VID AMP SGL 3V/5V 6PIN SOT-23 - Rail/Tube |
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