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參數(shù)資料
| 型號(hào)： | MAX9511CEG+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 14/15頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC INTERFACE VGA 24-QSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 應(yīng)用： | 驅(qū)動(dòng)器 |
| 電路數(shù)： | 3 |
| 轉(zhuǎn)換速率： | 1100 V/µs |
| 電流 - 電源： | 38mA |
| 電流 - 輸出 / 通道： | 40mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-QSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁(yè)面： | 1424 (CN2011-ZH PDF) |
| 其它名稱： | MAX9511CEG+TDKR |
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MAX9511
RGBHV Driver with EMI Suppression
8
_______________________________________________________________________________________
Detailed Description
The MAX9511 solves several difficult problems in inter-
facing a video graphics controller to a VGA port and/or
the docking station connector. First, there is a trade-off
between video quality and EMI. The usual method for
reducing EMI is to insert a fixed-frequency LC π-filter
between the video DAC output and the connector. Given
the large component variation of the capacitors and
inductors, the frequency response is sharply reduced to
meet EMI requirements. As a result, video quality suffers
making sharp transitions in the video soft. The MAX9511
video drivers have a variable slew rate, which limits elec-
tromagnetic emissions and can be adjusted by an exter-
nal resistor. As a result, the slew rate of the MAX9511 can
be varied to reduce electromagnetic emissions at a given
resolution, maximizing video quality. Since the slew rate
is variable and set by a resistor instead of fixed by
capacitors and inductors, video performance and elec-
tromagnetic emissions are consistent during production.
The MAX9511 also has horizontal and vertical sync out-
put drivers, bidirectional level translators for DDC sup-
port, and external load-detection circuits that correctly
transfer information about the external load to the video
graphics controller.
Load Detection
Most notebook computers implement a power-saving
load-detection circuit that disables the external monitor
output when no monitor is plugged into the rear panel
VGA connector as shown in Figure 1. Upon startup or on
command, the video controller generates a sequence of
detection pulses out of the current DAC shown, that
results in an output voltage of above 315mV when an
external monitor (RL) is connected, and above 630mV
when disconnected. If the monitor is disconnected at the
time of the pulse, the comparator inside the notebook
trips and disables the video. When the monitor is
plugged in, the resulting pulse will not trip the comparator
and the video is enabled.
If the lowpass filter is simply replaced with an amplifier,
the monitor termination RL is isolated from the video
controller and the conventional load-detection scheme
does not work.
For this reason, the MAX9511 includes the load-detection
circuit. When RL is connected (i.e., the monitor is plugged
in) to the output of the MAX9511, the internal load-detec-
tion circuit disconnects the synthesized -75 resistor
from the input. The resulting 37.5 resistance at the DAC
output indicates to the DAC’s internal load-detection cir-
cuit that the monitor is plugged in. Removing RL (i.e., dis-
connecting the monitor) causes the MAX9511’s
load-detection circuit to connect the synthesized -75
VDD1
VDD2
RPI
RSI
RPI
RB
RPO
DDC_DATA_IN
DDC_CLK_IN
H_SYNC_IN
V_SYNC_IN
AGND
V_SYNC_OUT
H_SYNC_OUT
DDC_CLK_OUT
DDC_DATA_OUT
BLUE_OUT
GREEN_OUT
RED_OUT
SHDN
RX
DGND
BLUE_IN
RED_IN
GREEN_IN
RISENSE
VCC
VY
VX
MAX9511
-75
RISENSE
VY
VX
-75
RISENSE
VY
VX
-75
RPO
RSO
RB
RSI
RSO
Block Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9511EVKIT | 功能描述:視頻 IC MAX9511 EVAL KIT 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 |
| MAX9512AEE+ | 制造商:Maxim Integrated Products 功能描述:VID AMP QUAD 3.6V - Rail/Tube |
| MAX9512AEE+T | 制造商:Maxim Integrated Products 功能描述:VID AMP QUAD 3.6V 16QSOP - Tape and Reel |
| MAX9512ATE+ | 功能描述:視頻放大器 Video Filter Amp 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 |
| MAX9512ATE+T | 功能描述:視頻放大器 Video Filter Amp 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 |
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