- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375268 > ADV476 (Analog Devices, Inc.) CMOS Monolithic Color Palette RAM-DAC(80MHz單片256×18彩色調(diào)色器RAM-D/A轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號(hào)： | ADV476 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CMOS Monolithic Color Palette RAM-DAC(80MHz單片256×18彩色調(diào)色器RAM-D/A轉(zhuǎn)換器) |
| 中文描述： | CMOS單片調(diào)色板RAM的發(fā)展援助委員會(huì)（80MHz的單片256 × 18彩色調(diào)色器RAM的的D / A轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | ADV476 |
ADV476
REV. B
–8–
Figure 5. RGB Video Output Waveform
T able V. Video Output T ruth T able
RE D, GRE E N,
BLUE , (mA)
1
DAC
Input Data
Description
BLANK
WHIT E LEVEL
VIDEO
BLACK LEVEL
BLANK LEVEL
19.05
Video
0
0
1
1
1
0
FFH
DAT A
00H
xxH
NOT E
1
T ypical with full Scale RED, GREEN, BLUE = 19.05 mA. I
REF
= 8.88 mA.
Reference Input
T he ADV476 requires an active current reference to enable the
DACs provide stable and accurate video output levels. T he rela-
tionship between the output voltage and the required input ref-
erence current is given by:
I
REF
=
VO
(
FULL SCALE
)
2.15
×
R
L
= 37.5
(for doubly terminated 75
load)
= 75
(for singly terminated 75
load)
VO
= 0.714 V
(RS-343A video levels)
= 1.0 V
(RS-170 video levels).
In a standard application which requires RS-343A video levels
to be driven into a doubly terminated 75
load (R
L
= 37.5
),
the necessary reference input current is:
I
REF
= 8.88
mA
.
T o drive the same levels into a singly terminated 75
load
(R
L
= 75
), the reference current is:
I
REF
= 4.44
mA
.
A suggested current reference design for the doubly terminated
case, with RS-343A video levels and based on the LM334, a
three-terminal adjustable current source, is shown in Figure 6.
where
R
L
and
Figure 6. Current Reference Design Using an LM334
Current Source
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV612 | Closed Circuit TV Digital Video Codec(閉路電視數(shù)字視頻編碼譯碼器) |
| ADV7129KS | 192-Bit, 360 MHz True-Color Video DAC with Onboard PLL |
| ADV7129 | 192-Bit, 360 MHz True-Color Video DAC with Onboard PLL(192位,360MHz,真彩色視頻D/A轉(zhuǎn)換器) |
| ADV7150LS85 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7150LS110 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV476KN35 | 制造商:Analog Devices 功能描述: |
| ADV476KN40 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV476KN40E | 制造商:Analog Devices 功能描述: |
| ADV476KN50 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS Monolithic 256x18 Color Palette RAM-DAC |
| ADV476KN50E | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。