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參數資料
| 型號： | ADV7152LS135 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顯示控制器 |
| 英文描述： | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| 中文描述： | PALETTE-DAC DSPL CTLR, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁數： | 22/32頁 |
| 文件大小： | 454K |
| 代理商： | ADV7152LS135 |
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ADV7152
–22–
REV. B
DIGIT AL-T O-ANALOG CONVE RT E RS
(DACS) AND VIDE O OUT PUT S
T he ADV7152 contains three high speed video DACs. T he
DAC outputs are represented as the three primary analog color
signals IOR (red video), IOG (green video) and IOB (blue video).
Other analog signals on the part include I
PLL
and V
REF
as well as
complementary video outputs IOR, IOG, IOB. T hese comple-
mentary outputs can be used to drive differentially terminated
video loads, they will have equal but opposite output levels to
IOR, IOG and IOB when loaded with a resistive load similar to
IOR, IOG and IOB.
DACs and Analog Outputs
T he part contains three matched 10-bit digital-to-analog con-
verters. T he DACs are designed using an advanced, high speed,
segmented architecture. T he bit currents corresponding to each
digital input are routed to either IOR, IOG, IOB (bit = “1”) or
IOR
,
IOG
,
IOB
(bit = “0”). (Normally IOR, IOG, IOB = GND.)
T he analog video outputs are high impedance current sources.
Each of the these three RGB current outputs are specified to
directly drive a 37.5
load (doubly terminated 75
).
Z
=75
(S
TERMINATION)
DACs
IOR, IOG, IOB
Z
O
= 75
Z
L
= 75
(MONITOR)
(CABLE)
Figure 27. DAC Output Termination (Doubly Terminated
75
Load)
Reference Input and R
SE T
An external 1.23 V voltage reference is required to drive the
analog outputs of the ADV7152. T he reference voltage is con-
nected to the V
REF
input.
A resistor R
SET
is connected between the R
SET
input of the part
and ground. For specified performance, R
SET
has a value of
280
. T his corresponds to the generation of RS-343A video
levels (with
SYNC
on IOG and Pedestal = 7.5 IRE) into a dou-
bly terminated 75
load. Figure 28 illustrates the resulting
video waveform, and the Video Output T ruth T able shows the
corresponding control input stimuli.
WHITE LEVEL
BLACK LEVEL
92.5 IRE
7.5 IRE
40 IRE
IOR, IOB
IOG
mA
mA
V
V
26.67
1.000
0.714
19.05
1.44
0.054
9.05
0.340
0
0
0
0
7.62
0.286
BLANK LEVEL
SYNC LEVEL
GREYSCALE
Figure 28. Composite Video Waveform (
SYNC
Decoded on IOG; Pedestal = 7.5 IRE; R
SET
= 280
)
T able V. Video Output T ruth T able
IOG
(mA)
IOR, IOB
(mA)
DAC
Input Data
Description
SYNC
BLANK
WHIT E LEVEL
VIDEO
VIDEO to
BLANK
BLACK LEVEL
BLACK to
BLANK
BLANK
LEVEL
SYNC
LEVEL
26.67
Video + 9.05
Video + 1.44
9.05
1.44
7.62
0
19.05
Video + 1.44
Video + 1.44
1.44
1.44
0
0
1
1
0
1
0
1
0
1
1
1
1
1
0
0
3FFH
Data
Data
000H
000H
xxxH
xxxH
相關PDF資料 |
PDF描述 |
|---|---|
| ADV7152LS170 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7152LS220 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7160 | 96-Bit, 220 MHz True-Color Video RAM-DAC(96位,220MHz,真彩色視頻RAM-D/A轉換器) |
| ADV7162 | 96-Bit, 220 MHz True-Color Video RAM-DAC(96位,220MHz,真彩色視頻RAM-D/A轉換器) |
| ADV7162KS140 | 96-Bit, 220 MHz True-Color Video RAM-DAC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV7152LS170 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7152LS220 | 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:PALETTE-DAC DSPL CTLR, PQFP100 |
| ADV7152LS85 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7160 | 制造商:AD 制造商全稱:Analog Devices 功能描述:96-Bit, 220 MHz True-Color Video RAM-DAC |
| ADV7160KS140 | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:220 MHZ VIDEO RAM DAC I.C. - Bulk |
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