- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375249 > AD9887 (Analog Devices, Inc.) Dual Interface for Flat Panel Displays PDF資料下載
參數(shù)資料
| 型號(hào)： | AD9887 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual Interface for Flat Panel Displays |
| 中文描述： | 雙接口的平板顯示器 |
| 文件頁(yè)數(shù)： | 17/40頁(yè) |
| 文件大?。?/td> | 321K |
| 代理商： | AD9887 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)當(dāng)前第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)
REV. 0
AD9887
–17–
ADC
DAC
DAC
7
8
OFFSET
GAIN
REF
x1.2
IN
CLAMP
V
OFF
8
Figure 8. ADC Block Diagram (Single Channel Output)
1V
I
V
(128 CODES)
I
0.5V
V
OFF
(128 CODES)
O
R
0V
0V
O
Figure 9. Relationship of Offset Range to Input Range
SCAN Function
The SCAN function is intended as a pseudo JTAG function for
manufacturing test of the board. The ordinary operation of the
AD9887 is disabled during SCAN.
To enable the SCAN function, set register 14h, bit 2 to 1. To
SCAN in data to all 48 digital outputs, apply 48 serial bits of
data and 48 clocks (typically 5 MHz, max of 20 MHz) to the
SCAN
IN
and SCAN
CLK
pins respectively. The data is shifted
in on the rising edge of SCAN
CLK
. The first serial bit shifted
in will appear at the RED A<7> output after one clock cycle.
After 48 clocks, the first bit is shifted all the way to the BLU
B<0>. The 48th bit will now be at the RED A<7> output. If
SCAN
CLK
continues after 48 cycles, the data will continue to be
shifted from RED A<7> to BLU B<0> and will come out of the
SCAN
OUT
pin as serial data on the falling edge of SCAN
CLK
.
This is illustrated in Figure 10. A setup time (t
SU
) of 3 ns
should be plenty and no hold time (t
HOLD
) is required (
≥
0 ns).
This is illustrated in Figure 11.
t
SU
= 3ns
t
HOLD
= 0ns
SCANCLK
SCANIN
Figure 11. SCAN Setup and Hold
Alternate Pixel Sampling Mode
A Logic 1 input on Clock Invert (CKINV, Pin 94) inverts the
nominal ADC clock. CKINV can be switched between frames
to implement the alternate pixel sampling mode. This allows
higher effective image resolution to be achieved at lower pixel
rates but with lower frame rates.
On one frame, only even pixels are digitized. On the subsequent
frame, odd pixels are sampled. By reconstructing the entire
frame in the graphics controller, a complete image can be recon-
structed. This is very similar to the interlacing process that is
employed in broadcast television systems, but the interlacing is
vertical instead of horizontal. The frame data is still presented to
the display at the full desired refresh rate (usually 60 Hz) so no
flicker artifacts are added.
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
O
O
O
O
O
O
O
O
O
O
O
E
E
E
E
E
E
E
E
E
E
E
Figure 12. Odd and Even Pixels in a Frame
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
O 1 O 1 O 1 O 1 O 1 O 1
Figure 13. Odd Pixels from Frame 1
X
BIT 1
BIT 2
X
X
X
BIT 1
BIT 2
BIT 47
BIT 48
X
BIT 46
BIT 47
BIT 48
X
SCANCLK
RED A<7>
BLUE B<0>
SCANOUT
SCANIN
BIT 1
BIT 2
BIT 3
BIT 1
BIT 2
BIT 3
X
X
X
X
X
X
Figure 10. SCAN Timing
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9888 | 100/140/170/205 MSPS Analog Flat Panel Interface |
| AD9888KS-100 | 100/140/170/205 MSPS Analog Flat Panel Interface |
| AD9888KS-140 | TRI N PLUG F 2-13 |
| AD9888KS-170 | TRI N RECP M FLG 2-13 |
| AD9888KS-205 | TRI N RECP M J/N 2-13 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9887/PCB | 制造商:Analog Devices 功能描述:INTRFC DUAL FOR FLAT PNL DISPLAYS 160MQFP - Bulk |
| AD9887A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Interface for Flat Panel Displays |
| AD9887A/PCB | 制造商:Analog Devices 功能描述:INTRFC FOR FLAT PNL DISPLAY 16SOIC W - Bulk |
| AD9887AKS-100 | 制造商:Analog Devices 功能描述:Interface for Flat Panel Display 160-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:DUAL A/D INTERFACE FOR FLAT PANEL - Bulk |
| AD9887AKS-140 | 制造商:Rochester Electronics LLC 功能描述:DUAL A/D INTERFACE FOR FLAT PANEL - Bulk 制造商:Analog Devices 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。