參數(shù)資料
型號(hào)： ADV7150
廠商： Analog Devices, Inc.
英文描述： CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC(三通道,10位視頻RAM-D/A轉(zhuǎn)換器)
中文描述： 220兆赫的CMOS真彩色圖形三路10位顯存，數(shù)模轉(zhuǎn)換器（三通道，10位視頻RAM的的D / A轉(zhuǎn)換器）
文件頁(yè)數(shù)： 26/36頁(yè)
文件大?。?/td> 434K
代理商： ADV7150
ADV7150
–26–
REV. A
APPE NDIX 1
BOARD DE SIGN AND LAY OUT CONSIDE RAT IONS
V
AA
V
REF
R
SET
IOR
IOG
IOB
I
PLL
GND
COMP
IOR
IOG
IOB
R
SET
280
1k
(1% METAL)
AD589
(1.2V REF)
0.1
μ
F
+5V (V
AA
)
75
75
75
75
75
75
COMPLEMENTARY
OUTPUTS
CO-AXIAL CABLE
(75
)
BNC
CONNECTORS
MONITOR
(CRT)
+5V (V
AA
)
0.1
μ
F
ANALOG POWER PLANE
33
μ
F
0.1
μ
F
0.01
μ
F
0.1
μ
F
0.01
μ
F
0.1
μ
F
0.01
μ
F
0.1
μ
F
0.01
μ
F
+5V (V
AA
)
0.1
μ
F
+5V (V
CC
)
L1
(FERRITE BEAD)
NOTES:
1. ALL RESISTORS ARE 1% METAL FILM
2. 0.1
μ
F AND 0.01
μ
F CAPACITORS ARE CERAMIC
3. ADDITIONAL DIGITAL CIRCUITRY OMITTED FOR CLARITY
ADV7150
POWER SUPPLY DECOUPLING (0.1
μ
F AND 0.01
μ
F CAPACITOR FOR EACH V
AA
GROUP)
Recommended Analog Circuit Layout
power plane (V
CC
) at a single point through a ferrite bead. T his
bead should be located within three inches of the ADV7150.
T he PCB power plane should provide power to all digital logic
on the PC board, and the analog power plane should provide
power to all ADV7150 power pins and voltage reference circuitry.
Plane-to-plane noise coupling can be reduced by ensuring that
portions of the regular PCB power and ground planes do not
overlay portions of the analog power plane, unless they can be
arranged such that the plane-to-plane noise is common mode.
Supply Decoupling
For optimum performance, bypass capacitors should be installed
using the shortest leads possible, consistent with reliable opera-
tion, to reduce the lead inductance. Best performance is obtained
with 0.1
μ
F ceramic capacitor decoupling. Each group of V
AA
pins on the ADV7150 must have at least one 0.1
μ
F decoupling
capacitor to GND. T hese capacitors should be placed as close
as possible to the device.
It is important to note that while the ADV7150 contains cir-
cuitry to reject power supply noise, this rejection decreases with
frequency. If a high frequency switching power supply is used,
the designer should pay close attention to reducing power sup-
ply noise and consider using a three terminal voltage regulator
for supplying power to the analog power plane.
T he ADV7150 is a highly integrated circuit containing both
precision analog and high speed digital circuitry. It has been
designed to minimize interference effects on the integrity of the
analog circuitry by the high speed digital circuitry. It is impera-
tive that these same design and layout techniques be applied to
the system level design such that high speed, accurate perfor-
mance is achieved. T he “Recommended Analog Circuit Layout”
shows the analog interface between the device and monitor.
T he layout should be optimized for lowest noise on the ADV7150
power and ground lines by shielding the digital inputs and pro-
viding good decoupling. T he lead length between groups of V
AA
and GND pins should by minimized so as to minimize inductive
ringing.
Ground Planes
T he ground plane should encompass all ADV7150 ground pins,
voltage reference circuitry, power supply bypass circuitry for the
ADV7150, the analog output traces, and all the digital signal
traces leading up to the ADV7150. T he ground plane is the
graphics board’s common ground plane.
Power Planes
T he ADV7150 and any associated analog circuitry should have
its own power plane, referred to as the analog power plane (V
AA
).
T his power plane should be connected to the regular PCB
相關(guān)PDF資料
PDF描述
ADV7151LS110 CAP METAL POLYPRO .22UF 630V 5%
ADV7151LS135 CMOS 220 MHz Pseudo-Color Graphics Triple 10-Bit Video RAM-DAC
ADV7151LS170 CMOS 220 MHz Pseudo-Color Graphics Triple 10-Bit Video RAM-DAC
ADV7151LS220 CAP METAL POLYPRO .24UF 630V 3%
ADV7151LS85 CAP METAL POLYPRO .24UF 630V 5%
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7150KS110 制造商:Rochester Electronics LLC 功能描述:- Bulk
ADV7150LS110 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
ADV7150LS135 制造商:Rochester Electronics LLC 功能描述:- Bulk
ADV7150LS170 制造商:Rochester Electronics LLC 功能描述:- Bulk
ADV7150LS220 制造商:Analog Devices 功能描述:
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