500 MHz, Triple 16 × 9
Video Crosspoint Switch
Data Sheet
Rev. B
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FEATURES
High channel count, triple 16 × 9 high speed, non-blocking
switch array
Differential or single-ended operation
Supports sync-on common-mode and sync-on color
operating modes
Decoded HV sync outputs available
G = +2 operation (differential input to differential output)
Flexible power supplies: +5 V or ±2.5 V
Logic ground for convenient control interface
Serial or parallel programming of switch array
High impedance output disable allows connection of
multiple devices with minimal loading on output bus
Adjustable output CM and black level through external pins
Excellent ac performance (to support 1600 × 1200 @ 85 Hz)
Bandwidth: 500 MHz
Slew rate: 1800 V/s
Settling time: 4 ns to 1%
Low power of 3.5 W
Low all-hostile crosstalk
88 dB @ 5 MHz
46 dB @ 500 MHz
Wide input common-mode range of 4 V
Reset pin allows disabling of all outputs
Fully populated 26 x 26 ball PBGA package
(27 mm x 27 mm, 1 mm ball pitch)
Convenient grouping of RGB signals for easy routing
APPLICATIONS
RGB video switching
KVM
Professional video
FUNCTIONAL BLOCK DIAGRAM
2
INPUT
RECEIVER
G = +1
OUTPUT
BUFFER
G = +1
9
144
S
E
T
IN
D
IV
ID
U
A
L,
OR
R
E
S
E
T
A
LL
OU
TP
U
TS
TO
OFF
E
NABL
E
/DI
S
ABL
E
45
VBLK
VOCM_CMENCON
VOCM_CMENCOFF
R
G
B
R
G
B
16
x
RG
B
CHANNE
L
S
CMENC
SERIN
RST
UPDATE
CS
CLK
WE
SER/PAR
D0 D1 D2 D3 D4 VPOS VNEG VDD
DGND
SEROUT
9
x
RG
B,
HV
CHANNE
L
S
H
B
G
R
V
H
B
G
R
V
45
A0
A1
A2
A3
AD8175
06478-
001
1
0
SWITCH
MATRIX
G = +2
45-BIT SHIFT
REGISTER WITH
5-BIT PARALLEL
LOADING
DECODE
9 × 5:16 DECODERS
PARALLEL LATCH
Figure 1.
GENERAL DESCRIPTION
The AD8175 is a high speed, triple 16 × 9 video crosspoint
switch matrix. It supports 1600 × 1200 RGB displays @ 85 Hz
refresh rate, by offering a 500 MHz bandwidth and a slew rate
of 1800 V/s. With 88 dB of crosstalk and 94 dB isolation
(@ 5 MHz), the AD8175 is useful in many high speed video
applications.
The AD8175 supports two modes of operation: differential-in
to differential-out mode with sync-on CM signaling passed
through the switch and differential-in to differential-out mode
with CM signaling removed through the switch. The output
CM and black level can be conveniently set via external pins.
The independent output buffers of the AD8175 can be placed
into a high impedance state to create larger arrays by paralleling
crosspoint outputs. Inputs can be paralleled as well. The
AD8175 offers both serial and parallel programming modes.
The AD8175 is packaged in a fully-populated 26 × 26 ball
PBGA package and is available over the extended industrial
temperature range of 40°C to +85°C.
