475 MHz, Triple 16 × 9
Video Crosspoint Switch
AD8176
Preliminary Technical Data
FEATURES
FUNCTIONAL BLOCK DIAGRAM
D0 D1 D2 D3 D4 VPOS VNEG VDD DGND
Large, triple 16 x 9 high speed, non-blocking switch array
Differential or single-ended operation
Supports sync-on common-mode and sync-on color
operating modes
RGB and HV outputs available for driving monitor directly
G = +4 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
AD8176
A0
A1
A2
A3
SERIN
SER/PAR
45-BIT SHIFT
REGISTER WITH
5-BIT PARALLEL
LOADING
1
0
WE
SEROUT
CLK
45
CS
UPDATE
RST
PARALLEL LATCH
CMENC
45
9
DECODE
9 × 5:16 DECODERS
Bandwidth: 475 MHz
Slew rate: 1800 V/μs
Settling time TBD ns to 1% to support 1600 × 1200 @ 85Hz
Low power of 3.5 W
144
INPUT
RECEIVER
G = +2
OUTPUT
BUFFER
G = +1
Low all-hostile crosstalk
−68 dB @ 5 MHz
−40 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)
2
2
2
2
2
2
R
G
B
R
G
B
H
V
SWITCH
MATRIX
G = +2
Convenient grouping of RGB signals for easy routing
2
2
2
2
APPLICATIONS
R
G
B
R
G
B
H
V
2
2
RGB video switching
KVM
Professional video
VBLK
VOCM_CMENCON
VOCM_CMENCOFF
Figure 1. AD8176
GENERAL DESCRIPTION
black level can be can be conveniently set via external pins. The
outputs can be used single-ended in conjunction with decoded
H and V outputs to drive a monitor directly.
The AD8176 is a high speed, triple 16 × 9 video crosspoint
switch matrix. It supports 1600 × 1200 RGB displays @ 85 Hz
refresh rate, by offering a 475 MHz bandwidth and a slew rate
of 1800 V/μs. With −68 dB of crosstalk and TBD dB isolation
(@ 5 MHz), the AD8176 is useful in many high speed video
applications.
The independent output buffers of the AD8176 can be placed
into a high impedance state to create larger arrays by paralleling
crosspoint outputs. Inputs can be paralleled as well. The
AD8176 offers both serial and a parallel programming modes.
The AD176 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
The AD8176 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.
Rev. PrA
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