AD8176_15 Datasheet, PDF (1/40 Pages) Analog Devices – Video Crosspoint Switch

FEATURES
Large, triple 16 × 9 high speed, non-blocking switch array
Pin compatible with AD8175 (16 × 9 switch array) and
AD8177, AD8178 (16 × 5 switch arrays)
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
Bandwidth: 450 MHz
Slew rate: 1650 V/μs
Settling time: 4 ns to 1% to support 1600 × 1200 @ 85 Hz
Low power of 3.5 W
Low all hostile crosstalk
−82 dB @ 5 MHz
−47 dB @ 500 MHz
Wide input common-mode range of 4 V
Reset pin allows disabling of all outputs
Fully populated 26 × 26 ball PBGA package
(27 mm × 27 mm, 1 mm ball pitch)
Convenient grouping of RGB signals for easy routing
APPLICATIONS
RGB video switching
KVM
Professional video
GENERAL DESCRIPTION
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 450 MHz bandwidth and a slew rate
of 1650 V/μs. With −82 dB of crosstalk and −90 dB isolation
(@ 5 MHz), the AD8176 is useful in many high speed video
applications.
The AD8176 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
Rev. 0
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450 MHz, Triple 16 × 9
Video Crosspoint Switch
AD8176
FUNCTIONAL BLOCK DIAGRAM
D0 D1 D2 D3 D4 VPOS VNEG VDD DGND
AD8176
SERIN
SER/PAR
WE
CLK
CS
UPDATE
RST
CMENC
45-BIT SHIFT
1
REGISTER WITH
5-BIT PARALLEL
0
LOADING
45
PARALLEL LATCH
45
A0
A1
A2
A3
SEROUT
DECODE
9
9 × 5:16 DECODERS
INPUT
RECEIVER
G = +2
144 _OUTPUT
BUFFER
G = +1
2
R
2
G
2
B
SWITCH
MATRIX
G = +2
2
R
2
G
2
B
H
V
2
R
G
2
B
2
2
R
2
G
2
B
H
V
VBLK
VOCM_CMENCON
VOCM_CMENCOFF
Figure 1. AD8176
CM and black level 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 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 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.
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