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AD8112 fiches techniques PDF

Analog Devices - fully buffered crosspoint switch matrix that operates

Numéro de référence AD8112
Description fully buffered crosspoint switch matrix that operates
Fabricant Analog Devices 
Logo Analog Devices 





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AD8112 fiche technique
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FEATURES
Low cost, 16 × 8, high speed, nonblocking switch array
Pin-compatible 16 × 16 version available (AD8113)
Serial or parallel programming of switch array
Serial data out allows daisy chaining control of multiple
16 × 8 arrays to create larger switch arrays
Output disable allows connection of multiple devices
without loading the output bus
Complete solution
Buffered inputs
8 output amplifiers
Operates on ±5 V or ±12 V supplies
Low supply current of 54 mA
Excellent audio performance VS = ±12 V
±10 V output swing
0.002% THD at 20 kHz maximum 20 V p-p (RL = 600 Ω)
Excellent video performance VS = ±5 V
0.1 dB gain flatness of 10 MHz
0.1% differential gain error (RL = 1 kΩ)
0.1° differential phase error (RL = 1 kΩ)
Excellent ac performance
−3 dB bandwidth 60 MHz
Low all-hostile crosstalk of −83 dB at 20 kHz
Reset pin allows disabling of all outputs (connected to a
capacitor to ground provides power-on reset capability)
100-lead LQFP (14 mm × 14 mm)
APPLICATIONS
CCTV surveillance/DVR
Analog/digital audio routers
Video routers (NTSC, PAL, S-Video, SECAM)
Multimedia systems
Video conferencing
GENERAL DESCRIPTION
The AD8112 is a low cost, fully buffered crosspoint switch matrix
that operates on ±12 V for audio applications and ±5 V for
video applications. It offers a −3 dB signal bandwidth greater
than 60 MHz and channel switch times of less than 60 ns with
0.1% settling for use in both analog and digital audio. The
AD8112 operated at 20 kHz has a crosstalk performance of
−83 dB and isolation of 90 dB. In addition, ground/power pins
surround all inputs and outputs to provide extra shielding for
operation in the most demanding audio routing applications.
With a differential gain and differential phase better than 0.1%
and 0.1°, respectively, and a 0.1 dB flatness output of up to 10 MHz,
the AD8112 is suitable for many video applications.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
Audio/Video, 60 MHz, 16 × 8,
Gain of +2 Crosspoint Switch
AD8112
FUNCTIONAL BLOCK DIAGRAM
SER/PAR D0 D1 D2 D3 D4
CLK
DATA IN
UPDATE
CE
RESET
80-BIT SHIFT REGISTER
WITH 5-BIT
PARALLEL LOADING
40 40
PARALLEL LATCH
40
DECODE
8 × 5:16 DECODERS
NO
CONNECT
8
AD8112
OUTPUT
128 BUFFER
G = +2
A0
A1
A2
DATA
OUT
SWITCH
MATRIX
Figure 1.
The AD8112 includes eight independent output buffers that can
be placed into a disabled state for paralleling crosspoint outputs
so that off channel loading is minimized. The AD8112 has a gain
of +2. It operates on voltage supplies of ±5 V or ±12 V while
consuming only 34 mA or 31 mA of current, respectively. The
channel switching is performed via a serial digital control (which
can accommodate the daisy chaining of several devices) or via
a parallel control, allowing updating of an individual output
without reprogramming the entire array.
The AD8112 is packaged in a 100-lead LQFP and is available
over the commercial temperature range of 0°C to 70°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.

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