16 × 16 Crosspoint Switches
Data Sheet
Rev. C Document Feedback
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FEATURES
16 × 16 high speed nonblocking switch arrays
AD8114; G = 1
AD8115; G = 2
Serial or parallel programming of switch array
Serial data out allows daisy-chaining of multiple
16 × 16 arrays to create larger switch arrays
High impedance output disable allows connection of
multiple devices without loading the output bus
For smaller arrays see the AD8108/AD8109 (8 × 8) or
AD8110/AD8111 (16 × 8) switch arrays
Complete solution
Buffered inputs
Programmable high impedance outputs
16 output amplifiers, AD8114 (G = 1), AD8115 (G = 2)
Drives 150 Ω loads
Excellent video performance
25 MHz, 0.1 dB gain flatness
0.05%/0.05° differential gain/differential phase error
(R
L
= 150 Ω)
Excellent ac performance
−3 dB bandwidth: 225 MHz
Slew rate: 375 V/µs
Low power of 700 mW (2.75 mW per point)
Low all hostile crosstalk of −70 dB at 5 MHz
Reset pin allows disabling of all outputs (connected through
a capacitor to ground provides power-on reset capability)
100-lead LQFP (14 mm × 14 mm)
APPLICATIONS
Routing of high speed signals, including
Video (NTSC, PAL, S, SECAM, YUV, RGB)
Compressed video (MPEG, wavelet)
3-level digital video (HDB3)
Data communications
Telecommunications
GENERAL DESCRIPTION
The AD8114/AD8115 are high speed, 16 × 16 video crosspoint
switch matrices. They offer a −3 dB signal bandwidth greater than
200 MHz and channel switch times of less than 50 ns with 1%
settling. With −70 dB of crosstalk and −98 dB isolation (at 5 MHz),
the AD8114/AD8115 are useful in many high speed applications.
FUNCTIONAL BLOCK DIAGRAM
AD8114/AD8115
OUTPUT
BUFFER
G = +1,
G = +2
80
80
256
80-BIT SHIFT REGISTER
WITH 5-BIT
PARALLEL LOADING
PARALLEL LATCH
DECODE
16 × 5:16 DECODERS
16
CLK
DATA IN
UPDATE
CE
RESET
16 INPUTS
A0
DATA
OUT
16
OUTPUTS
SET
INDIVIDUAL
OR RESET
ALL OUTPUTS
TO "OFF"
A1
A2
SER/PAR
D0
D1
D2 D3
D4
ENABLE/DISABLE
A3
SWITCH
MATRIX
01070-001
Figure 1.
The differential gain and differential phase of better than 0.05%
and 0.05°, respectively, along with a 0.1 dB flatness out to 25 MHz
while driving a 75 Ω back-terminated load, make the AD8114/
AD8115 ideal for all types of signal switching.
The AD8114/AD8115 include 16 independent output buffers
that can be placed into a high impedance state for paralleling
crosspoint outputs so that off channels do not load the output bus.
The AD8114 has a gain of 1, while the AD8115 offers a gain of 2.
They operate on voltage supplies of ±5 V while consuming only
70 mA of idle current. The channel switching is performed via a
serial digital control (which can accommodate daisy-chaining of
several devices) or via a parallel control, allowing updating of an
individual output without reprogramming the entire array.
The AD8114/AD8115 is packaged in a 100-lead LQFP and is
available over the extended industrial temperature range of
−40°C to +85°C.
