AD8114 Datasheet, PDF (1/26 Pages) Analog Devices – Low Cost 225 MHz 16 X 16 Crosspoint Switches

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Low Cost 225 MHz
16 ؋ 16 Crosspoint Switches
AD8114/AD8115*
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 ؋ 16s to Create Larger Switch Arrays
High Impedance Output Disable Allows Connection of
Multiple Devices Without Loading the Output Bus
For Smaller Arrays See Our 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 ⍀ Loads
Excellent Video Performance
25 MHz, 0.1 dB Gain Flatness
0.05%/0.05؇ Differential Gain/Differential Phase Error
(R_L = 150 ⍀)
Excellent AC Performance
–3 dB Bandwidth: 225 MHz
Slew Rate: 375 V/␮s
Low Power of 700 mW (2.75 mW per Point)
Low All Hostile Crosstalk of –70 dB @ 5 MHz
Reset Pin Allows Disabling of All Outputs (Connected
Through a Capacitor to Ground Provides “Power-On”
Reset Capability)
100-Lead LQFP Package (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)
Datacomms
Telecomms
PRODUCT 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 –90 dB isolation (@
5 MHz), the AD8114/AD8115 are useful in many high speed
applications. The differential gain and differential phase of
better than 0.05% and 0.05° respectively, along with 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.
*Patent Pending.
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
80
PARALLEL LATCH
80
DECODE
16
16 ؋ 5:16 DECODERS
AD8114/AD8115
256
OUTPUT
BUFFER
G = +1,
G = +2
A0
A1
A2
A3
DATA
OUT
16 INPUTS
SWITCH
MATRIX
16
OUTPUTS
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 accommo-
date “daisy chaining” of several devices) or via a parallel control
allowing updating of an individual output without reprogram-
ming the entire array.
The AD8114/AD8115 is packaged in 100-lead LQFP package
and is available over the extended industrial temperature range
of –40°C to +85°C.
REV. 0
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© Analog Devices, Inc., 1998