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AD8115:  Low Cost 225 MHz 16 x 16 Crosspoint Switch, G=+2

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The AD8114/AD81151 are high speed 16 x 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.

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 100-lead LQFP package and is available over the extended industrial temperature range of –40°C to +85°C.

An evaluation board is available for this product and may be ordered using the following product number: AD8114-EVAL and AD8115-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.

1Patent pending.


  • 16 x 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 x 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 x 8) or AD8110/AD8111 (16 x 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 (RL = 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 @ 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 x 14 mm)

Functional Block Diagram for AD8115


Наименование Тип контента Тип файлов
AD8114/AD8115: Low Cost 225 MHz 16 x 16 Crosspoint Switches Data Sheet  (Rev B, 09/2005) (pdf, 1906 kB) Технические описания PDF
Data-acquisition system uses fault protection
By Catherine Redmond, Analog Devices, Inc. (EDN, 4/15/2004)
Технические статьи HTML
CMOS Switches Offer High Performance in Low Power, Wideband Applications  (pdf, 320 kB)
by Theresa Corrigan and Ray Goggin, Analog Devices, Inc. (High Frequency Electronics, February 2004)
Технические статьи PDF
Enhanced Multiplexing for MEMS Optical Cross Connects
by James Caffrey (Fiberoptic Product News, 8/2003)
Технические статьи HTML
High Speed Switches  (pdf, 63 kB) Product Selection Guide PDF
Video Amplifier Products (April 2007)  (pdf, 4117 kB) Обзор PDF
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

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