1GHz Triple Multiplexing Amplifiers Evaluation Board


The ISL59445IRZ-EVAL evaluation board contains all the circuitry needed to characterize critical performance parameters of the ISL59445. The ISL59445 is a 1GHz bandwidth multiplexing amplifier designed primarily for video input switching.

The evaluation board circuit and layout is optimized for either 50? or 75? terminations, and implements a basic RG-B video 2 input MUX amp. The board is supplied with 75? input signal terminations and a 75? back-termination resistor on each of the 3 outputs, making it suitable for driving video cable. The user has the option of replacing the 75? resistors with 50? resistors for other applications. The control lines contain 50? resistors to match the 50? output impedance of high speed pulse generators. Control line termination resistors are recommended for rise and fall times under 10ns to minimize unwanted transients. If DC is used for the control logic, the resistors may be removed; or the applied DC voltage can be reduced to 2.5V to reduce the dissipation in the termination resistor.

Key Features

  • Triple 4:1 Multiplexers for RGB
  • Internally Set Gain-of-1
  • High Speed Three-state Outputs (HIZ)
  • Power-down Mode (EN)
  • ±5V Operation
  • ±1200 V/?sec Slew Rate
  • 1GHz Bandwidth
  • Options to include an output series resistor (RS) followed by a parallel resistor (RL) capacitor (CL) network to ground
  • Board is supplied with the 75? back termination resistors


  • HDTV/DTV analog inputs
  • Video projectors
  • Computer monitors
  • Set-top boxes
  • Security video
  • Broadcast video equipment

ISL59445IRZ-EVAL MUX Amp Eval Board

ISL59445IRZ-EVAL MUX Amp Eval Board

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