CG5 Clock Generator

CG5 Clock Generator

by ER&D
$ 284.99



Key Features:

  • Broad Frequency Range
  • Duty Cycle Adjustment
  • Phase Offset Adjustment
  • External Reference Input for Frequency Correction
  • USB-Powered
  • GUI-Controlled

Common Applications:

  • Troubleshooting
  • Educational Lab Experimentation
  • Engineering Lab Experimentation

Functional Description:

The CG5 is a versatile, multi-channel signal source, which can provide five independent 3.3V, CMOS-compatible square wave output signals over the frequency range of 0.01 Hz to 128 MHz.  Each output is uniquely settable for frequency, duty cycle and phase offset values.  The on-board TCXO has an output frequency of 6.25 MHz, which is multiplied by 16 to obtain a 100 MHz time base, allowing the CG5 to offer a 10 ns resolution for phase and duty cycle adjustments.  

The CG5 draws its power from a computer USB port, which is then regulated to 3.3 V using a low-noise voltage regulator.  While providing a stable, low-noise voltage source for the CG5, the voltage regulator also incorporates internal current limiting (150 mA) and thermal protection circuitry, permitting indefinite, damage-free operation into short-circuit conditions.  The CG5 comes equipped with a PTC resettable thermal fuse for an additional layer of protection from accidental short-circuiting.  Since the CG5 consumes less than 50 mA of current, screw terminals are provided to allow the user to access the reserve 100 mA of current from the 3.3V regulated supply to power external applications.

The CG5 is designed to accept a 10 MHz reference signal from a frequency standard or other precision source.  This 50-ohm input requires a +7.0 dBm minimum power level.  This reference is used to software-correct the set frequency to compensate for error between the on-board oscillator and the external reference.  Frequency corrections are calculated and implemented whenever a change to any CG5 parameter is made.


    Absolute Maximum Ratings1

    (At room ambient conditions unless specified otherwise)

    Recommended Operating Conditions*

    (At room ambient conditions unless specified otherwise)



    1.  Stresses beyond those listed under Absolute Maximum Ratings in the table above may cause permanent damage to the device.  The ratings listed are for stress evaluation purposes, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied.  Additionally, the exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
    2. The CG5 is designed to derive its power from the computer’s USB port, which can supply
      approximately 500 mA at 5.0 VDC.  Therefore, when operated in this manner, the CG5 will
      never be subjected to voltage stresses which could induce failure.
    3. The maximum error will occur at a set frequency of 1525.8673Hz.  The error at other frequencies will be less.
    4. This maximum error only occurs at non-50% duty cycles, resulting in a condition where some set frequencies cannot be generated.
    5.  Duty adjustment is only allowed at frequencies below 4.0 MHz.  At frequencies of 4.0 MHz and above the duty cycle will be set to 50%.

    Outline Drawing:

    (All dimensions are in inches with a tolerance of ± 0.020").


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    Esterline Research and Design

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    Ph: 717-348-5326