High Voltage Amplifiers


Model 5/80 High-Voltage Power Amplifier

 

The Trek Model 5/80 is a DC-stable, high-voltage power amplifier designed to provide precise control of output voltages in the range of 0 to ±5 kV DC or peak AC with an output current range of 0 to ±80 mA DC or peak AC. It is configured as a noninverting amplifier with a fixed gain of 1000 V/V. Industrial and research applications include dielectric material characterization, polymer and ceramic corona charging, and piezoelectric driving and control.

The Model 5/80 features an all solid-state design for high slew rate, wide bandwidth, and low-noise operation. The four-quadrant, active output stage sinks or sources current into reactive or resistive loads throughout the output voltage range. This is essential for achieving the accurate output response and high slew rates demanded by reactive loads.

The Model 5/80 is protected against overvoltage and overcurrent conditions that may be generated by active loads or by output short circuits to ground. Precision voltage and current monitors provide low-voltage representations of the high-voltage output and load current for monitoring purposes or for use as feedback signals in a closed-loop system.

The Remote High-Voltage On/Off feature provides a connection for a remote device to turn on and off the High-Voltage of the instrument. This makes the Model 5/80 suitable for automated or computer controlled systems. The Model 5/80 can be operated on a bench top or in a standard 19-inch rack.

 

 

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AMPLIFIER INPUT

  • Input Voltage Range
    0 to ±5 V DC or peak AC.
    Input Impedance
    10 kohm, nominal.

OUTPUT

  • Output Voltage Range
    0 to ±5 kV DC or peak AC.
  • Output Current Range
    0 to ±80 mA DC or peak AC.
    (See Automatic Power Limit feature for limitations.)

PERFORMANCE

  • DC Voltage Gain
    1000 V/V.
  • DC Voltage Gain Accuracy
    Better than 0.1% of full scale.
  • Offset Voltage
    Less than ±2 V.
  • Output Noise
    Less than 1.0 V rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
  • Slew Rate (10% to 90%, typical)
    Greater than 1000 V/µs.
  • Large Signal Bandwidth (-3dB)
    DC to greater than 60 kHz.
  • Large Signal Bandwidth (1% distortion)
    DC to greater than 50 kHz.
  • Small Signal Bandwidth (-3dB)
    DC to greater than 75 kHz.
  • Settling Time (to 1%)
    Less than 20 µs for a 5 kV step.
  • Stability
    • Drift with Time
      Less than 50 ppm/hr, noncumulative.
    • Drift with Temperature
      Less than 200 ppm/°C.
  • Automatic Power Limit
    Automatically limits the output power to protect the Model 5/80 from overheating due to excessive internal power dissipation. The following graph illustrates the Model 5/80 operating range automatic power limits.

PRODUCT FEATURES

  • High-Voltage On/Off
    Switch selectable for either local or remote control.
    • Local
      Individual push-button switches.
    • Remote
      A TTL compatible input. A TTL high (or open) turns off the high-voltage output. A TTL low turns on the high-voltage output.
  • Dynamics Adjust
    A graduated one-turn panel potentiometer used to optimize the AC response of the Model 5/80 under various load conditions.
  • Current Limit/Trip
    Switch selectable for either limit or trip. A graduated one-turn panel potentiometer is used to adjust the limit or trip level from 0 to 80 mA.
  • Out of Regulation Status
    A yellow indicator will illuminate and a BNC will provide a TTL low when the Model 5/80 fails to produce the required high-voltage output such as during current limit or short circuit load conditions.
  • Trip Status
    An indicator will illuminate and a BNC will provide a TTL low when the high-voltage output is disabled due to:
    a) the output current exceeding the current trip level,
    b) the detection of a high-voltage power supply fault, or
    c) the removal of the top cover.
  • Fault Status
    A BNC will provide a TTL low when the Model 5/80 is out of regulation for greater than 500 ms.
  • Voltage Monitor
    A buffered output providing a low-voltage replica of the high voltage output.
    • Scale
      1/1000th of the high-voltage output signal.
    • DC Accuracy
      Better than 0.1% of full scale.
    • Offset Voltage
      Less than ±2 mV.
    • Output Noise
      Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Output Impedance
      47 ohms.
  • Current Monitor
    A buffered output providing a low-voltage representation of the load current.
  • Scale
    0.1 V/mA.
  • DC Accuracy
    Better than 1% of full scale.
  • Offset Voltage
    Less than ±10 mV.
  • Output Noise
    Less than 30 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
  • Bandwidth (-3db)
    DC to greater than 10 kHz.
  • Output Impedance
    47 ohms.

ACCESSORIES

  • Accessories Supplied
  • Operator’s manual, Alden 3 meter (10 ft) high-voltage output cable assembly (#43406), and line cord.

PRODUCT FEATURES

  • High-Voltage On/Off
    Switch selectable for either local or remote control.
    • Local
      Individual push-button switches.
    • Remote
      A TTL compatible input. A TTL high (or open) turns off the high-voltage output. A TTL low turns on the high-voltage output.
  • Dynamics Adjust
    A graduated one-turn panel potentiometer used to optimize the AC response of the Model 5/80 under various load conditions.
  • Current Limit/Trip
    Switch selectable for either limit or trip. A graduated one-turn panel potentiometer is used to adjust the limit or trip level from 0 to 80 mA.
  • Out of Regulation Status
    A yellow indicator will illuminate and a BNC will provide a TTL low when the Model 5/80 fails to produce the required high-voltage output such as during current limit or short circuit load conditions.
  • Trip Status
    An indicator will illuminate and a BNC will provide a TTL low when the high-voltage output is disabled due to:
    a) the output current exceeding the current trip level,
    b) the detection of a high-voltage power supply fault, or
    c) the removal of the top cover.
  • Fault Status
    A BNC will provide a TTL low when the Model 5/80 is out of regulation for greater than 500 ms.
  • Voltage Monitor
    A buffered output providing a low-voltage replica of the high voltage output.
    • Scale
      1/1000th of the high-voltage output signal.
    • DC Accuracy
      Better than 0.1% of full scale.
    • Offset Voltage
      Less than ±2 mV.
    • Output Noise
      Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Output Impedance
      47 ohms.
  • Current Monitor
    A buffered output providing a low-voltage representation of the load current.
    • Scale
      0.1 V/mA.
    • DC Accuracy
      Better than 1% of full scale.
    • Offset Voltage
      Less than ±10 mV.
    • Output Noise
      Less than 30 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Bandwidth (-3db)
      DC to greater than 10 kHz.
    • Output Impedance
      47 ohms.

CERTIFICATION

TREK, INC. certifies that each Model 5/80 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory.

Low-Voltage Safety Compliance (EN 61010-1)
Installation Category
CAT II: Local level mains, appliances, portable equipment.
Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.

All specifications are with no load unless otherwise noted.
All specifications are subject to change.

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