High Voltage / Piezo Amplifier

A-310 High Voltage, High Power Amplifier/ Piezo Driver:

The A - 310 Piezo Driver / Piezo Amplifier is a High Voltage, Fast Piezo Driver / Linear Amplifier for High Power Applications. It was especially designed as a Linear Amplifier / Driver for High Capacitance PIEZO Electric Actuators (also known as “Piezo Amplifier”), Stacks, Piezo Sheets, Bimorph Elements and other devices. The Piezo Driver / Piezo Amplifier is based on a High Voltage, High Frequency and High Current MOSFET Amplifier which is capable of driving upto ±100V (200Vptp) at ±2.5A at frequencies from DC to 250kHz.

  1. The A - 310 Amplifier is available in 2 Configurations:
  2. Single Amplifier: ±100V Output, ±2.5A Output Current, DC 250KHz Frequency Bandwidth.
  3. Dual Amplifier: 2 Independent Amplifiers with Independent Inputs and Outputs, ±100V Outputs, ±1.2A Output Current capability, DC 250 KHz Frequency Bandwidth.

By connecting 2 Amplifiers in Inverting, Differential connection to a Floating Load, upto ±200V @ ±1.2A can be delivered to the load (240W peak or 120W RMS). The Amplifier Section is Very Stable and has a Very Low Electrical Noise - Compare Our Specifications!

This High Speed Amplifier / Driver can be used for various applications requesting High Frequency, High Voltage and Fast Response as: Plasma Driver and Plasma Actuation, Driver for Piezo Manipulator, Optical Switching Devices, Closed Loop Feedback Systems, Vibration Control, Structural Damping Analysis, Flow Actuation and Control etc.

  1. Features:
  2. High Frequency Amplifier: DC 250kHz
  3. Very Low Electrical Noise: <5mVptp
  • Low Distortion: <0.01% @ (DC - 1kHz)
  • High Slew Rate: 150V/µSec

  • Output Vs Input @ 1kHz Sine Wave

    Output Vs Input @ 250kHz Sine Wave

    1. Specifications:

    Amplifier Section

    Maximum Input Voltage:


    Maximum Output Voltage:

    ±100V (200Vptp)

    Maximum Current:

    ±2.5A (±1.2A in Dual Amp Configuration)


    Into 1KΩ Resistive Load
    DC to 250kHz (-3dB)
    Into Capacitive Load (Single Amp):
    DC to 250kHz (-3dB) (0 to 20nF)
    DC to 75kHz   (-3dB) (50nF)
    DC to 38kHz   (-3dB) (0.1µF)
    DC to 3500Hz (-3dB) (1µF)
    DC to 350Hz   (-3dB) (10µF)

    Output Power:

    250 Watt Peak

    DC Gain:

    10 (upto 50 optional)


    Input & Output: Direct DC Coupling

    DC Offset:

    Adjustable to ±90V (RTO) + On/Off Switch

    Input Impedance:


    Slew Rate:


    Output Impedance:


    Output Noise (Input Shorted, 250KHz Bandwidth):

    6mV PTP max. (1.3mV RMS max.)

    Variable Gain Option:

    0 - 10X or 0 - 20X or 0 - 40X available
    Please consult the factory regarding that option

    AC Input

    Line Input Voltage:

    110/120V, 60Hz or 220/230V, 50/60Hz.
    Preset on factory

    Line Input Current:

    6A peak (@220VAC)


    01 - One channel, ±100V @ ±2.5A:

    1 Input, 1 Output

    02 - Dual Channel, ±100V @ ±1.2A X2:

    2 Inputs, 2 Outputs

    02 - Higher Gain:

    Upto 50

    04 - Variable Gain:

    0 - 10X or 0 - 20X

    The Standard Amplifier has Very Low Noise.

    Noise Level @ 250kHz BW, Input Shorted

    Display set @ 5mV/div. 100nS/div.

    Total Noise is less than 1mV RMS!

    Output Noise: 250kHz Bandwidth 5MHz B.W. Limit

    The Amplifier’s are Housed in a Standard 19″ Rack Enclosure, 4U Height, Weight: 24Kg.

    1. Applications:
    2. 2 Amplifiers can be connected in Series or in Parallel in order to Double the Output Voltage or Output Current. Series Connection (±400V into a Floating Load = 800Vptp).

    Calculating the estimated current needed to drive your load:
    In order to purchase the right amplifier to drive your load, you must calculate the peak current needed.

    For Capacitive Load:
              Ipeak(A) = 2 π F C Vpeak (for a Sine Wave)
              Ipeak(A) = 4 F C Vpeak (for a triangular wave)
              Ipeak(A) = C dV / dt (for a square wave or sharp rise time)

              F = Maximum frequency (Hz.)
              C = Capacitance in Farads
              Vpeak = Maximum Voltage you need to drive your Load.
              Π = 3.1415927

    For Resistive Load:
              I = Vpeak / R

              Where R is the resistance of your load in ohms

              The Current, Voltage and Frequency must be less or equal to the amplifier’s specifications

    This Amplifier is NOT SUITABLE for driving pure Inductive Loads
    (i.e. speakers, solenoides, electromagnets etc.)

    You must connect your load with thick wires to minimize inductance (like speaker wires). Coaxial cable is not recommended for cables over 2m (6.5 Ft.) because the capacitance of the cable (15 - 50 pF/Ft) will load your amplifier at high frequencies.

    1. Frequency Response Curve for Various Output Configurations and Loads:
      1. 2 Bi-Polar Amplifiers, ±95V @ 1.25A:
      2. 1 Bi-Polar Amplifiers, ±95V @ 2.5A:
      3. A - 310 Safe Operating Limits:


    The active impedance of a capacitive load is given by the equation: Z = 1 / (2 * π * F * C)
    Where π = 3.1415, C in Farads, F in Hz.
    The user must check that under the peak operation voltage, at maximum frequency, the current will not exceed 2500mA (2.5A)


    Operating Voltage is ±100V, Maximum Frequency = 20kHz, Load is 100nF
    Z = 1 / (2 * 3.1415 * 20,000 * 100-9) = 79.6Ω (Ohms)
    100[V] / 80[Ω] = 1250[mA]
    The Single Channel Amplifier will drive that load at an Amplitude of 100V (200Vptp). For the Dual Channel Amplifier, this Load is marginal because the Current capacity is only 1200mA.

    All Specifications are subject to change without a Prior Notice

    For any sort of clarifications kindly contact: