Piezo Driver / Amplifier And Modulator A-303
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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 up to ±95V (190V ptp) at ±2.5A at frequencies from DC to 250 kHz.
The A-310 amplifier is available in 2 configurations:
1. Single amplifier +/-95V output, +/-2.5A output current,DC- 250KHz. Frequency Bandwidth.
2. Dual amplifier - 2 independent amplifiers with independent inputs and outputs., +/-95V
outputs, +/-1.25A output current capability, DC-250 KHz. Frequency bandwidth.
By connecting 2 amplifiers in inverting, differential connection to a floating load, up to +/-190V @ +/-1.25A 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 High frequency amplifier -
DC-250KHz .AM modulation

1 Very Low Electrical Noise-

1 Low Distortion
<0.01% @ (DC-1KHz)

1 High Slew rate-
150 Volts/microsecond.

Output Vs. Input @ 1KHz. Sine wave

FM modulation




Output Vs. Input @ 250KHz. Sine wave


A-310 High Power Piezo Amplifier

Amplifier section:
Maximum Input Voltage
± 12 V
Maximum Output Voltage
± 95 V (190Vptp)
Maximum Current
± 2.5A (+/-1.25A in dual amp configuration)

Into 1 K2 resistive load
DC to 250 kHz (-3 dB)
Into Capacitive load (single amp):
DC to 250 kHz (- 3 dB) (0 to 20nF)
DC to 75 kHz (- 3 dB) ( 50 nF)
DC to 38 kHz (- 3 dB) (0.1 µF)
DC to 3500 Hz (-3 dB) (1 µF)
DC to 350Hz (-3 dB) (10 µF)
Output Power
~250 Watt Peak
DC Gain
10 (up to 50 optional)
Input & Output: Direct DC Coupling
DC Offset
Adjustable to ± 90 Volts (RTO)+ On/Off Switch
Input Impedance
10 K2
Slew Rate
150V/ µSec
Output Impedance
1 2
Output Noise (input shorted, 250 KHz. Bandwidth)
6 mV PTP max. (1.3 mV 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

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

Line Input Current
6 A 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 Up to 50
04-Variable Gain 0-10X or 0 - 20X - No Charge.

The Standard amplifier has very low noise.

Noise level @ 250 KHz. BW, input shorted


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

Total noise is less than 1mV RMS !

Typical Noise2


Output Noise - 250 KHz. Bandwidth

5MHz B.W. Limit

he amplifier/s are housed in a standard 19" rack enclosure, 4U height.
Weight: 24 Kg.

Download Datasheet Download PDF file


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 = 800V ptp).

Series Connection

Calulating the estimated current needed to drive your load:

In order to purchase the right amplifier to drive your load, you must calulate the peak current needed.
For Capacitive load:
Click Here
for current

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.
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.

Frequency Response curve for various output configurations and loads:

2 Bi-Polar amplifiers, +/-95V @ 1.25A:

A310 Bipolar 95V 1.25A
1 Bi-Polar amplifiers, +/-95V @ 2.5A:

A310 Bipolar 95V 2.5A
A-310 safe operating limits:

SOA graph

This amplifier is NOT SUITABLE for driving pure inductive loads
(i.e. speakers, solenoides, electromagnets etc.)
Internal power dissipation: 100W dc.

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.

The active impedance of a capacitive load is given by the equation:
Z=1/(2*Pi*F*C) where Pi=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).
Output Voltage is +/-100V, Maximum Frequency=20KHz. Load is 100nF.
Z=1/(2*3.1415*20,000*100EE-9) =79.6 Ohms.
100[V]/80[Ohm] =1250[mA] ===>The single channel amplifier will drive that load at an amplitude of 100V (200V ptp). For the dual channel amplifier, this load is marginal because the current capacity is only 1200mA.

Fast shipping!!!
The A-310 amplifiers are available from stock. We ship within 7-10 working days after your credit card was approved. Shipping is by UPS. It takes up to 3 working days to ship by UPS to any country.

We accept VISA, MaterCard, American Express. Your credit card is charged only after we ship the order.

For more information about our Amplifiers and Signal Conditioner products , please click here.

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A.A. Lab-Systems
Head Office: 33 Hayetzira St., Ramat-Gan 52521, ISRAEL.Tel: 972-3-5756327, Fax: 972-3-5756326
USA office: 9 Blossom drive, Kennett Square, PA19348.  Tel: (302)478-2881 Fax: (610)444-5544

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