The A - 304 Piezo Driver / Piezo Amplifier is a High Voltage, High Speed Piezo Driver / Linear Amplifier combined with a Wideband AM/FM Modulator. It was especially designed as a Linear Amplifier / Driver for PIEZO Electric Actuators (also known as “Piezo Amplifier”), Stacks, Piezo Sheets, Bimorph elements and other devices. It may be also used as a general purpose High Voltage Amplifier for Medical Applications (e.g., as Electrode Driver for Neurology).

The Piezo Driver / Piezo Amplifier is based on a High Voltage, High Frequency and High Current MOSFET Amplifier which is capable of driving upto ±400V (800Vptp) at ±100mA at Frequencies from DC to 250kHz.

By connecting 2 Amplifiers in Parallel or in Series, the Output Voltage and Current may be doubled to 1600Vptp @ 100mA or 800Vptp @ 200mA. The Amplifier Section is Very Stable and has a Low Noise Output and a Very Low Electrical Noise - Compare Our Specifications!

A - 304 High Voltage Amplifier and Modulator

The built-in modulator (AM or FM) enables the user to modulate the carrier frequency (adjusted on the front panel) by any input signal at the range of ±10V. This modulator can be bypassed by a switch.

This High Slew Rate Amplifier / Driver can be used for various applications requesting High Slew Rate, 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.

Features:
Very Low Electrical Noise
Low Distortion
No Audible Noise: You may hear your experiment
High Slew Rate: upto 300V/µSec
Input Protection: High Voltage, On/Off
Output Protection: Short-circuit, Power Loss, Impedance
Built in Modulator:

Amplitude(AM) or Frequency(FM) Modulation
High Frequency: upto 100kHz
Low Distortion
Adjustable Frequency, Gain, Offset
The Modulator may be turned off if not in use (only amplifier section would work)

Block Diagram

Specifications:

Sync Output provides a Square Wave in the same Phase and Frequency of the Modulator Output (for synchronization and frequency measurement)
The unit is self-cooled - no fan or noisy parts
Amplifier Section
Maximum Input Voltage:	±12V
Maximum Output Voltage:	±400V (800Vptp)
Maximum Current:	±100mA
Bandwidth:	Into 1KΩ Resistive Load: DC to 300kHz (-3dB) Into Capacitive Load: DC to 120kHz (-3dB) (1nF) DC to 12kHz (-3dB) (10nF) DC to 1kHz (-3dB) (0.1µF) DC to 100Hz (-3dB) (1µF) DC to 10Hz (-3dB) (10µF)
Output Power:	40 Watt Max.
DC Gain:	40 (upto 100 optional)
Coupling:	Input & Output: Direct DC Coupling
DC Offset:	Adjustable to ±320V + DC On/Off
Input Impedance:	10KΩ
Slew Rate:	300V/µSec
Output Impedance:	100Ω
Output Noise: (input shorted, 300kHz Bandwidth)	10mV PTP max. (2mV RMS max.)
Variable Gain Option:	0 - 40X or 0 - 100X available Consult the factory regarding that option
Modulator Section
Center Frequency:	1 - 100kHz adjustable
Modulation:	Amplitude (AM) or Frequency (FM)
Waveform:	Sine Wave
Distortion:	0.5% Max.
Modulation Input F.S.:	±10V
Modulation Input Impedance:	10KΩ
Sync Output:	1Vptp, AC Coupled, 1KΩ Impedance
Amplitude Adjustment:	0.5Vptp to 20Vptp
Offset Adjustment:	±5V or 0V Fixed
Modulator output Impedance:	100Ω
	The Modulator may be turned off when not in use!
AC Input
Line Input Voltage:	110/120V, 60Hz or 220/230V, 50Hz
Line Input Current:	1.3 A peak

Applications:

2 Amplifiers can be connected in Series or in Parallel in order to double the Output Voltage or Output Current. Series Connection (±800V into a floating load = 1600V ptp).

Please note that both amplifiers must be floating (i.e. be careful not to ground them via an oscilloscope etc.) It is also possible to double or triple the output voltage by using a special transformer. Using a transformer is possible only at high frequency (over 10kHz) and it requires more components to be added for balancing and proper termination of the load. Parallel connection is done by adding resistors at the input and at the output. Please consult the factory for parallel connection.

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:
          I_peak(A) = 2 π F C V_peak (for a Sine Wave)
          I_peak(A) = 4 F C V_peak (for a triangular wave)
          I_peak(A) = C dV / dt (for a square wave or sharp rise time)

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

For Resistive Load:
          I = V_peak / 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.

Example:
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 200mA (0.2A)
Example:
Operating Voltage is ±150V, Maximum Frequency = 10kHz, Load is 10nF Z = 1 / (2 * 3.1415 * 10,000 * 10 * 10^-9) = 1592Ω (Ohms) 150[V] / 1592[Ω] = 94[mA] The amplifier will drive that load at an amplitude of 150V (300Vptp)

Frequency Response Curve for Various Loads:

All Specifications are subject to change without a Prior Notice

For any sort of clarifications kindly contact:
info@globesolutionz.com