Micromechatronics, Inc. (MMech)

www.mmech.com - Ph: 814-861-5688

PDUS210 - 210 Watt Ultrasonic Driver

Piezoelectric Drivers

PDUS210 V5 lg

pdf-icon_sm PDUS210 Manual-V5

pdf-icon_sm Introduction to Ultrasonic Drivers

Download Desktop Software, Version: 500014

Download Firmware, Version: 500021

Download 3D Model

Download External Transformer 3D Model


The PDUS210 is a complete solution for driving and analysing ultrasonic actuators up to 210 Watts. Functions include high-speed resonance tracking of both series and parallel resonance modes, vibration amplitude control, pulsed excitation, frequency modulation, and analysis functions such as impedance and frequency response measurement. The PDUS210 is well suited to both OEM product integration and laboratory use for research and development. Applications include ultrasonic drilling and cutting, cleaning, medical devices, dental devices, ultrasonic testing, cavitation, and vaporization.

The PDUS210 can be controlled from multiple sources including a PC and the included software package, front panel controls, and/or external logic signals from a foot switch for example. An API for external controllers is also available for RS485 and USB connections, which are suitable for automatic test applications and embedded industrial machinery.

The PDUS210 generates a pure sine-wave output which is ideal for operating at the electrical parallel resonance, or ‘anti-resonance’. This operating point is close to the mechanical resonance frequency but is less sensitive to changes in load dissipation, which is useful in precision machining applications where constant vibration amplitude is desired. Current and power control are also available for regulating vibration amplitude at the series resonance mode.

The PDUS210 is available with standard output voltage ranges from 17 Vrms to 282 Vrms, and current ranges from 0.7 Arms to 11 Arms. These ranges are optimized for load impedances ranging from 1.5 Ohms to 400 Ohms at resonance. For research and development applications, a reconfigurable version is available (PDUS210-FLEX), this version uses external output matching transformers to allow operation at any of the available output voltage ranges.

Ultrasonic Drive Methods

For an introduction to driving ultrasonic transducers, refer to Introduction to Ultrasonic Drivers


Electrical Specifications
Output Voltage 0 - 800 Vp-p See standard voltage ranges
Output Current Max 0 - 32 Ap-p See standard voltage ranges
Load Impedance 1 Ohm - 5 kOhm See standard voltage ranges
Output Waveform Sine wave  
DC Output Voltage Zero DC Offset Possible
Output Isolation Isolated Output Grounded also possible
Max Output Power 210 W With optimal load impedance
Internal Power Dissapation 150 W Maximum
Frequency Range See table below 6 kHz to 500 kHz with modifications
Power Supply 100VAC - 250VAC IEC Connector
Controller Phase tracking Resonance or anti-resonance
Interface USB, RS485, Logic Software APIs are available

Standard Output Voltage Range

The following table lists the specifications of each model variant, including: the maximum output voltage, the maximum output current, optimal load impedance and the recommended frequency range.

Order Code

 Max Volt


Max Volt


Max Curr

Amps pk-pk

Max Curr

Amps RMS


Load Ohms

Load Range




PDUS210-800 800 282 2 0.71 400 260-840 20-200
PDUS210-600 600 212 2.6 0.92 225 146-472 20-200
PDUS210-400 400 141 4 1.4 100 65-210 20-200
PDUS210-200 200 70 8 2.8 25 16-52 20-200
PDUS210-100 100 35 16 5.7 6.25 4-13 20-200
PDUS210-50 50 17 32 11.3 1.56 1-3 20-200

Note: The output voltage resolution and tolerance is 8 bits, or 256 levels. Therefore, the smallest possible change in voltage is full-scale range / 256. The minimum output voltage is also limited by resolution. When the amplifier is enabled and the output voltage is set to zero volts, the actual output voltage may be up to 1% of the full-scale range.

*The load impedance range is the range of impedances which guarantee more than 100W of power supplied to the load. Higher or lower impedances can be driven but with reduced power. The relationship between maximum achievable power and the load impedance is plotted in the following figure. In this plot, the impedance is normalized by the optimal impedance; that is,

Power Imped Form

For example, the optimal impedance of the PDUS210-400 is 100 Ohms, so with a 50 Ohm load, the normalized impedance is 0.5, From the plot, it can be observed that greater than 100 W can be achieved with a normalized impedance from 0.65 to 2.1, which for the PDUS210-400, is 65 Ohms to 210 Ohms.

PDUS210 powerVsZ lg

The impedance ranges for other common power levels are listed in the following table. For example, all amplifiers will supply more than 150W with a normalized load impedance between 0.71 and 1.4. For the PDUS210-400, this is equivalent to 71 Ohms and 140 Ohms.

Minimum PowerZ LowZ High
150 W 0.71 x Zopt 1.4 x Zopt
100 W 0.65 x Zopt 2.1 x Zopt
50 W 0.53 x Zopt 4.2 x Zopt

Mechanical Specifications

Enclosure Dimensions 304.8 x 212 x 88 mm (12 x 8.35 x 3.46 In) (L x W x H)
Mass 2 kg (4.4 lb)
Temperature Range 0C - 50C (32 - 122F)
Humidity Non-condensing

PDUS210-FLEX Specifications

The PDUS210-FLEX is identical to the standard PDUS210 except that it requires an external transformer connected between the amplifier and transducer using the supplied cable. This allows the user to switch between different output voltage ranges by changing the external transformer. Please refer to the section PDUS210-FLEX Operation for instructions.

The PDUS210-FLEX must be purchased with at least one external transformer. The available part numbers and specifications are:

Order CodeTurns Ratio Volt  pk-pkVolt RMSAMPS pk-pkAmps RMSOptimal Load OhmsLoad Range Ohms*Freq kHz
TX210-800 18.18 800 282 2 0.71 400 260-840 20-200
TX210-600 13.64 600 212 2.6 0.92 225 146-472 20-200
TX210-400 9.09 400 141 4 1.4 100 65-210 20-200
TX210-200 4.55 200 70 8 2.8 25 16-52 20-200
TX210-100 2.27 100 35 16 5.7 6.25 4-13 20-200
TX210-50 1.14 50 17 32 11.3 1.56 1-3 20-200

A kit containing five transformers ranging from 35Vrms to 282Vrms is also available (TX210-Kit1). This includes the following output voltage ranges:  35, 70, 141, 212, and 282 Vrms.

TX210 LG

Specification Value Notes
Input Connector Plug-in screw Terminal Connectin cable supplied
Output Connectors Identical to PDUS210 See "Front Panel" Section
Transformer Dimensions 104 x 57 x 51 mm L x W x H
Mass 0.2 kg  

Desktop Software

The desktop application controls the amplifier and plots the key signals and operating conditions, which can be logged and exported as CSV files. The desktop application also includes advanced analysis functions such as impedance frequency response analysis, and a setup assistant to help new users analyze and choose operating conditions. Please refer to the manual for a full description.

PDUS210V5 Desktop lg

Standard Delivery Contents

  • PDUS210 Amplifier (in chosen configuration)
  • IEC Power cable suited to the destination shipping address
  • USB Cable (Type A)
  • 3 Way plug-in screw terminals for output (Amphenol TJ0331530000G)
  • 4 Way plug-in screw terminal for RS-485 connector (Amphenol TJ0431530000G)

Legacy Product Version 4

pdf-icon_sm PDUS210 Manual

Download Desktop Software, Version: 300007

Download Firmware, Version: 300011

Download 3D Model

Quick Start Guide Video


Warranty and Service

The PDUS210 is guaranteed against manufacturing defects for 12 months from the date of purchase. Contact Micromechatronics, Inc for service. Please include the amplifier serial number.

More Information

101 Innovation Blvd. Suite 308
State College, PA 16803, USA
Ph: (814)-861-5688