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Falco Systems WMA-100 User Manual

High voltage amplifier dc - 500khz
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Falco Systems WMA-100
High Voltage Amplifier DC - 500kHz

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Summary of Contents for Falco Systems WMA-100

  • Page 1 USER manual Falco Systems WMA-100 High Voltage Amplifier DC - 500kHz...

  • Page 3: About This Manual

    • Short-circuit protected output • Adjustable DC offset About this manual This user manual is an integral part of the Falco Systems WMA-100 high voltage amplifier product. Please read it carefully and pay attention to the recommenda- tions and instructions for safe use.
  • Page 4 • Always position the WMA-100 amplifier such that the on/off power switch is easily accessible. • The airflow to and from the WMA-100 amplifier should not be blocked or impeded, both at the front and the back side. • The internal circuitry of the amplifier operates at high voltage. Only qualified personnel from Falco Systems should service this amplifier.
  • Page 5 Detailed properties of the WMA-100 high voltage amplifier Input The input impedance of the WMA-100 high voltage amplifier is a 100kΩ resistor to ground, in parallel with 68pF to prevent electrostatic discharge (ESD) input damage. This resistor adds some noise to the output voltage unless a low-impe- dance source (e.g.
  • Page 6 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 1. A 10x probe connected for monitoring the output signal Noise The noise of the amplifier (~350μVrms) is lowest when a low-impedance source is used, such as a pre-amplifier output or a 50Ω function generator output. An easy way to assess the noise performance of the amplifier without picking up interference is to connect a 50Ω...

  • Page 7: Offset Adjustment

    Offset adjustment The WMA-100 model provides an offset control knob to enable the amplifier to generate offset voltages over the full output range (Fig. 3). The offset control can be switched to ‘Off’ with a small rocker switch on the front panel to obtain the lowest noise and highest DC stability of the amplifier.

  • Page 8: Transmitter Mode

    WMA-100, High Voltage Amplifier DC - 500kHz The load The output impedance of the WMA-100 model is 50Ω, to ensure stability with all capacitive loads. The amplifier is generally used for high-impedance ap- plications where the load is capacitive. This is the case for MEMS devices, EO-modulators and piezo’s alike.
  • Page 10 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 4. Frequency response at 300Vpp output voltage with different capacitive loads Figure 5. Frequency response at 1Vpp output voltage with different capacitive loads...
  • Page 11 Figure 6. Sine wave 300Vpp 1kHz Figure 7. Triangle wave 300Vpp 1kHz...
  • Page 12 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 8. Square wave 300Vpp 1kHz Figure 9. Square wave 300Vpp 100kHz...
  • Page 13 Figure 10. Square wave 1Vpp 100kHz (small signal response) Figure 11a. 300Vpp step response 10-90%: up in 1.0μs...
  • Page 14 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz...
  • Page 16 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 11b. 300Vpp step response 10-90%: down in 0.9μs Figure 11c. 0 to 150V step response 10-90%: up in 0.8μs...
  • Page 17 Figure 11d. 150 - 0V step response 10-90%: down in 0.8μs Figure 12a. 0pF load...
  • Page 18 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 12b. 100pF load Figure 12c. 1nF load...
  • Page 19 Figure 12d. 10nF load Figure 12e. 100nF load...
  • Page 20 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 12f. 1μF load Figure 12g. 10μF load Figure 12. 300Vpp square wave response under different capacitive loading conditions. The 100mA current limit limits the speed at which the capacitor can be charged.The bandwidth adjustments of the amplifier with different capacitive...
  • Page 21 Figure 13. Noise (~350μVrms measured with a true rms voltmeter) and typical offset with the offset control switched to ‘Off’. The noise and offset may appear to be higher than shown here if the amplifier input is not connected to a low- impedance source.
  • Page 22 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz Figure 15. Noise spectrum (262144 bins 15MHz FFT) with offset control swit- ched to ‘Off’. Figure 16. Rms output noise voltage versus capacitive load with offset control switched to ‘Off’.

  • Page 23: Technical Specifications

    Safety : EN61010-1 : EN61326 WEEE and RoHS Do not dispose of the WMA-100 amplifier as standard waste, but bring it to a WEEE electronic waste collection point. The amplifier has been built in compliance with the RoHS directive.
  • Page 24 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz...

  • Page 26: Warranty

    Falco Systems will not be liable for any consequential damages, including, without limitation, devices or equipment connected to the product, injury to persons or property or loss of use. See for more details the Falco Systems Standard Terms and Conditions of Sale, which can also be obtained via...
  • Page 28 Falco Systems WMA-100, High Voltage Amplifier DC - 500kHz www.falco-systems.com User manual version 2.1 March 2016...