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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: 20x amplification up to +175V and -175V output voltage
with respect to ground
● DC to 500kHz at (-3dB) large signal bandwidth and 100mA output
current
● Very low noise: ~350µV
driven
● No overshoot with capacitive loads: bandwidth changes automatically
to ensure stability
● 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 recommendations
and instructions for safe use.
The
WMA-100
amplifier: getting started
The Falco Systems WMA-100 model is a
high quality, cost-effective, high voltage,
linear
laboratory
amplifier.
bandwidth and large voltage range make it
an excellent choice for use with MEMS
USER MANUAL
, and even lower when capacitive loads are
rms
high
voltage
Its
wide
High Voltage Amplifier DC – 500kHz
devices, EO-modulators, piezo positioning
systems,
beam
steering,
dielectric
studies,
applications. It is designed to be fully
stable and free of spurious signals with
any capacitive load.
The amplification is 20x (fixed). The
amplifier has a range of –175V to +175V,
a large signal bandwidth of 500kHz @ -
3dB, a typical slew rate of 350V/µs, and a
noise level of ~350µV
protection with a fast current limit of
±100mA make this amplifier suitable for
both normal daily laboratory use and
automated measurement systems.
ultrasonics,
and
many
other
. The short-circuit
rms

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Summary of Contents for Falco Systems WMA-100

  • Page 1 3dB, a typical slew rate of 350V/µs, and a noise level of ~350µV . The short-circuit The Falco Systems WMA-100 model is a protection with a fast current limit of high quality, cost-effective, high voltage, ±100mA make this amplifier suitable for...
  • Page 2 - Always position the WMA-100 amplifier damaged if the current of the source is not such that the on/off power switch is easily limited. accessible. - The airflow to and from the WMA-100 amplifier should blocked Output impeded, both at the front and the back side.
  • Page 3 Figure 2. If assessment of the amplifier noise is necessary, connect e.g. a 50Ω coaxial load resistor to the input to provide a low-impedance input connection. Offset adjustment The WMA-100 model provides an offset the amplifier. Turning the offset control to control knob to enable the amplifier to ‘On’...
  • Page 4 Figure 3. Offset circuitry ‘On-Off’ switch and offset control knob The load The output impedance of the WMA-100 cable is recommended for the WMA-100 model is 50Ω, to ensure stability with all amplifier to obtain optimal results. capacitive loads. The amplifier is generally...
  • Page 5 100pF 10nF 100nF 10uF Frequency (Hz) Figure 4. Frequency response at 300V output voltage with different capacitive loads 100pF 10nF 100nF 10uF Frequency (Hz) Figure 5. Frequency response at 1V output voltage with different capacitive loads -100 -150 Time (ms) Figure 6.
  • Page 6 -100 -150 Time (ms) Figure 7. Triangle wave 300V 1kHz -100 -150 Time (ms) Figure 8. Square wave 300V 1kHz -100 -150 Time (µs) Figure 9. Square wave 300V 100kHz...
  • Page 7 -0.2 -0.4 Time (µs) Figure 10. Square wave 1Vpp 100kHz (small signal response) -100 -150 Time (µs) Figure 11a. 300Vpp step response 10-90%: up in 1.0µs -100 -150 Time (µs) Figure 11b. 300Vpp step response 10-90%: down in 0.9µs...
  • Page 8 Time (µs) Figure 11c. 0 to 150V step response 10-90%: up in 0.8µs Time (µs) Figure 11d. 150 - 0V step response 10-90%: down in 0.8µs Figure 11. Unipolar and bipolar step response -100 -150 Time (µs) Figure 12a. 0pF load...
  • Page 9 -100 -150 Time (µs) Figure 12b. 100pF load -100 -150 Time (µs) Figure 12c. 1nF load -100 -150 Time (µs) Figure 12d. 10nF load...
  • Page 10 -100 -150 Time (ms) Figure 12e. 100nF load -100 -150 Time (ms) Figure 12f. 1µF load -100 -150 Time (ms) 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 loads preventing overshoot are clearly visible.
  • Page 11 Time (ms) Figure 13. Noise (~350µV 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. Time (ms) Figure 14.
  • Page 12: Weee And Rohs

    Specifications may be subject to change Harmonized standards WEEE and RoHS This product complies with the following Do not dispose of the WMA-100 amplifier harmonized European standards: as standard waste, but bring it to a WEEE electronic waste collection point. The...
  • Page 13 1083 BA Amsterdam has to inform Falco Systems first via The Netherlands info@falco-systems.com to receive further Tel. +31 (0)6 21840996 instructions. Fax. +31 (0)20 2031 445 Falco Systems will not be liable for any Email: info@falco-systems.com consequential damages, including, without http://www.falco-systems.com...