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Falco Systems WMA-200
● Ultra-low output noise: ~50µV
bandwidth; ~20µV
box
● High voltage: 20.0x precision amplification up to +175V and -175V
output voltage with respect to ground
● Short-circuit protected output with 275mA output current capability
● No overshoot with capacitive loads: bandwidth changes automatically
to ensure stability
● 2 inputs: a standard BNC connector, and a differential connector to
reject interference (mating connector supplied)
● BNC monitor out connector provides 1:100 replica of the output signal
About this manual
This user manual is an integral part of the
Falco Systems WMA-200 high voltage
amplifier product. Please read it carefully
and pay attention to the recommendations
and instructions for safe use.
The
WMA-200
high
amplifier: getting started
The Falco Systems WMA-200 model is a
high quality, high voltage, linear laboratory
amplifier
optimized
requiring
world-class,
noise. The excellent noise performance,
combined with the wide bandwidth and
large voltage range make this amplifier the
preferred choice for the most demanding
USER MANUAL
rms
with DC – 500Hz using the supplied load capacitor
rms
voltage
for
experiments
ultra-low
output
50/20µV Low noise HV Amplifier
with DC – 100kHz large signal
precision
positioning
amplifier will routinely enable sub-atomic
positioning
resolution
positioning systems and MEMS devices,
and is the ultimate ultra low noise driver
for
EO-modulators,
steering, ultrasonics, dielectric studies,
and many other loads requiring a high
voltage drive.
The output noise level of the high voltage
amplifier is only ~50µV
rms
large signal bandwidth of DC – 100kHz.
For even lower noise in experiments
where this large bandwidth is not required,
a capacitor load box is supplied with the
amplifier. It cuts the bandwidth to DC –
500Hz, at the same time reducing the
output noise level to an unprecedented
~20µV
. Keep input and output cables as
rms
short as possible to prevent picking up
interference from the surroundings. For
systems.
The
with
piezo
(particle)
beam
with its standard
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Summary of Contents for Falco Systems WMA-200
-
Page 1: User Manual
DC – 100kHz. For even lower noise in experiments The Falco Systems WMA-200 model is a where this large bandwidth is not required, high quality, high voltage, linear laboratory a capacitor load box is supplied with the... - Page 2 ‘Noise’ section later accessible. in this manual. - The airflow to and from the WMA-200 The WMA-200 high voltage amplifier is amplifier should blocked designed to be fully stable and free of impeded, at the front, sides and the back.
- Page 3 Inverting (-) Non-inverting (+) Ground Figure 1. Signals to be supplied to the BNC and differential connector A low noise amplifier like the WMA-200 significant overshoot occurs model can never be made fully insensitive capacitive load. The bandwidth of the...
- Page 4 Fig. 3. performance of the amplifier has been Figure 2. Assessment of the ultimate attainable output noise level of the WMA-200 high voltage amplifier requires care not to beak the coaxiality of the connection. Cables should be as short as possible (or even absent, as in this example) not to pick up any interference, which will appear directly across the load.
- Page 5 For all other reader is referred to the Falco Systems cases, a shielded 1uF load capacitor box application note ‘High voltage amplifiers: is supplied with the amplifier, which is so you think you have noise!’, online at...
- Page 6 output noise voltage versus - Sine and triangle wave responses (Fig. capacitive load (Fig. 7) 11, 12) - Noise and offset without capacitor box - Square wave response (Fig. 13, 14, 15) (Fig. 8) - Step response (Fig. 16) - Noise and offset with capacitor box (Fig. - Capacitive load dependency of square wave output (Fig.
- Page 7 Capacitance (pF) Figure 7. Rms output noise voltage versus capacitive load -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 Time (ms) Figure 8. Noise without output loading, and with the the 1µF capacitor box connected, plus typical offset. The noise, as measured with a true rms voltmeter in a 1MHz bandwidth, is 48µV with no load, and 18µV with the 1µF load connected.
- Page 8 -100 -150 Time (ms) Figure 10. Triangle wave 300V 1kHz -100 -150 Time (ms) Figure 11. Square wave 300V 1kHz -100 -150 Time (µs) Figure 12. Square wave 300V 20kHz...
- Page 9 -0.2 -0.4 Time (µs) Figure 13. Square wave 1V 20kHz (small signal response) -100 -150 Time (µs) Figure 14a. 300V step response 10-90%: up in 4.4µs -100 -150 Time (µs) Figure 14b. 300V step response 10-90%: down in 4.2µs...
- Page 10 Time (µs) Figure 14c. 0 to 150V step response 10-90%: up in 3.5µs Time (µs) Figure 14d. 150 - 0V step response 10-90%: down in 3.8µs Figure 14. Unipolar and bipolar step response -100 -150 Time (µs) Figure 15a. 0pF load...
- Page 11 -100 -150 Time (µs) Figure 15b. 100pF load -100 -150 Time (µs) Figure 15c. 1nF load -100 -150 Time (µs) Figure 15d. 10nF load...
- Page 12 -100 -150 Time (ms) Figure 15e. 100nF load -100 -150 Time (ms) Figure 15f. 1µF load -100 -150 Time (ms) Figure 15g. 10µF load Figure 15. 300V square wave response under different capacitive loading conditions. The 275mA 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 13: Weee And Rohs
Falco Systems. WEEE and RoHS To obtain warranty service, the customer has to inform Falco Systems first via Do not dispose of the WMA-200 amplifier info@falco-systems.com to receive further as standard waste, but bring it to a WEEE instructions. - Page 14 User manual version Falco Systems User manual version: 1.3 Falco Systems Date: December 9, 2016 Remisestraat 1 2225 TH Katwijk aan Zee The Netherlands Tel. +31 (0)6 21840996 Fax. +31 (0)20 2031 445 Email: info@falco-systems.com http://www.falco-systems.com...
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