1. DL manuals
  2. Falco Systems
  3. Amplifier
  4. WMA-100
  5. User Manual

Falco Systems WMA-100 User Manual

Other manuals for WMA-100: User Manual
Manual is about: High Voltage Amplifier DC - 500kHz

Summary of WMA-100

  • Page 1

    User manual ● 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 rms , and even lower when capacitive loads are driven ● no overshoot with capacitive loads: band...

  • Page 2

    Recommendations: - never apply more than +15v (-15v) to the amplifier input to prevent damage. - a short voltage spike may appear at the output, when the amplifier is turned on or off. Pay attention not to damage sensitive circuitry or equipment already connected. - the amplifier cannot be damaged b...

  • Page 3

    Fast current limiting circuit that has been employed. If output monitoring is required, it is recommended to connect a 10x oscilloscope probe to the output. A special bnc to probe tip connector is usually supplied with the probe (fig. 1). However, the user can choose a different way of connecting th...

  • Page 4

    Figure 3. Offset circuitry ‘on-off’ switch and offset control knob 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 applications where the load is capacitive. This is the case for mems devices...

  • Page 5

    Frequency (hz) 20 15 10 5 0 10 2 10 3 10 4 10 5 10 6 10 7 0pf 100pf 1nf 10nf 100nf 1uf 10uf a m p lif ic a ti o n fa c to r figure 4. Frequency response at 300v pp output voltage with different capacitive loads frequency (hz) a m p lif ic a ti o n fa c to r 20 15 10 5 0 10 2 10 3 10 4 10 5 10 6 10 7...

  • Page 6

    Time (ms) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 2.0 1.5 1.0 0.5 0.0 figure 7. Triangle wave 300v pp 1khz time (ms) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 2.0 1.5 1.0 0.5 0.0 figure 8. Square wave 300v pp 1khz time (µs) o u tp u t v o lt a g e ( v ) -150 -100 -50 ...

  • Page 7

    Time (µs) o u tp u t v o lt a g e ( v ) -0.4 -0.2 0.0 0.2 0.4 20 15 10 5 0 figure 10. Square wave 1vpp 100khz (small signal response) time (µs) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 3.0 2.5 2.0 1.5 1.0 0.5 0.0 figure 11a. 300vpp step response 10-90%: up in 1.0µs time (µs) o u tp u...

  • Page 8

    Time (µs) o u tp u t v o lt a g e ( v ) 160 140 120 100 80 60 40 20 0 3.0 2.5 2.0 1.5 1.0 0.5 0.0 figure 11c. 0 to 150v step response 10-90%: up in 0.8µs time (µs) o u tp u t v o lt a g e ( v ) 160 140 120 100 80 60 40 20 0 3.0 2.5 2.0 1.5 1.0 0.5 0.0 figure 11d. 150 - 0v step response 10-90%: down ...

  • Page 9

    Time (µs) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 20 15 10 5 0 figure 12b. 100pf load time (µs) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 40 30 20 10 0 figure 12c. 1nf load time (µs) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 200 150 100 50 0 figure 12d....

  • Page 10

    Time (ms) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 2.0 1.5 1.0 0.5 0.0 figure 12e. 100nf load time (ms) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 20 15 10 5 0 figure 12f. 1µf load time (ms) o u tp u t v o lt a g e ( v ) -150 -100 -50 0 50 100 150 200 150 100 50 0 figur...

  • Page 11

    12 10 8 6 4 2 0 50 40 30 20 10 0 time (ms) o u tp u t v o lt a g e ( m v ) figure 13. Noise (~350µv rms 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 connect...

  • Page 12

    350 300 250 200 150 100 50 10 2 10 3 10 4 10 5 10 6 10 7 capacitance (pf) r m s o u tp u t v o lt a g e n o is e (µ v ) figure 16. Rms output noise voltage versus capacitive load with offset control switched to ‘off’. Technical specifications amplification: 20x, fixed bandwidth: dc – 500khz @ -3db l...

  • Page 13

    Warranty falco systems products are guaranteed against malfunction due to defects in materials or workmanship for a period of 1 year from the date of shipment. If a malfunction occurs during this period, the product will be repaired or replaced without charge. The product will be returned to the cus...