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9
Examples of circuiting the mp6-XOEM
Operation with fixed settings
The mp6-XOEM can operate the micropumps of the mp6-series without further external components. In this case,
frequency and amplitude to the micropump are predefined to
250 Vpp and 200 Hz
by the internal circuit.
Schematic 1: Predefined amplitude of 250 Vpp and frequency of 200 Hz by internal circuit.
Operation with variable settings via external components
In this example, amplitude to the micropump will be defined by external components. The amplitude can be varied
in the range from 0 Vpp to 250 Vpp.
Using a voltage divider it is possible to set the amplitude with only two additional resistors. See image
"Schematic 2" below for an example. First picture shows two resistors generating the reference voltage for the
AMP-pin. The voltage at the AMP-pin can be calculated with this formula:
R
1
V
V
AMPLITUDE
DD
R
1
R
2
As an alternative an appropriate potentiometer can be used to adjust the reference voltage. On the second picture
a potentiometer and an offset resistor are used to generate the reference voltage for the AMP-pin.
Rev. 1.2 (04.2020)
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