7
Rev. 1.2 (04.2020)
Pin description
Pin
Name
Function
1,2,17,18
NC
This pins should not be connected and left floating
3
GND
Ground
4
CLK
Predefined clock signal. Frequency will be set to the
nominal 200 Hz, when this pin is connected to CLK_INT
(see image “Schematic 1” in chapter 0).
It is also possible to connect an external clock signal
with a
quadruplicated
frequency of the micropumps
frequency.
5
CLK_INT
When connected to CLOCK the frequency is set to
200 Hz.
6
AMP
The amplitude can be set with an analogue voltage
between 0.5 V to 1.3 V.
7
A0
Address Input 0. Address inputs allow up to four
connections on one common bus. Connect A0 to GND or
VDD.
8
P1+
Piezo actuator 1, positive electrode (see page 9)
9
P1-
Piezo actuator 1, negative electrode (see page 9)
10
P2-
Piezo actuator 2, negative electrode (see page 9)
11
P2+
Piezo actuator 2, positive electrode (see page 9)
12
A1
Address Input 1. Address inputs allow up to four
connections on one common bus. Connect A1 to GND or
VDD.
13
SCL
Serial-Clock Input. SCL requires an external pullup
resistor.
14
SDA
Open-Drain, Serial Data Input/Output. SDA requires an
external pullup resistor.
15
/RESET
If the I2C-Bus is to be used, the internal processor has to
be disabled by applying GND to this pin. Otherwise
connect this pin to VDD for normal operation.
16
VDD
Input Supply voltage
