Analog Devices ADICUP3029 User Manual page 16

UG-1292
Linear Sweep Voltammetry
Linear Sweep Voltammetry is an electrochemical measurement
in which the voltage applied to an electrochemical cell is
incremented linear to a point then decremented linear, in the
shape of triangle (a ramp signal up and then back down). The
response current on the working electrode is measured.
To perform a linear sweep voltammetry validation test using
the AD5940 evaluation board, follow the instructions below:
1. Plug the AD5940 evaluation board (EVAL-AD5940ARDZ)
into the Arduino connectors on the ADICUP3029.
2. Plug the AD5940Sens2 daughter card into
the AD5940ARDZ board as in Figure 34.
Figure 34. Hardware Setup for Linear Sweep Voltammetry Validation TestOn
the AD5940Sens2 board, place a jumper on JP6 between PIN1 and PIN2 (the
right-hand column) as in Figure 35. This connects a 750 Ω resistor network to
the AD5940.
Table 5. Linear Sweep Voltammetry Parameters
Parameter
Ramp Start
Ramp Peak
Points
Sample Delay
Ramp Duration
Transimpedance Amplifier Resistance
1 For more information on voltammetry measurements on the AD5940, refer to the AN-1563.
EVAL-AD5940 Evaluation Kit User Guide
Figure 35. JP6 Jumper Configuration for Voltammetry Test on Sens2 Board
3.
4.
5.
6.
Description
Starting voltage of the ramp signal
Peak voltage of the ramp signal
The voltage ramps from Ramp Start to
Ramp Peak in Points equal increments
Time for signal to settling before sampling
again
The voltage ramps from Ramp Start to
Ramp Peak for this amount of time
Resistor value in the feedback loop of the
transimpedance amplifier (depends on the
maximum current range) 1
7.
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Connect the ADICUP3029 to the PC via the USB-to-
microUSB cable.
Open the SensorPal GUI and ensure the correct COM port
is connected.
Under the Electrochemical Techniques section in the tool
belt, drag the Linear Sweep Volt measurement into the
work area. Delete any other existing measurements in the
work area by hovering over the measurement and pressing
the trash bin icon in the bottom right corner.
Click the Linear Sweep Volt measurement to highlight it
and view the configurable parameters beneath. The
parameters that can be set are shown in Table 5.
Value for Test
−1000 mV
1000 mV
866
20 ms
30000 ms
200 Ω
Once the desired parameters are set, press the green
Measure button to begin collecting data. The device will