CV0452021-200 Test Fixture

Testing Concept

The tester measures the admittance of nodes where each node is formed by a cross section between a row electrode and a column electrode. The tester sends an AC voltage on a row and calculates the current returning on a column. 

Hardware Components

Hardware Components The CV0452021-200 features three main pieces of hardware. The test controller, which is the black box to the left in figure 1. This is the main functional circuit that measures the admittance of the sensor’s row-column cross sections, calculates the values and sends the data to a computer.

The second piece of hardware is the test adapter, the green circuit shown in figure 1. This adapter contains the traces and connections that drive the test signals to corresponding rows and columns. The final piece of hardware is the quick connector, the aluminum unit which the DUT is inserted.

Our quick connector is rated at 20,000 plus cycles, whereas a standard ZIP-Lock connector has a limited actuation life.

Device Under Test (DUT)

The touchscreen on the right in figure 1 is the Device Under Test. For this demo unit, the CV0452021-200, is designed for use with a 7” Touch Screen Display. This touchscreen is shipped with the test fixture for customer evaluation. Virtually any style of touch screen can be fitted to work the CV0452021-200.

System Requirements and Software

  • PC with Windows 7, 8, or 10
  • Software installation: Copy or unzip “PCapTest” folder to the test computer and run the executable file. No separate installation is needed.

Mechanical Settings

There is an USB-A to Mini-B cable included with the tester. One end of the cable is connected to the tester pre-installed; connect the other end to a test computer and make sure the tester is recognized by Windows Device Manager. Connect the ribbon cables from the DUT touchscreen into the aluminum quick connector. Unit is ready to test.

GUI During Test