Layout recommendations

AN4348

20/25

DocID025166 Rev 1

13

Layout recommendations

Apply standard recommendations to the layout of your electrochemical sensing application.

A good decoupling of the power supplies should be observed. Please refer to the datasheet

of the op-amps TSU10x, TSV71x, TSV73x, and TSZ12x. Alternatively, use a 1 µF

capacitor and a 22 nF capacitor close to each integrated circuit.

Pay attention to the nodes around the sensor which are in relative high impedance. The

use of short tracks is recommended. A guard ring around the sensitive (high impedance)

nodes is illustrated in Figure 11 and is also recommended with a proper coating of PCB.

Figure 11: Application layout with guard ring