Figure 44 suggests a possible routing for the TSC21x, in order to minimize as much as possible parasitic effect.

Figure 44. Recommended layout

6.11

EMI rejection ration (EMIRR)

The electromagnetic interference (EMI) rejection ratio, or EMIRR, describes the EMI immunity of a current

sensing device. An adverse effect that is common to many current sensings is a change in the offset voltage as a

result of RF signal rectification.

A first order internal low pass filter is included on the input of the TSC21x to minimize susceptibility to EMIRR.

Figure 45 shows the EMIRR on pin IN+, Figure 46 shows the EMIRR on pin IN- of the TSC21x measured from 10

MHz up to 2.4 GHz.

Figure 45. EMIRR on pin+

Figure 46. EMIRR on pin-

TSC210, TSC211, TSC212, TSC213, TSC214, TSC215

Application information

DS13237 - Rev 7

page 23/38