DocID025583 Rev 1

5/8

AN4409

Tuning capacitance specification vs tuning reference value

8

3

Tuning capacitance specification vs tuning reference

value

Figure 2 shows the serial equivalent tuning capacitance typical variation of either the

reference for antenna design: in other words, customers have to design antennas which

inductance satisfies the following relationship, showed by Equation 6:

Equation 6

Vdatasheet corresponds to the voltage level used for better correlation with measurements

in production.

M24SR

1

2

VRFmin

⋅

-------------------------------------------

→

1

VRFmin

ω

2

⋅

--------------------------------

==