SLLS783C May 2009 – March 2016 TSB81BA3E
PRODUCTION DATA.
Another means to minimize EMI emissions is to add decoupling capacitors with a ferrite bead at PLLVDD pin and DVDD pins of the chip. This array should be as close as possible to the chip in order to minimize the inductance of the line and minimize noise contributions to the system, a suggested example is shown in Figure 11(a) and Figure 11(b). In the case of DVDD pins, it is recommended to tie them up to a single low impedance point in the board and then adding the decoupling capacitors in addition to the ferrite bead. This array of caps and ferrite bead improve EMI and Jitter performance. Both EMI and Jitter should be taken into account before altering the configuration.