Data Sheet
SN11300
3 In 1 USB Audio Controller
XVI. PCB Layout note
1. USB D+ and D- lines must as short as possible on PCB, it avoids
mismatch on PCB line’s impedance. In Sonix’s evaluation board, D+ and
D- line length had less than 50 mm.
2. C1, C2 and R2 are the group of PLL’s LPF. Those must close to the pin
of LF_FT.
3. Place power supply bypass capacitors as close as possible to SN11300
power input pins, in order to minimize the return path impedance. The
components included C7, C8, C9, C10, C11, C12, C13, C15, C16, C17,
C21, C22, C23, C24, C31, C20, C43, and C45.
4. VREF_DAC and VREF_ADC bypass capacitor C32 and C33 must close
to those two pins.
5. Crystal circuit must close to pin XOUT and pin XIN, it avoids EMI/EMC
effect.
Sonix Confidential
- 39 -
Do not copy, reproduce, or distribute without permission
2008 Mar 6, V1.3
SONIX [ SONIX TECHNOLOGY COMPANY ]
