SI4825-DEMO Datasheet, PDF (5/12 Pages) Silicon Laboratories – Si4825 DEMO BOARD USERS GUIDE

Si4825-DEMO
Tuner Output Test Point:
For the tuner specification test, TP1 is the recommended tuner output test point. The audio test instrument should
be connected to TP1 to get accurate test results.
1
AOUT
2
GND
Main Components:
U1: Silicon Laboratories Si4825 AM/FM/SW ATAD receiver
U2: Audio amplifier
Frequency scale: The analog display for tuning frequency
Control Interface:
VR1: Frequency tuning wheel.
VR2: Volume control wheel
S3,S4: The push buttons for volume control
J4: Tuner VDD connector (connect tuner Pin14 VDD to VBAT or VCC)
1
2
3
1-2: VBAT
2-3: VCC
J8: SW Wide/Narrow-band selector
1
2
3
1-2: SW Narrow-band
2-3: SW Wideband
Rev. 0.1
5