SI4827-DEMO Datasheet, PDF (4/16 Pages) Silicon Laboratories – Si4827 DEMO BOARD USERS GUIDE

Si4827-DEMO
Main Components:
U1: Silicon Laboratories Si4827 AM/FM/SW ATDD receiver
U2: Audio amplifier
U3: MCU
LCD: The digital display for tuning information
Control Interface:
VR1: Frequency tuning wheel.
VR2: Volume control wheel
S3~S10: The keypad for human interface
S2: Band switch for FM, AM, and SW
1 2 3 4 5 6 7 8 9 10 11 12
Band definition for the slide switch is as below:
1: FM1 (W 64–108 MHz) (N 87–108 MHz), De-emphasis = 75 µs, ST indication = 6 dB separation@20 dBµV
2: FM5 (W 76–108 MHz) (N 64–87 MHz), De-emphasis = 75 µs, ST indication = 6 dB separation@20 dBµV
3: AM1 (520–1710 kHz), 10 kHz spacing
4: AM2 (522–1620 kHz), 9 kHz spacing
5:SW1 (W 3.2–7.6 MHz) (N 5.6–6.4 MHz)
6:SW3 (W 3.2–10.0 MHz) (N 6.8–7.6 MHz)
7:SW5 (W 5.9–18.0 MHz) (N 9.2–10.0 MHz)
8:SW7 (W 7.0–16.0 MHz) (N 11.45–12.25 MHz)
9:SW9 (W 7.0–23.0 MHz) (N 13.4–14.2 MHz)
10:SW11 (W 9.0–22.0 MHz) (N 15–15.9 MHz)
11:SW13 (W 9.5–18.0 MHz) (N 17.1–18 MHz)
12:SW15 (W 10.0–22.0 MHz) (N 21.2–22 MHz)
Note: N = SW Narrow-band, W = SW Wideband
4
Rev. 0.1