Si4827-DEMO

4

Rev. 0.1

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

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

3

2

1

45

6

78

9

11

10

12