SI4840-DEMO Datasheet, PDF (1/22 Pages) Silicon Laboratories – Si4840/44 DEMO BOARD USERS GUIDE

Si4840/44-DEMO
Si4840/44 DEMO BOARD USER’S GUIDE
1. Features
 ATDD (analog tune and digital display) FM/AM/SW radio
 Worldwide FM band support from 64 to 109 MHz with 5 default sub-bands:
FM1
87–108 MHz (Demo Board Default)
FM2
86.5–109 MHz
FM3
87.3–108.25 MHz
FM4
76–90 MHz
FM5
64–87 MHz (Demo Board Default)
 Worldwide AM band support from 504 to 1750 kHz with 5 default sub-bands:
AM1
520–1710 kHz (Demo Board Default)
AM2
522–1620 kHz(Demo Board Default)
AM3
504–1665 kHz
AM4
520–1730 kHz
AM5
510–1750 kHz
 Worldwide SW band support from 2.3 MHz to 28.5 MHz with 16 default sub-bands:
SW1
5.6–6.4 MHz (Demo Board Default, for Si4844 only)
SW2
5.95–6.2 MHz
SW3
6.8–7.6 MHz (Demo Board Default, for Si4844 only)
SW4
7.1–7.6 MHz
SW5
9.2–10 MHz (Demo Board Default, for Si4844 only)
SW6
9.2–9.9 MHz
SW7
11.45–12.25 MHz (Demo Board Default, for Si4844 only)
SW8
11.6–12.2 MHz
SW9
13.4–14.2 MHz (Demo Board Default, for Si4844 only)
SW10
13.57–13.87 MHz
SW11
15–15.9 MHz (Demo Board Default, for Si4844 only)
SW12
15.1–15.8 MHz
SW13
17.1–18 MHz (Demo Board Default, for Si4844 only)
SW14
17.48–17.9 MHz
SW15
21.2–22 MHz (Demo Board Default, for Si4844 only)
SW16
21.45–21.85 MHz
 Twelve-position slide switch or one push button for selecting different bands according to the target application
 Two AAA battery operations with working voltage down to 2.0 V
 Economical potentiometer for frequency tuning replaces more expensive variable capacitor (PVC)
 Potentiometer and/or push button volume control
 FM 50 µs or 75 µs (default) de-emphasis
 FM stereo indication threshold 6 dB separation at 20 dBµv RF input (default) or 12 dB separation at 28 dBµv RF
input
 9-level Bass/Treble via push button control for FM
 7-level Bass/Treble via push button control for AM/SW
 FM/AM/SW band indicator and frequency display in LCD
 2x4 matrix keypad
 The frequency range of each band, the ST indication threshold, de-emphasis and AM channel space can be
reconfigured by host MCU.
Rev 0.1 8/11
Copyright © 2011 by Silicon Laboratories
Si4840/44-DEMO