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Si4822/26 D
Features
1.

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 to 28.5 MHz with 16 default sub-bands:
SW1 5.6–6.4 MHz (Demo Board Default, for Si4826 only)

SW2 5.95–6.2 MHz

SW3 6.8–7.6 MHz (Demo Board Default, for Si4826 only)

SW4 7.1–7.6 MHz

SW5 9.2–10 MHz (Demo Board Default, for Si4826 only)

SW6 9.2–9.9 MHz

SW7 11.45–12.25 MHz (Demo Board Default, for Si4826 only)

SW8 11.6–12.2 MHz

SW9 13.4–14.2 MHz (Demo Board Default, for Si4826 only)

SW10 13.57–13.87 MHz

SW11 15–15.9 MHz (Demo Board Default, for Si4826 only)

SW12 15.1–15.8 MHz

SW13 17.1–18 MHz (Demo Board Default, for Si4826 only)

SW14 17.48–17.9 MHz

SW15 21.2–22 MHz (Demo Board Default, for Si4826 only)

SW16 21.45–21.85 MHz


Twelve positions band switch or one push button for selecting different band 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

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

2×4 matrix keypad interface

The frequency range of each band, de-emphasis and AM channel space can be re-configured by host
MCU.
Rev. 0.1 11/11
B
EMO
OA RD
Copyright © 2016 by Silicon Laboratories
S i 4 8 2 2 / 2 6 - D E M O
U
'
G
SER
S
UIDE
Si4822/26-DEMO

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Summary of Contents for Silicon Laboratories Si4822-DEMO

  • Page 1 FM/AM/SW band indicator and frequency display in LCD  2×4 matrix keypad interface  The frequency range of each band, de-emphasis and AM channel space can be re-configured by host MCU. Rev. 0.1 11/11 Copyright © 2016 by Silicon Laboratories Si4822/26-DEMO...
  • Page 2 This manual describes the operation of the Silicon Labs Si4822/26-DEMO Board Rev1.0, October 24, 2011. The Silicon Laboratories Si4822/26-DEMO Board is designed with the 24-pin SSOP-packaged Si4822/26 chip, the revolutionary single chip AM/FM/SW receiver that integrates everything from antenna input to audio output and allows use of common and economical potentiometers to do the frequency tuning.
  • Page 3 Si4822/26-DEMO 3. Description Figure 1 and Figure 2 shows the physical layout of the board with key components indicated. Figure 1. Si4822/26-DEMO Board Top Side in Time Mode Figure 2. Si4822/26-DEMO Board Bottom Side Rev. 0.1...
  • Page 4 Si4822/26-DEMO Power: BAT1: 2 cells AAA battery compartment Audio Connectors: J5: Stereo audio headphone output Antenna Selections: AM antenna: Ferrite stick antenna for AM J6: SMA connector for AM conductive testing S11: AM antenna selector 1-2: SMA for AM Conductive Test 2-3: AM Ferrite Antenna J1: BNC connector for FM/ SW conductive testing or FM whip antenna S12: FM antenna selector...
  • Page 5 TP3 to get more accurate test results. J5 can also be used as an audio test point, but the test results may not be entirely accurate under some circumstances. AOUT Main Components: U1: Silicon Laboratories Si4822/26 AM/FM/SW ATDD receiver U2: Audio amplifier U3: MCU LCD: The digital display of tuning frequency...
  • Page 6 Si4822/26-DEMO Control Interface: VR1: Frequency tuning wheel VR2: Volume control wheel S3~S8, S10: The keypad S2: Band slide switch for FM, AM, and SW Band definition: 1: FM1 (87–108 MHz), De-emphasis = 75 µs 2: FM5 (64–87 MHz), De-emphasis = 75 µs 3: AM1 (520–1710 kHz), 10 kHz spacing 4: AM2 (522–1620 kHz), 9 kHz spacing 5: SW1 (5.6–6.4 MHz)
  • Page 7 Si4822/26-DEMO Table 1. Key Function Description Button/Mode Time Mode FM/AM/SW Radio Mode Tuner Off Tuner On POWER/BAND hold Time None Change between FM, AM, and SW (1 FM < 1s band, 1 AM band and 8 SW bands) hold Time Enable radio Disable radio function and enter Time mode >...
  • Page 8 Si4822/26-DEMO Table 2. Radio Configuration Parameters FM Parameter AM Parameter SW Parameter Bass/Treble: 0-8 Bass/Treble: 1-7 Bass/Treble: 1-7 Default: 4 Default: 3 Default: 3 Digital volume: 0-63 Digital volume: 0-63 Digital volume: 0-63 Default: 63 Default: 63 Default: 63 Band top: max 109 MHz Band top: max 1750 kHz Band top: max 28.5 MHz Default: 108 MHz...
  • Page 9 Si4822/26-DEMO 4. Operation The Si4822/26-DEMO board, a complete analog tune and digital display radio, provides two major modes of operation: Time mode and FM/AM/SW Radio mode. 4.1. Time Mode Place two AAA batteries into the battery compartment. The board will automatically enter Time mode and display the time.
  • Page 10 Si4822/26-DEMO 4.2. FM/AM/SW Radio Mode In time mode, the device will enter FM/AM/SW mode after a long press (hold time > 1s) of the POWER/BAND button or when the alarm time is reached. The LCD displays the following information: band indicator, band frequency indicator, and sleep indicator in case the radio is automatically turned on by the alarm.
  • Page 11 Si4822/26-DEMO 4.2.1. MCU Setting Band Property The demo board provides the function that the band property can be set by the MCU. The band property includes:  Band top  Band bottom  De-emphasis (only for FM)  Channel Space (only for AM) The setting menu is illustrated in Figure 4.
  • Page 12 Si4822/26-DEMO 4.2.2. MCU Setting Radio Working Mode The host MCU can set the radio working mode. The working mode includes:  Tone/volume mode (only for FM mode), item 3 in setting menu  Tuning preference (only for FM and SW), item 4 in setting menu To set radio working mode, follow these steps: 1.
  • Page 13 Si4822/26-DEMO 5. Bill of Materials  ATDD AM/FM/SW receiver IC Si4822/26 with external 32.768 kHz crystal oscillator support  LM4910MA Audio amplifier IC  TM8795 MCU  See Table 3 for details Table 3. Si4822/26-DEMO Board Bill of Materials Rev 1.0 Item Reference Description...
  • Page 14 Si4822/26-DEMO Table 3. Si4822/26-DEMO Board Bill of Materials Rev 1.0 (Continued) Item Reference Description Value R9-12 R14-15 R28 R33 R35 RES,SM,0603,Tolerance ±1% 20 k 1% RES,SM,0603,Tolerance ±1% 30 k 1% RES,SM,0603,Tolerance ±1% 33 k 1% RES,SM,0603,Tolerance ±1% 40 k 1% RES,SM,0603,Tolerance ±1% 47 k 1% SI4822/26 SSOP24...
  • Page 15 Si4822/26-DEMO 6. Schematics and Gerber Rev. 0.1...
  • Page 16 Si4822/26-DEMO Rev. 0.1...
  • Page 17 Si4822/26-DEMO Rev. 0.1...
  • Page 18 The products must not be used within any Life Support System without the specific written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death.
  • Page 19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Silicon Laboratories Si4826-DEMO...

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