Silicon Labs Si4820-24-DEMO User's Guide

Silicon Labs Si4820-24-DEMO  User's Guide
Si4820/24-DEMO
Si4820/24 D EMO B OA RD U SER ’ S G UIDE
1. Features
ATAD
(analog tune and analog display) AM/FM/SW radio
Worldwide FM band support from 64–109 MHz with 5 sub-bands:
FM1
87–108 MHz (Demo Board Default)
86.5–109 MHz
FM3 87.3–108.25 MHz
FM4 76–90 MHz
FM5 64–87 MHz (Demo Board Default)
FM2
Worldwide
AM band support from 504–1750 kHz with 5 sub-bands
AM1
520–1710 kHz (Demo Board Default)
522–1620 kHz (Demo Board Default)
AM3 504–1665 kHz
AM4 520–1730 kHz
AM5 510–1750 kHz
AM2
Worldwide
SW band support from 5.6–22 MHz with 16 sub-bands:
SW1
5.6–6.4 MHz (DEMO Board Default, for Si4824 only)
SW2 5.95–6.2 MHz
SW3 6.8–7.6 MHz (DEMO Board Default, for Si4824 only)
SW4 7.1–7.6 MHz
SW5 9.2–10 MHz (DEMO Board Default, for Si4824 only)
SW6 9.2–9.9 MHz
SW7 11.45–12.25 MHz(DEMO Board Default, for Si4824 only)
SW8 11.6–12.2 MHz
SW9 13.4–14.2 MHz (DEMO Board Default, for Si4824 only)
SW10 13.57–13.87 MHz
SW11 15–15.9 MHz (DEMO Board Default, for Si4824 only)
SW12 15.1–15.8 MHz
SW13 17.1–18 MHz (DEMO Board Default, for Si4824 only)
SW14 17.48–17.9 MHz
SW15 21.2–22 MHz (DEMO Board Default, for Si4824 only)
SW16 21.45–21.85 MHz
Twelve
positions band switch for selecting different band according to the target market.
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
2. Overview
This manual describes the operation of the Silicon Labs Si4820/24-DEMO board Rev1.0, Sep 02, 2011. The
Silicon Laboratories Si4820/24-DEMO board is designed with the 24-pin SSOP packaged Si4820/24 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. It provides a complete portable
analog tune analog display AM/FM/SW radio design. The Si4820/24-DEMO is designed with 1-layer PCB, allowing
the lowest cost without sacrificing the RF performance. The demo board works with two AAA batteries and working
voltage down to 2.0 V.
Rev. 0.1 10/11
Copyright © 2016 by Silicon Laboratories
Si4820/24-DEMO
Si4820/24-DEMO
3. Description
Figure 1 and Figure 2 shows the physical layout of the board with key components indicated.
Figure 1. Si4820/24-DEMO Board Top Side
Figure 2. Si4820/24-DEMO Board Bottom Side
2
Rev. 0.1
Si4820/24-DEMO
Power:
BAT1: 2 cells AAA battery holder
S1: Power on / off
Audio Connectors:
J5: Mono audio headphone output
Antenna Selections:
AM antenna: Ferrite stick antenna for AM
J1: BNC connector for FM/ SW conductive testing or FM whip antenna
J2: FM antenna selector
1
2
3
1-2: HP ANT (J5)
2-3: BNC (J1)
J6: SMA connector for AM conductive testing
J3: AM antenna selector
1
2
3
1-2: AM Ferrite Antenna
2-3: SMA for AM Conductive Test (J6)
Audio Output Test Point:
For the general specification test, TP3 is the recommended audio signal test point. The audio test instrument
should be connected to 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.
1
GND
2
AOUT
Rev. 0.1
3
Si4820/24-DEMO
Main Components:
U1: Silicon Laboratories Si482x 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
S2: Band switch for FM, AM and SW
1
2
3
4
5
6
7
8
9
10
11
12
1: FM1 (87–108 MHz)
2: FM5 (64–87 MHz)
3: AM1 (520–1710 kHz)
4: AM2 (522–1620 kHz)
5:SW1 (5.6–6.4 MHz)
6:SW3 (6.8–7.6 MHz)
7:SW5 (9.2–10.0 MHz)
8:SW7 (11.45–12.25 MHz)
9:SW9 (13.4–14.2 MHz)
10:SW11 (15–15.9 MHz)
11:SW13 (17.1–18 MHz)
12:SW15 (21.2– 22 MHz)
4
Rev. 0.1
Si4820/24-DEMO
4. Operation
S4820/24-DEMO board, a complete analog tune and analog display radio, is very easy to operate:
1. Put two AAA batteries into the battery compartment.
2. Switch the power switch to the ON position. The board will power up to a radio band according to the
position of the band switch.
3. Change the band switch to the desired band.
4. Rotate the tuning wheel and find the desired frequency.
5. Rotate the volume control wheel or press the volume control push buttons to get a comfortable volume.
Note: For FM listening, the earphone cable must be connected to the board when J2 is set to "HP ANT" or an external antenna
must be connected to the BNC connector when J2 is set to "BNC".
For AM listening, the ferrite antenna must be connected to the board and the J3 is set to "Ferrite" before Turning on the
radio or band switching to AM.
For FM/AM sensitivity and SNR test, the tuner output volume level must be set to maximum by pressing push button S4,
or you might get degraded test results.
Rev. 0.1
5
Si4820/24-DEMO
5. Bill of Materials
ATAD
AM/FM/SW receiver IC Si4820/24 with external 32.768 kHz crystal oscillator support
LM4910 Audio amplifier IC
See Table 1 for details
Table 1. Si4820/24-DEMO Board Rev 1.0 Bill of Materials
Item
Qty
1
5
C1 C16 C19 C24 C39
CAP,SM,0603,X7R
0.1 µ
2
2
C23 C27
CAP,SM,1210,X7R
220 µ
3
1
C13
CAP,SM,1210,X7R
47 µ
4
2
C14 C25
Electrolytic capacitor
5
2
C2-3
CAP,SM,0603,C0G
22 p
6
2
C30-31
CAP,SM,0603,X7R
33 n
7
1
C33
CAP,SM,0603,C0G
10 p
8
1
C34
CAP,SM,0603,C0G
33 p
9
3
C4 C12 C15
CAP,SM,0603,X7R
4.7 µ
10
2
C5 C36
CAP,SM,0603,X7R
0.47 µ
11
2
C8 C10
CAP,SM,0603,C0G
100 p
12
1
C11
CAP,SM,0603,C0G
330 p
13
1
C18
CAP,SM,0603,X7R
820 p
14
1
R25
RES,SM,0603
0R
15
1
R22
RES,SM,0603
12 k
16
1
R27
RES,SM,0603
100R
17
1
R31
RES,SM,0603
1k
18
1
R32
RES,SM,0603
10R
19
1
R41
RES,SM,0603
120 k
20
1
R3
RES,SM,0603
2.2 k
21
1
R45
RES,SM,0603
200R
22
3
R6 R23 R34
RES,SM,0603
100 k
23
1
R20
RES,SM,0603
6.8 k
24
2
R37 R38
RES,SM,0603
56 k
25
1
R36
RES,SM,0603,Tolerance ±1%
33 k
26
1
R29
RES,SM,0603,Tolerance ±1%
160 k
27
1
R43
RES,SM,0603,Tolerance ±1%
30 k
28
1
R44
RES,SM,0603,Tolerance ±1%
47 k
29
1
R7
RES,SM,0603,Tolerance ±1%
10 k
6
Reference
Description
Rev. 0.1
Value
100 µ/4 V
Si4820/24-DEMO
Table 1. Si4820/24-DEMO Board Rev 1.0 Bill of Materials (Continued)
Item
Qty
Reference
Description
30
1
R8
RES,SM,0603,Tolerance ±1%
40 k
31
9
R9-12 R14-15 R28 R33 R35
RES,SM,0603,Tolerance ±1%
20 k
32
1
L1
RES,SM,0603
33
3
B4 B5 B6
FERRITE BEAD,SM,0603
2.5 k/100 M
34
1
B1
FERRITE BEAD,SM,0603
NP
35
1
VR1
100k,±10%,Variable resistor(POT)
100 k
36
1
VR2
10k,±20%,Variable resistor(POT)
10 k
37
1
U1
SI4820/24,SSOP24
38
1
U2
LM4910MA,SO8
39
2
D2 D4
DIODE,SM,ESD,SOT23
40
1
Q1
TRANSISTOR NPN SOT23
41
1
Y1
CRYSTAL
42
1
J1
BNC VERTICAL
BNC For FM/
SW testing
43
1
J6
SMA VERTICAL
SMA For AM testing
44
2
J2 J3
Single pole two throw switch
45
1
J5
earphone jack
46
1
S1
Two pole two throw switch
47
1
S2
Single pole twelve throw switch
48
1
S3
Push button
49
1
S4
Push button
50
1
ANT1
AW ferrite stick antenna
51
1
BAT1
BATTERY BOX ,AAA*2 SIZE
52
1
TP3
CONN,TH,1x2,HDR
Rev. 0.1
Value
0R
Si4820/24
LM4910MA
BAV99
2SC9018
32.768 kHz
220 µH
CONN,TH,1x2,HDR
7
2.5k/100M
B6
LNA_EN
[1]
R34
100k
33n
C30
R41
120k
C31
33n
R32
10R
C33
10p
VCC
Q1
2SC9018
R31
1k
J3
R37
56k
VCC
D2
BAV99
J6
R38
56k
C5
0.47u
J2
[1] FMI
VCC
RESET [1]
C19
0.1u
L1
0R/120nH
12
S4
D4
BAV99
11
MW
J1
100k
R6
C34
33p
9
RFGND
C36
0.47u
S3
C13
47u
C1
100R
R27
0.1u
VR1
100k 10%
C2
22p
32.768KHz
Y1
0.1u
C16
2
4.7u
C15
C3
22p
NC
VCC
volume-
6
8
FMI
10
AMI
GND
13
NC
GND
14
NC
RST
15
1
LNA_EN
[1] BAND
5
VOL17
VOL+
16
7
18
NC
4
XTAL0
19
NC
XTALI
3
BAND
VDD1
20
TUNE2
VDD2
21
TUNE1
DBYP
22
NC
23
AOUT
Rev. 0.1
U1
Si482x-B
TP1
[1] LNA_EN
[1] TUNE1
C4
R45
200R
RESET [1]
4u7
VR2-A
C39
0.1u
VCC
0R
R25
5
2
4
1
C14
100u/4V
3
6
4u7
C12
R3
2k2
820p
C18
12k
R22
4
3
2
1
C25
100u/6.3V
100k
R23
LM4910MA
GND
SHUTDOWN
IN2
IN1
U2
C11
R20
0.1u
C24
VDD
VO3
VO2
VO1
330p
6k8
5
6
7
8
220u
C27
100p
C10
220u
C23
TP3
GND
2k5/100M
100p
C8
B4 2k5/100M
B5
B1
NC
Aout
VCC
BAT1
VBAT
Figure 3. Si4820/24-DEMO Board Rev 1.0 Schematic
24
ANT1
MW ferrite antenna
volume+
VBAT
VCC
8
S1
FM/SW
1
2
3
[1] FMI
Audio output
J5
BAND [1]
1
S2
2
3
4
5
6
7
8
9
10
11
12
13
TUNE1 [1]
R44
47k 1%
R33
20k 1%
R29
160k 1%
20k 1%
R28
10k 1%
R7
40k 1%
R8
R9
20k 1%
R14
20k 1%
R11
20k 1%
R12
20k 1%
R10
20k 1%
R15
20k 1%
R35
20k 1%
R43
30k 1%
R36
33k 1%
FM1 (87MHz - 108MHz)
FM5 (64MHz - 87MHz)
AM1 (520kHz - 1710kHz)
AM2 (522kHz - 1620kHz)
SW1 (5.6MHz - 6.4MHz)
SW3(6.8MHz - 7.6MHz)
SW5(9.2MHz - 10.0MHz)
SW7(11.45MHz - 12.25MHz)
SW9 (13.4MHz - 14.2MHz)
SW11 (15MHz - 15.9MHz)
SW13 (17.1MHz - 18MHz)
SW15 (21.2MHz - 22MHz)
Si4820/24-DEMO
6. Schematics
Si4820/24-DEMO
Figure 4. Si4820/24-DEMO Board Gerber Rev 1.0
Rev. 0.1
9
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Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
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