SI4820-DEMO [SILICON]

Si4820/24 DEMO BOARD USERâS GUIDE;


型号：	SI4820-DEMO
厂家：	SILICON
描述：	Si4820/24 DEMO BOARD USERâS GUIDE
文件：	总10页 (文件大小：1229K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Si4820/24-DEMO

Si4820/24 DEMO BOARD USER’S GUIDE

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)

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 504–1750 kHz with 5 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 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

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

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: HP ANT (J5)

2-3: BNC (J1)

J6: SMA connector for AM conductive testing

J3: AM antenna selector

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.

GND

AOUT

Rev. 0.1

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

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)

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

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

Reference

Description

CAP,SM,0603,X7R

Value

0.1 µ

220 µ

47 µ

C1 C16 C19 C24 C39

C23 C27

C13

CAP,SM,1210,X7R

Electrolytic capacitor

CAP,SM,0603,C0G

CAP,SM,0603,X7R

CAP,SM,0603,C0G

CAP,SM,0603,X7R

CAP,SM,0603,C0G

CAP,SM,0603,X7R

RES,SM,0603

100 µ/4 V

22 p

C14 C25

C2-3

33 n

C30-31

C33

10 p

33 p

C34

4.7 µ

0.47 µ

100 p

330 p

820 p

C4 C12 C15

C5 C36

C8 C10

C11

C18

R25

12 k

R22

RES,SM,0603

100R

1 k

R27

RES,SM,0603

R31

RES,SM,0603

10R

R32

RES,SM,0603

120 k

2.2 k

200R

100 k

6.8 k

56 k

R41

RES,SM,0603

R45

RES,SM,0603

R6 R23 R34

R20

RES,SM,0603

R37 R38

R36

RES,SM,0603

33 k

RES,SM,0603,Tolerance ±1%

160 k

30 k

R29

R43

47 k

R44

10 k

Rev. 0.1

Si4820/24-DEMO

Table 1. Si4820/24-DEMO Board Rev 1.0 Bill of Materials (Continued)

Item

Qty

Reference

Description

Value

40 k

RES,SM,0603,Tolerance ±1%

RES,SM,0603

20 k

R9-12 R14-15 R28 R33 R35

2.5 k/100 M

B4 B5 B6

FERRITE BEAD,SM,0603

100k,±10%,Variable resistor(POT)

10k,±20%,Variable resistor(POT)

SI4820/24,SSOP24

100 k

VR1

VR2

10 k

Si4820/24

LM4910MA

BAV99

2SC9018

32.768 kHz

LM4910MA,SO8

D2 D4

DIODE,SM,ESD,SOT23

TRANSISTOR NPN SOT23

CRYSTAL

BNC For FM/

SW testing

BNC VERTICAL

SMA For AM testing

SMA VERTICAL

J2 J3

Single pole two throw switch

earphone jack

Two pole two throw switch

Single pole twelve throw switch

Push button

220 µH

ANT1

BAT1

TP3

AW ferrite stick antenna

BATTERY BOX ,AAA*2 SIZE

CONN,TH,1x2,HDR

Rev. 0.1

Si4820/24-DEMO

6. Schematics

N C

B 1

G N D

t u A o

V C C

T A V B

1 T B A

S 1

A - 2 V R

T A V B

V C C

E _ N L N A

T U A O

2 4

2 3

2 2

2 1

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

N C

P Y D B

D V D 2

1 E N T U

2 E N T U

D N B A

N C

D N B A

]

[ 1

D V D 1

I L A X T

0 L A X T

N C

F M

G F N

V O L

R S

N C

1 0

1 1

1 2

G N D

A M

V C C

+ e

m l u o v

S 4

- e m l u o v

S 3

Rev. 0.1

Si4820/24-DEMO

Figure 4. Si4820/24-DEMO Board Gerber Rev 1.0

Rev. 0.1

Smart.

Connected.

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Disclaimer

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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400 West Cesar Chavez

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http://www.silabs.com

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