Silicon Laboratories Si4311-DB Bedienungsanleitung

Si4311-DB

Si4311 DEMO BOARD USER’SGUIDE

1. Overview

The Silicon Laboratories Si4311-DEMO board provides a complete FSK radio design with numerous selectable

features that demonstrate the capabilities of the Silicon Laboratories Si4311 FSK receiver. The Si4311-DEMO

board can be configured to receive FSK data from an SMA connector or wirelessly with an onboard printed circuit

board (PCB) antenna. The demodulated output data from the Si4311-DEMO board can be measured via an SMA

connector and/or observed with an LED and/or heard with an audio buzzer. The system is powered by a 9 V

battery or an external 3.3 V power supply.

2. Features

Single chip FSK receiver

Selectable 315/433.92 MHz carrier frequency

Selectable data rate, frequency deviation

3. Description

Figures 1 and 2 show the physical layout of the board with key components indicated.

Figure 1. Si4311 DEMO Board Top Side

Si4311-DB

2 Rev. 0.3

Figure 2. Si4311 DEMO Board Bottom Side with 9 V Battery

Power Supply Connector

J1: Jumper to select external 3.3 V supply. This is a solderable jumper and should be shorted when used.

J7: External 3.3 V supply connector: +3.3 V with the jumper on the right side and GND on the left side.

J3: 9 V battery supply connector: Power on with the jumper on the right side and power off with the jumper on the

left side.

J8: Jumper used to measure Si4311 current consumption.

Jumper connected (shorted) is normal operation.

Jumper connected with an ammeter in series to measure current.

D3: Power-on indicator. LED lights up when powered on.

RF Input

J4: SMA connector for an external RF input. Ensure inductor L3 is open to remove the PCB antenna when using

the SMA input.

Demodulated Data Output

J5: SMA connector for demodulated data output.

External Clock Driver

J9/J17: These solder jumpers should be shorted when an external clock driver is used.

J10: External clock connection point.

Automatic Frequency Centering (AFC)

J11: Jumper used to select AFC function.

Logic High (left side connection) to enable AFC.

Logic Low (right side connection) to disable AFC.

Carrier Frequency Selection

J12: Jumper used to select 315 or 433.92 MHz carrier frequency.

Logic High (left side connection) for 315 MHz.

Logic Low (right side connection) for 433.92 MHz.

Si4311-DB

Rev. 0.3 3

Bit Time Selection

J13/J14: Two jumpers used for bit time selection.

Frequency Deviation Selection

J15/J16: Two jumpers used for frequency deviation selection.

Key Components

U4: Si4311 single chip FSK receiver.

X1: 16 MHz crystal.

D1: LED lights up when data output present.

B2: Audio buzzer sounds when data output is present.

Table 1. Bit Time Selection

J13 J14 Bit Time [µs]

0 0 1000

01 500

10 200

11 100

Table 2. Frequency Deviation Selection

J13 J14 Frequency Deviation [kHz]

00 30

01 50

10 70

11 90

Si4311-DB

4 Rev. 0.3

4. Schematic

Figure 3. Si4311-DEMO Schematic

Si4311-DB

Rev. 0.3 5

5. PCB Layout

Figure 4. Si4311 PCB Top Layer

Figure 5. Si4311 PCB Bottom Layer

Si4311-DB

6 Rev. 0.3

Figure 6. Si4311 PCB Top Silkscreen

Figure 7. Si4311 PCB Bottom Silkscreen

Si4311-DB

Rev. 0.3 7

6. Bill of Materials

Reference Qty Package Value

B1 1 AA_BATTERY 9.0 V

B2 1 BUZZER2

C1,C7 2 CMS0402 22 nF

C2 1 CMS0603 15 pF

C3,C4 2 CMS0603 NC

C5,C9 2 CMS0402 1 µF

C6 1 CMS0402 NC

C8 1 CMS0402 0.1 µF

C10 1 CMS0402 10 nF

C11 1 CMS0603 2.2 µF

C13 1 CMS0402 220 pF

C14 1 CMS0603 TBD

D1,D3 2 CMS0805 LED

D2 1 CMS0805 IN4148

J3 1 DIP SWITCH

J4,J5 2 SMA

J7 1 HEADER2

L1 1 CMS0402 33 nH

L2 1 CMS0402 TBD

L3 1 CMS0402 0R/NC

Q1 1 SOT23 9013

R1 1 CMS0603 0R

R2 1 CMS0402 20 k

R3,R6 2 CMS0402 1 k

R4 1 CMS0402 330R

R5 1 CMS0402 10 k

R7 1 CMS0402 0R

R8 1 CMS0402 39R

R9 1 CMS0603 NC

U1 1 SOT-23-5 LP2985

U2 1 SC33 SAW filter

U3 1 ANT

U4 1 MLP20-3MM Si4311

X1 1 XTAL_32X25 16 MHz

Si4311-DB

8 Rev. 0.3

7. Receiving Data Status

8. References

Si4311 Data Sheet

Si4311-DB

Rev. 0.3 9

NOTES:

Si4311-DB

10 Rev. 0.3

CONTACT INFORMATION

Silicon Laboratories Inc.

400 West Cesar Chavez

Austin, TX 78701

Tel: 1+(512) 416-8500

Fax: 1+(512) 416-9669

Toll Free: 1+(877) 444-3032

Please visit the Silicon Labs Technical Support web page:

https://www.silabs.com/support/pages/contacttechnicalsupport.aspx

and register to submit a technical support request.

Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.

Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from

theuseofinformationincludedherein.Additionally, Silicon Laboratories assumes no responsibility forthefunctioningofundescribed features

or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, rep-

resentation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation conse-

quential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to

support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per-

sonal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap-

plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.

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