Si4312-DB Si4312 D EMO B OARD U SER ’ S G U ID E 1. Overview The Silicon Laboratories Si4312-DEMO board provides a complete OOK radio design with numerous selectable features that demonstrate the capabilities of the Silicon Laboratories Si4312 OOK receiver. The Si4312-DEMO board can be configured to receive OOK data from an SMA connector or wirelessly with an on-board printed circuit board (PCB) antenna. The demodulated output data from the Si4312-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 OOK receiver Selectable 315/433.92 MHz carrier frequency Selectable data rate, threshold hold time 3. Description Figures 1 and 2 show the physical layout of the board with key components indicated. Figure 1. Si4312 DEMO Board Top Side Rev. 0.3 9/09 Copyright © 2009 by Silicon Laboratories Si4312-DB Si4312-DB Figure 2. Si4312 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. Ratio Setting J11: Jumper used to select ratio setting. Logic High (left side connection) for ratio = 10. Logic Low (right side connection) for ratio = 5. 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. 2 Rev. 0.3 Si4312-DB Bit Time Selection J13/J14: Two jumpers used for bit time selection. Table 1. Bit Time Selection J13 J14 Bit Time [µs] 0 0 1000 0 1 500 1 0 200 1 1 100 Frequency Deviation Selection J15/J16: Two jumpers used for frequency deviation selection. Table 2. Frequency Deviation Selection J13 J14 Threshold Hold Time [ms] 0 0 70 0 1 100 1 0 300 1 1 700 Key Components U4: Si4312 single chip OOK receiver. X1: 16 MHz crystal. D1: LED lights up when data output present. B2: Audio buzzer sounds when data output is present. Rev. 0.3 3 Si4312-DB 4. Schematic Figure 3. Si4312-DEMO Schematic 4 Rev. 0.3 Si4312-DB 5. PCB Layout Figure 4. Si4312 PCB Top Layer Figure 5. Si4312 PCB Bottom Layer Rev. 0.3 5 Si4312-DB Figure 6. Si4312 PCB Top Silkscreen Figure 7. Si4312 PCB Bottom Silkscreen 6 Rev. 0.3 Si4312-DB 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 Si4312 X1 1 XTAL_32X25 16 MHz Rev. 0.3 7 Si4312-DB 7. Receiving Data Status 8. References 8 Si4312 Data Sheet Rev. 0.3 Si4312-DB NOTES: Rev. 0.3 9 Si4312-DB 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. 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 the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. 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Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. 10 Rev. 0.3 Mouser Electronics Related Product Links 634-4312-DK1 - Silicon Laboratories 4312-DK1