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rev. 0.3 9/09 copyright ? 2009 by silicon laboratories SI4312-DB SI4312-DB si4312 d emo b oard u ser ? s g uide 1. overview the silicon laboratories si4312-demo board pr ovides a complete ook radio de sign with numerous selectable features that demonstrate the cap abilities of the silicon laboratories si4312 ook receiv er. the si4312-demo board can be configured to receive ook data from an sma connector or wirelessly wit h 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
SI4312-DB 2 rev. 0.3 figure 2. si4312 demo board bott om 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 righ t 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 shor ted 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.
SI4312-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: 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. table 1. bit time selection j13 j14 bit time [s] 0 0 1000 01 500 10 200 11 100 table 2. frequency deviation selection j13 j14 threshold hold time [ms] 00 70 01 100 10 300 11 700
SI4312-DB 4 rev. 0.3 4. schematic figure 3. si4312-demo schematic
SI4312-DB rev. 0.3 5 5. pcb layout figure 4. si4312 pcb top layer figure 5. si4312 pcb bottom layer
SI4312-DB 6 rev. 0.3 figure 6. si4312 pcb top silkscreen figure 7. si4312 pcb bottom silkscreen
SI4312-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 f c6 1 cms0402 nc c8 1 cms0402 0.1 f c10 1 cms0402 10 nf c11 1 cms0603 2.2 f 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
SI4312-DB 8 rev. 0.3 7. receiving data status 8. references ? si4312 data sheet
SI4312-DB rev. 0.3 9 n otes :
SI4312-DB 10 rev. 0.3 c ontact i nformation 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 publ ication but is subject to change without notice. silicon laboratories assumes no responsibility for errors and om issions, and disclaims responsibi lity for any consequences resu lting from the use of information included herein. ad ditionally, silicon laboratorie s assumes no responsibility for the functioning of und escribed features or parameters. silicon laboratories reserves the right to make changes without further notice . silicon laboratories makes no wa rranty, rep- resentation or guarantee regarding the suitability of its products for any particular purpose, nor does silicon laboratories as sume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including wi thout limitation conse- quential or incidental damages. silicon laborat ories 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 t he silicon laboratories product could create a s ituation where per- sonal injury or death may occur. should buyer purchase or us e silicon laboratories products for any such unintended or unauthor ized ap- plication, buyer shall indemnify and hold silicon laboratories harmles s against all claims and damages.
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