EVB71112 Melexis Company, EVB71112 Datasheet
EVB71112
Related parts for EVB71112
EVB71112 Summary of contents
Page 1
... RSSI allows signal strength indication and ASK detection Ordering Information Part No. EVB71112-868-FSK-C EVB71112-868-ASK-C * EVB71112-XXX-YYY-C with XXX = Reception frequency (868.3MHz or 915MHz) and YYY = Modulation (FSK or ASK). ** The evaluation board is supplied with a SMA connector. Application Examples Tire Pressure Monitoring Systems (TPMS) Remote Keyless Entry (RKE) ...
Page 2
... Circuit Diagram for ASK Reception ............................................................................................. 9 2.2.2 Board Component Values for ASK ............................................................................................ 10 2.2.3 Component Arrangement Top Side for ASK Reception ............................................................ 11 3 Evaluation Board Layouts .......................................................................................12 4 Package Description ................................................................................................13 4.1 Soldering Information ..................................................................................................... 13 5 Disclaimer .................................................................................................................14 39012 71112 01 Rev. 012 868/915MHz Receiver Evaluation Board Description Page EVB71112 EVB Description April/08 ...
Page 3
... Input frequency acceptance range ±100 kHz RSSI range FSK deviation range: ±2.5 kHz to ±80 kHz , 180 kHz IF filter BW, incl SAW front-end-filter loss , ± 20 kHz FSK deviation, 180 kHz IF filter BW, incl SAW front-end- Page EVB71112 868/915MHz Receiver 0 dBm @ FSK EVB Description April/08 ...
Page 4
... MIX2 IF2 IF1 IFA LO2 DIV2 PFD Fig. 1: TH71112 block diagram Mode RX standby RX active Mode LOW GAIN Page EVB71112 868/915MHz Receiver OUTP MIX3 23 OUTN 24 OAP 20 OA OAN 19 OUT_OA 18 BIAS Description RX disabled RX enable ...
Page 5
... MHz to 930 MHz (because 68.825 this is the optimum frequency range of the 58.125 VCO1). Furthermore the first IF should be as high as possible to achieve highest RF image 10.7 rejection. Page EVB71112 868/915MHz Receiver low-high (RF + IF2)/34 32•REF RF – LO1 2•REF LO2 – IF1 RF = ...
Page 6
... RO 27 VCC CB2 28 ENRX TH71112 VEE IN_LNA VCC CB1 C7 L3 CB8 VCC Page EVB71112 868/915MHz Receiver FSK output 1 2 CB3 VCC CERDIS 16 C12 OUT_IFA 15 VCC VCC 14 CB4 C11 FBC2 13 C9 FBC1 12 C10 R2 IN_IFA 11 VEE 10 OUT_MIX2 9 ...
Page 7
... MHz 3dB (f = 915 MHz 180 kHz 3dB Page EVB71112 868/915MHz Receiver Description crystal series capacitor loop filter capacitor capacitor to match SAW filter input capacitor to match SAW filter output MIX1 input matching capacitor IF1 tank capacitor IFA feedback capacitor ...
Page 8
... Board size is 42.7mm x 37.5mm Melexis RF_input IN_LNA EVB711XX_4 39012 71112 01 Rev. 012 Evaluation Board Description 1 C15 R5 XTAL CB2 TH71112 CB1 L3 CB8 Page EVB71112 868/915MHz Receiver 1 1 C16 R4 0Ω C17 CB3 17 16 C10 9 8 CB5 C7 C8 VCC EVB Description April/08 ...
Page 9
... RO 27 VCC CB2 28 ENRX TH71112 VEE IN_LNA VCC CB1 C7 L3 CB8 VCC Page EVB71112 868/915MHz Receiver ASK output 1 2 CB3 VCC 16 OUT_IFA 15 VCC VCC 14 CB4 C11 FBC2 FBC1 C10 R2 IN_IFA 11 VEE 10 OUT_MIX2 9 CERFIL ...
Page 10
... MHz 3dB (f = 915 MHz 180 kHz 3dB Page EVB71112 868/915MHz Receiver Description crystal series capacitor loop filter capacitor capacitor to match SAW filter input capacitor to match SAW filter output MIX1 input matching capacitor IF1 tank capacitor IFA feedback capacitor ...
Page 11
... Board size is 42.7mm x 37.5mm Melexis RF_input IN_LNA EVB711XX_4 39012 71112 01 Rev. 012 Evaluation Board Description XTAL CB2 TH71112 CB1 L3 CB8 Page EVB71112 868/915MHz Receiver 1 1 C16 C17 0Ω CB3 17 16 C10 9 8 CB5 C7 C8 VCC EVB Description April/08 ...
Page 12
... Evaluation Board Layouts Board layout data in Gerber format is available, board size is 37.5mm x 42.7mm. OUT_OA RSSI OUTP OUTN RO ENRX PCB top view 39012 71112 01 Rev. 012 868/915MHz Receiver Evaluation Board Description PCB bottom view Page EVB71112 EVB Description April/08 ...
Page 13
... L 1° LQFP32 (Low profile Quad Flat Package 1.40 0.05 1.35 0.8 1.60 0.15 1.45 0.055 0.002 0.053 0.031 0.063 0.006 0.057 Page EVB71112 868/915MHz Receiver 1° 0.25 (0.0098) .10 (.004) α 0.30 0.09 0.45 0° 0.45 0.20 0.75 7° 0.012 0.0035 0.018 0° 0.018 ...
Page 14
... Europe, Africa: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com 39012 71112 01 Rev. 012 Evaluation Board Description www.melexis.com Americas: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified Page EVB71112 868/915MHz Receiver Asia: Phone: +32 1367 0495 E-mail: sales_asia@melexis.com EVB Description April/08 ...