EVB71121 Melexis Company, EVB71121 Datasheet

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EVB71121

Manufacturer Part Number
EVB71121
Description
Evaluation Board For Mlx71121
Manufacturer
Melexis Company
Datasheet
Features
! Dual RF input for antenna space and frequency diversity, LNA cascading or differential feeding
! Fully integrated PLL-based synthesizer
! 2
! Reception of ASK or FSK modulated signals
! Wide operating voltage and temperature ranges
! Very low standby current consumption
! Low operating current consumption
! Internal IF filter
! Internal FSK demodulator
! Average or peak detection data slicer mode
! RSSI output with high dynamic range for RF level indication
! Output noise cancellation filter
! MCU clock output
! High over-all frequency accuracy
Ordering Information
Part No. (see paragraph 4)
EVB71121-315-C
EVB71121-433-C
Note 1: Peak detection mode is default population.
Application Examples
! General digital and analog RF receivers
! Tire pressure monitoring systems (TPMS)
! Remote keyless entry (RKE)
! Low power telemetry systems
! Alarm and security systems
! Active RFID tags
! Remote controls
! Garage door openers
! Home and building automation
General Description
The MLX71121 is a multi-band, single-channel RF receiver based on a double-conversion super-heterodyne
architecture. It can receive FSK and ASK modulated signals. The IC is designed for general purpose
applications for example in the European bands at 433MHz and 868MHz or for similar applications in North
America or Asia, e.g. at 315MHz or 915MHz.
The receiver’s extended temperature and supply voltage ranges make the device a perfect fit for automotive
or similar applications where harsh environmental conditions are expected.
39012 71121 01
Rev. 003
at 300 to 930MHz
nd
mixer with image rejection
Page 1 of 18
Evaluation Board Description
EVB71121-868-C
EVB71121-915-C
300 to 930MHz Receiver
EVB71121
EVB Description
Jan/08

Related parts for EVB71121

EVB71121 Summary of contents

Page 1

... The receiver’s extended temperature and supply voltage ranges make the device a perfect fit for automotive or similar applications where harsh environmental conditions are expected. 39012 71121 01 Rev. 003 300 to 930MHz Receiver Evaluation Board Description EVB71121-868-C EVB71121-915-C Page EVB71121 EVB Description Jan/08 ...

Page 2

... Component List for Antenna Space Diversity ................................................................. 13 3.4 PCB Layouts for Antenna Space Diversity ..................................................................... 14 4 Board Variants..........................................................................................................14 5 Package Description ................................................................................................15 5.1 Soldering Information ..................................................................................................... 15 6 Reliability Information .............................................................................................16 7 ESD Precautions ......................................................................................................16 8 Disclaimer .................................................................................................................18 39012 71121 01 Rev. 003 300 to 930MHz Receiver Evaluation Board Description Page EVB71121 EVB Description Jan/08 ...

Page 3

... Maximum data rate: 50kps RZ (bi-phase) code, 100kps NRZ ! Spurious emission: < -54dBm ! Linear RSSI range: > 60dB ! Crystal reference frequency 27MHz ! MCU clock frequency: 2.0 to 3.4MHz -3 315 MHz 433 MHz -107dBm -107dBm -112dBm -112dBm Page EVB71121 868 MHz 915 MHz -104dBm -102dBm -108dBm -105dBm EVB Description Jan/08 ...

Page 4

... IFF MIX2 IFA LO2 N1 N2 PFD counter counter VCO Fig. 1: MLX71121 block diagram Page EVB71121 300 to 930MHz Receiver 100k 100k DFO OA1 ASK 18 FSK SW1 PKDET+ 20 PDP FSK DEMOD PKDET _ PDN SW2 DTAO OA2 ...

Page 5

... Input frequency range 300 to 470MHz Input frequency range 610 to 930MHz Description LNA1 active, LNA2 shutdown LNA1 and LNA2 active LNA1 shutdown, LNA2 active /2 in this case). CC Description ASK demodulation FSK demodulation Description Averaging detection mode Peak detection mode Page EVB71121 EVB Description Jan/08 ...

Page 6

... In the example of Fig. 2, the image signals (high-high) and f RF (high-high LO2 LO1 . RO ⋅ LO2 Page EVB71121 300 to 930MHz Receiver (low-high) and f (low-low (high-low) are entering the second RF f LO2 ⋅ LO2 2 RO ...

Page 7

... IF2 1 RF IF2 + counter settings, above equations can be transferred into LO1 + 4(f 1.8MHz ) 2(f 1.8MHz ) RF 3 Page EVB71121 300 to 930MHz Receiver LO2 IF2 RF − − ...

Page 8

... IF1 LO1 107.40 422.40 147.04 580.96 288.23 580.07 303.80 611.20 f [MHz] f [MHz] IF1 LO1 146.82 580.07 288.23 580.07 Page EVB71121 300 to 930MHz Receiver f [MHz] f [MHz] LO2 RO 105.60 17.600000 145.24 24.206667 290.03 24.169444 305.60 25.466667 f [MHz] f [MHz] LO2 RO 145.02 24.169444 290 ...

Page 9

... PDP 32L QFN 5x5 6 LNAO2 SLC DFO 7 VEE LNAI2 DF1 CF2 CB1 Fig. 3: Circuit schematic Page EVB71121 300 to 930MHz Receiver RSSI 7 8 XTAL Ω 0 jumper pads CX CRS 24 23 CF3 22 21 CB2 CP2 20 CP1 19 VCC 18 CF1 17 ...

Page 10

... Component Arrangement Top Side (Peak Detection Data Slicer) 39012 71121 01 Rev. 003 Evaluation Board Description Fig. 4: PCB top-side view Page EVB71121 300 to 930MHz Receiver EVB Description Jan/08 ...

Page 11

... PDP 32L QFN 5x5 6 LNAO2 SLC 7 VEE DFO LNAI2 DF1 CF2 CB1 Fig. 5: Circuit schematic Page EVB71121 300 to 930MHz Receiver RSSI 7 8 XTAL Ω 0 jumper pads CX CRS 24 23 CF3 22 21 CB2 20 CSL 19 VCC 18 CF1 17 CB0 ...

Page 12

... Component Arrangement Top Side (Averaging Data Slicer) 39012 71121 01 Rev. 003 Evaluation Board Description Fig. 6: PCB top-side view Page EVB71121 300 to 930MHz Receiver EVB Description Jan/08 ...

Page 13

... SAFCC915M SL0X00 AL0N00 (868.3 MHz) (915 MHz) 24.169444 25.46667 MHz MHz MHz Page EVB71121 300 to 930MHz Receiver Tol. Description ±5% LNA input filtering capacitor ±5% LNA output tank capacitor ±5% MIX1 positive input matching capacitor ±5% MIX1 negative input matching capacitor ± ...

Page 14

... Note: available EVB setups 39012 71121 01 Rev. 003 Evaluation Board Description PCB bottom view Modulation according to section 3.1 / 3.2 –FSK according to section 3.1 / 3.2 –ASK –FM Page EVB71121 300 to 930MHz Receiver Board Execution antenna version –A connector version –C EVB Description Jan/08 ...

Page 15

... should not be connected to the PCB. Fig 5: 32L QFN 5x5 Quad 3.00 3.00 0.80 0 3.25 3.25 1.00 0.05 0.118 0.118 0.0315 0 0.128 0.128 0.0393 0.002 Page EVB71121 300 to 930MHz Receiver 0.3 0.18 0.20 0.50 0.5 0.30 0.0118 0.0071 0.0079 0.0197 0.0197 0.0118 EVB Description Jan/08 ...

Page 16

... Use of Certain Hazardous Substances) please visit the quality page on our website: http://www.melexis.com/quality_leadfree.aspx 7 ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 39012 71121 01 Rev. 003 300 to 930MHz Receiver Evaluation Board Description Page EVB71121 EVB Description Jan/08 ...

Page 17

... Your Notes 39012 71121 01 Rev. 003 300 to 930MHz Receiver Evaluation Board Description Page EVB71121 EVB Description Jan/08 ...

Page 18

... Europe, Africa: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com 39012 71121 01 Rev. 003 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 EVB71121 300 to 930MHz Receiver Asia: Phone: +32 1367 0495 E-mail: sales_asia@melexis.com EVB Description Jan/08 ...

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