reliable connectivity for iot devices · global ism band landscape solving rf challenges with...

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  • MICHAEL DALTON

    Product Marketing

    Reliable Connectivity for IoT Devices

    102/22/2017

  • Agenda

    2

    ►IoT Connectivity Battery Powered IoT Applications

    Connectivity Requirements

    Global ISM band landscape

    ►Solving RF challenges with Robust Radio

    Design Congested ISM bands

    Range

    Operating environment effects – temperature

    changes

    Component ageing effects

  • Battery Powered IoT Applications

    3

    Healthcare

    Energy Industry 4.0

    Smart City Smart Agriculture

    Connected Building

  • Broad Range of Application Requirements

    4

    ►Data requirements

    ►Number of connected nodes

    ►Geographic spacing of nodes

    ►Mission critical – How important is your data?

    Mesh Star

    • 2.4 GHz

    • Sub-GHz ISM band

    • Sub-GHz licensed bands

    • Cellular bands

  • Global ISM Bands

    5

    169/433/868 MHz

    315/915 MHz

    433/915 MHz

    315/915 MHz

    426/429/920 MHz

    865 MHz

    2.4 GHz

  • IoT Connectivity Challenges

    6

    Congested ISM Bands

    Seasonal VariationFederal

    Communications

    Commission

    Compliance limits

    1km

    2km

    4km

    Long Range

  • Congested ISM Bands

    In-Band Interferers

    7

    Machine Health Monitor Humidity Sensor

    Noise Floor

    ISM BandCellular Band

    Access Point

  • Congested ISM Bands

    Adjacent Channel Rejection Spec (ACR)

    ►How to reject nearby interferers?

    Accurate filtering and high quality receiver signal

    chain design

    ►What is the datasheet specification for

    measuring this?

    Adjacent Channel Rejection (ACR)

    *ADF7030-1 High Performance Transceiver

    8

    ISM BandCellular Band

    Noise Floor

    -70dBm

    -115dBm

    ACR = 45dB

  • Congested ISM Bands

    Out of Band Interferers

    9

    ISM BandCellular Band

    Noise Floor

    Machine Health Monitor

    Access Point

  • Congested ISM Bands

    Blocking Spec

    ►How to reject out of band interferers?

    Additional filtering and high performance phase

    noise

    ►What is the datasheet specification for

    measuring this?

    Blocking

    *ADF7030-1 High Performance Transceiver

    10

    ISM BandCellular Band

    Noise Floor

    -25dBm

    -115dBm

    Blocking = 90dB at 10MHz offset

    10MHz offset

  • Congested ISM Bands

    Blocking Spec

    11

    ISM BandCellular Band

    Noise Floor

    -25dBm

    -115dBm

    Blocking = 90dB at 10MHz offset

    10MHz offset

    ►Another indicator of good blocking

    performance

    Phase Noise

    *ADF7030-1 High Performance Transceiver

    -154dBc/Hz at 10MHz offset

  • Congested ISM Bands

    Real Life Scenario

    12

    Access Point

    High Performance Radio Receiver Design Critical for Link Robustness in presence of Interferers

  • Long Range

    Sensitivity

    ► Sensitivity

    A measure of how low a signal a radio can receive

    radio

    As data rate decreases, weaker signals can be

    detected

    ►Datasheet shown as Packet Error Rate (PER) or

    Bit Error Rate (BER) level

    13

    1km

    2km

    4km

  • Long Range

    Sensitivity stability over frequency error

    ►Temperature and ageing effects can cause

    frequency error between transmitter and

    receiver

    14

    Ensure Sensitivity remains constant over define frequency error range

  • Output Power Stability

    Temperature effects

    ►PA circuits susceptible to temp changes

    ►Transmit Power can change with temperature

    15

  • Output Power Stability

    Temperature effects

    16

    1km

    2km

    4km

  • Output Power Stability

    Temperature effects

    17

    Federal

    Communications

    Commission

  • ►Datasheet Spec

    Ensure PA output power is stable over

    temperature

    Output Power Stability

    Temperature effects

    18

    Ensure radio is designed for stability in real life conditions

    *ADF7030-1 High Performance Transceiver

  • Conclusion

    ►Reliable connectivity will be key for mass adoption of low power connected

    sensors

    ►Effects of environmental RF hazards can be resolved through radio

    performance

    Congested ISM Bands: ACR, Blocking

    Range: Sensitivity Stability

    Temperature effects: PA Stability

    ►Analog Devices ADF7030-1 provides robust connectivity through

    outstanding RF design

    19

  • Thank You For Watching!

    View Additional Webcasts at

    www.analog.com/Webcasts

    Ask Questions on EngineerZone

    ez.analog.com/Webcasts

    Search for ADI Parts on Avnet

    www.avnet.com

    20

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