SBOS531E August   2010  – June 2019 AFE031

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
  4. 4 Revision History
  5. 5 Description, continued
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Thermal Information
    4. 8.4  Electrical Characteristics: Transmitter (Tx)
    5. 8.5  Electrical Characteristics: Power Amplifier (PA)
    6. 8.6  Electrical Characteristics: Receiver (Rx)
    7. 8.7  Electrical Characteristics: Digital
    8. 8.8  Electrical Characteristics: Two-Wire Interface
    9. 8.9  Electrical Characteristics: Internal Bias Generator
    10. 8.10 Electrical Characteristics: Power Supply
    11. 8.11 Timing Requirements
    12. 8.12 Timing Diagrams
    13. 8.13 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Functional Block Diagram
    2. 9.2 Feature Description
      1. 9.2.1 PA Block
      2. 9.2.2 Tx Block
      3. 9.2.3 Rx Block
      4. 9.2.4 DAC Block
      5. 9.2.5 REF1 and REF2 Blocks
      6. 9.2.6 Zero Crossing Detector Block
      7. 9.2.7 ETx and ERx Blocks
    3. 9.3 Power Supplies
    4. 9.4 Pin Descriptions
      1. 9.4.1 Current Overload
      2. 9.4.2 Thermal Overload
    5. 9.5 Calibration Modes
      1. 9.5.1 Tx Calibration Mode
      2. 9.5.2 Rx Calibration Mode
    6. 9.6 Serial Interface
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Detailed Design Procedure
        1. 10.2.1.1 Line-Coupling Circuit
        2. 10.2.1.2 Circuit Protection
        3. 10.2.1.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Powerline Communications Developer’s Kit
        2. 11.1.2.2 TINA-TI™ (Free Software Download)
        3. 11.1.2.3 TI Precision Designs
        4. 11.1.2.4 WEBENCH Filter Designer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.7 ETx and ERx Blocks

The AFE031 contains a two-wire transmitter block, ETx, and a two-wire receiver block, ERx. These blocks support communications that use amplitude shift keying (ASK) with on-off keying (OOK) modulation.

The ETx block is a gated driver that allows for transmission of a carrier input signal and modulating input signal. For typical applications, a 50-kHz square wave carrier signal is applied to E_Tx_Clk while the modulating signal is applied to E_Tx_In. The output (E_Tx_Out) is then in a high-impedance state when E_Tx_In is '1'. Figure 41 shows the relationship between E_Tx_Clk, E_Tx_In, and E_Tx_Out.

AFE031 ai_tc_two_wire_waves_bos531.gifFigure 41. ETx Block Transfer Function

The ERx Block consists of a low-pass analog filter configured in an inverting gain of –4.5 db. This block, along with an external capacitor, can be used to create a passband filter response as shown in Figure 42.

AFE031 ai_tc_two_wire_bpf_resp_bos531.gifFigure 42. ERx Block Frequency Response

The E_Rx_Out pin can be directly connected to either an available analog-to-digital converter (ADC) input or GPIO on the host microcontroller. Figure 43 illustrates a typical two-wire application for ETx and ERx.

AFE031 ai_two_wire_app_bos531.gifFigure 43. Typical Two-Wire Application for ETx and ERx