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  • AFE79xx as Single Chip Wideband Repeater Solution

    • SBAA525A september   2021  – may 2023 AFE7900 , AFE7920 , AFE7950

       

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  • AFE79xx as Single Chip Wideband Repeater Solution
  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Highlighted Products
    2. 1.2 Device Loopback Modes
      1. 1.2.1 ADC to DAC JESD Loopback
      2. 1.2.2 ADC to DAC Low Latency Loopback
  5. 2Tests and Results
    1. 2.1 Test Methodology
      1. 2.1.1 Hardware Setup
        1. 2.1.1.1 ADC to DAC JESD Loopback
        2. 2.1.1.2 ADC to DAC Low Latency Loopback
      2. 2.1.2 GUI Setup
        1. 2.1.2.1 ADC to DAC JESD Loopback
        2. 2.1.2.2 ADC to DAC Low Latency Loopback
      3. 2.1.3 Test Conditions
      4. 2.1.4 Test Results
        1. 2.1.4.1 ADC to DAC JESD Loopback
          1. 2.1.4.1.1 JESD 122.88 MSPS
          2. 2.1.4.1.2 JESD 184.32 MSPS
          3. 2.1.4.1.3 JESD 245.76 MSPS
          4. 2.1.4.1.4 JESD 368.64 MSPS
          5. 2.1.4.1.5 JESD 491.52 MSPS
        2. 2.1.4.2 ADC to DAC Low Latency Loopback
  6. 3Conclusion
  7. 4References
  8. 5Revision History
  9. IMPORTANT NOTICE
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Application Note

AFE79xx as Single Chip Wideband Repeater Solution

Abstract

This application note explains loopback function of AFE79xx TI transceiver. This application note highlights the features and performance of AFE79xx as indigenous single chip repeater function for achieving low latency signal loopback using normal RX, TX pair and fast signal loopback using RX feedback and TX pair.

The application note includes the following key points.

  • Understanding and configuring internal loopback JESD and fast loopback modes of AFE79xx.
  • Measuring Group delay and Gain response across different data rates highlighting minimum latency sub 2 us and flat passband response for applied wideband spectrum bandwidth.
  • Measuring Fast Feedback Analog Loop response Group delay to achieve sub 50-ns group delay response for applications demanding lowest latency in wide bandwidth (1 GHz) repeater signal chain application

Trademarks

All trademarks are the property of their respective owners.

 
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