SBAA635 July   2024 AFE7950 , AFE7950-SP , AFE7951 , AFE7953 , AFE7954 , AFE7955

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2AFE79XX TX Architecture
  6. 3Numerically Controlled Oscillator
  7. 4Configuring the AFE79XX for Multi-Band Jamming
    1. 4.1 Overview of Configurability
    2. 4.2 Jamming Related Latte Functions and Parameters
    3. 4.3 Results
  8. 5Summary
  9. 6References

Abstract

This application note describes the usage of AFFE79XX family of devices as chirp frequency generators. The AFE79XX is a family of high-performance, wide-bandwidth multi-channel transceivers, integrating four RF sampling transmitter chains, four RF sampling receiver chains, and up to two RF sampling digitizing auxiliary chains (feedback paths). Each receiver chain includes a 25dB range DSA (Digital Step Attenuator), followed by a 3GSPS analog-to-digital converter (ADC). Each transmitter chain includes a single or dual digital up converters (DUCs) supporting up to 1200MHz combined signal bandwidth. The output of the DUCs drives a 12-GSPS digital-to-analog converter (DAC). The feedback path includes a 25dB range DSA driving a 3GSPS RF-sampling ADC, followed by a DDC with up to 1200MHz bandwidth. The AFE79xx’s improvement in density and flexibility enables high-channel-count, multi-mission systems, and makes these devices a very attractive option for wideband linear chirp frequency applications.