SLOU582 September   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Pin Specifications
    2. 2.2 Power Requirements
    3. 2.3 Input Connectors
    4. 2.4 Output Connectors
    5. 2.5 Onboard Bandpass Filter
    6. 2.6 LNA and AFE Enable/Disable
    7. 2.7 Offset Cancellation And Log In- Cap Capacitor Value Selection
  8. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks

2.5 Onboard Bandpass Filter

To filter out the input noise outside the frequency of interest, a bandpass need to be added before LOG input. This can either be done by connected an external bandpass filter between LNA out (J12) and LOG input+ (J1) or using the onboard bandpass filter provided on the EVM. Note that the RLC components of BPF need to be populated by the user as per the filter center frequency and quality factor requirement. To use the onboard BPF, short R18 and R19 and open R25 and R2.