SBOU282A December   2022  – March 2023 OPA928

 

  1.   Abstract
  2.   Trademarks
  3. 1Read This First
    1. 1.1 EVM Cleanliness Guidelines
  4. 2Overview
    1. 2.1 Guarding and Shielding
  5. 3Getting Started
    1. 3.1 Related Documentation From Texas Instruments
    2. 3.2 Electrostatic Discharge Caution
  6. 4EVM Circuit Description
    1. 4.1 High-Impedance Amplifier Circuit
    2. 4.2 Transimpedance Amplifier Circuit
      1. 4.2.1 Configure the TIA
      2. 4.2.2 TIA Functions
        1. 4.2.2.1 T-Switch
        2. 4.2.2.2 Guarded Diode Limiter
  7. 5Cleaning the EVM
    1. 5.1 Ultrasonic Wash
    2. 5.2 Manual Cleaning Procedure
  8. 6Schematic, PCB Layout, and Bill of Materials
    1. 6.1 EVM Schematic
    2. 6.2 PCB Layout
    3. 6.3 Bill of Materials

5 Cleaning the EVM

Follow these cleaning instructions whenever the EVM is suspected of contamination within the guard area and performance is degraded.

The recommended cleaning procedure requires access to an ultrasonic bath. If an ultrasonic bath is not available, a manual cleaning procedure is detailed below. The ultrasonic wash produces the best and most consistent outcomes and is preferred over manual cleaning.

Remove all RF shields from the EVM before cleaning and follow the instructions for handling the board as described in the Section 1.1.