SBOU253 December   2020 LMH32404 , LMH32404-Q1

 

  1. 1Trademarks
  2. 2Introduction
    1. 2.1 Features
    2. 2.2 EVM Specifications
  3. 3Power Connections
  4. 4Input and Output Connections
    1. 4.1 Channel Multiplexer Mode Control
    2. 4.2 Input DC Current Cancellation
    3. 4.3 Enable Function
    4. 4.4 Optional VOCM Pin Connection
    5. 4.5 Option VOD Connection
  5. 5Board Layout
  6. 6Schematic and Bill of Materials
    1. 6.1 Bill of Materials
      1.      Related Documentation

Option VOD Connection

The LMH32404 device also features a differential output offset pin that controls the DC differential offset of the each channel's two outputs. The EVM features a test point (TP1) as well as an optional resistor divider formed by R18 and R24 to set the voltage on the VOD pin. The DC output differential voltage defaults to approximately 500 mV if left floating. This feature is designed to compensate for unipolar input signals to achieve the maximum dynamic range of the differential outputs. See LMH32404 250 MHz, Quad-channel, Differential Output Transimpedance Amplifier data sheet for more information.