SBOU252 August   2021 OPA4991 , OPA4991-Q1 , TLV9004 , TLV9004-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2DYY-AMP-EVM Kit Contents
  4. 3Circuit Configurations
  5. 4Schematic and PCB Layout
    1. 4.1 Schematic
    2. 4.2 Difference Amplifier
    3. 4.3 Non-inverting Amplifier
    4. 4.4 Inverting Amplifier
    5. 4.5 PCB Layout
  6. 5Connections
    1. 5.1 Power
    2. 5.2 Input Connections
    3. 5.3 Output Connections
    4. 5.4 Reference Voltage Connections
  7. 6Bill of Materials (BOM)
  8. 7References

5.4 Reference Voltage Connections

Signals or DC voltages for the reference voltage can be applied to the DYY-AMP-EVM through the test points labeled VREF. The following number correlates to the specific channel associated with the VREF pin. RPL can be used to set the Vref pin to 0-V without the use of external connections. To set the VREF pin to GND, populate the respective pad with a 0 ohm resistor.