SBOU236A February   2020  – March 2021 ALM2403-Q1

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 Related Documentation
    2. 1.2 Electrostatic Discharge Caution
    3. 1.3 Hot Surface Warning
  3. 2EVM Circuit Description
  4. 3Jumper Settings
  5. 4Power-Supply Connections
  6. 5Input and Output Connections
  7. 6Modifications
  8. 7Schematic, PCB Layout, and Bill of Materials
    1. 7.1 Schematic
    2. 7.2 PCB Layout
    3. 7.3 Bill of Materials
  9. 8Revision History

4 Power-Supply Connections

The power-supply connections for the ALM2403Q1EVM are provided through connector J7 at the top of the EVM. Table 4-1 summarizes the pin definition for supply connector J7, and the allowed voltage range for each supply connection.

Table 4-1 ALM2403Q1EVM Supply-Range Specifications
Pin Number Supply Connection Voltage Range
J7.1 Input stage supply (VCC) 5 V to 24 V
J7.2 Ground 0 V

The ALM2403Q1 is configured to use a single supply connected through J7.1 (VCC) and J7.2 (GND). By default, jumper J5 is set to shunt pins 2-3 placing a Schottky diode (D1) in series with the power supply connection. The Schottky diode blocks any reverse current into the VCC_S supply during a fault condition when the output of the amplifier is shorted to a higher potential than the VCC_S supply. Place J5 to shunt pins 1-2 to bypass the optional diode (D1). Figure 4-1 shows the ALM2403Q1EVM voltage supply connections.

GUID-FD5ECCC2-AF26-4E96-A71A-5EF8E9413E09-low.gifFigure 4-1 ALM2403Q1EVM Voltage Supply Connections