SBOU286A October   2022  – December 2022 INA350 , INA351

 

  1.   DDF Instrumentation Amplifier Evaluation Module
  2.   Trademarks
  3. 1Overview
    1. 1.1 Features
    2. 1.2 Instrumentation Amplifier Pinout
    3. 1.3 Compatible Devices
  4. 2PCB Layout
  5. 3Schematic
  6. 4EVM Components
    1. 4.1 Power
    2. 4.2 Inputs
      1. 4.2.1 Input Filtering
    3. 4.3 Output
      1. 4.3.1 Output Filtering
    4. 4.4 Reference
    5. 4.5 Other Passives
    6. 4.6 Miscellaneous
  7. 5Quick Start
    1. 5.1 Dual-Supply Configuration
    2. 5.2 Single-Supply Configuration
      1. 5.2.1 Direct-Reference Connection
      2. 5.2.2 Buffered-Reference Voltage Connection
  8. 6Bill of Materials
  9. 7Revision History

5.2.1 Direct-Reference Connection

Figure 5-2 shows an example of how to set up the EVM for single-supply operation with a direct voltage connection to the reference (REF pin).

Figure 5-2 Single-Supply Configuration, Direct REF Connection

The following connections were made:

  1. +VS to V+ test point
  2. GND to V– test point
  3. Reference voltage to VREF test point
  4. Differential input signal to IN– and IN+ test points
  5. Observe output at OUT test point

Note:

1. C9 and C10 are prepopulated with 0.1-µF power-supply decoupling capacitors. It is not required to remove C9 for proper single-supply operation. Refer to the device data sheet for additional power-supply decoupling information (Table 1-1).

2. A valid input common mode must be present on both inputs of the IA for proper operation.