SBOU272 November   2021 INA2126 , INA2128

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 Features
    2. 1.2 INA Pinout
    3. 1.3 Compatible Devices
  3. 2Quick Start
    1. 2.1 Dual-Supply Configuration
    2. 2.2 Single-Supply Configuration
      1. 2.2.1 Direct Reference Connection
      2. 2.2.2 Buffered-Reference Voltage Connection
  4. 3EVM Components
    1. 3.1 Power
    2. 3.2 Inputs
      1. 3.2.1 Input Filtering
    3. 3.3 Output
      1. 3.3.1 Output Filtering
    4. 3.4 Reference
    5. 3.5 Miscellaneous
  5. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials

2.2.1 Direct Reference Connection

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

Figure 2-2 Single-Supply Configuration, Direct Reference Connection
  1. +VS to test point TP1
  2. GND to test point TP11
  3. Install jumper shunt to positions 2 and 3 on J1
  4. Remove resistor R5 for REFA
    1. Remove resistor R25 for REFB
  5. Reference voltage to test point REFA (TP10)
    1. Reference voltage to test point REFB (TP18)
  6. Differential input signal connect to test points VinA– (TP14) and VinA+ (TP17) of channel A
    1. Differential input signal connect to test points VinB– (TP20) and VinB+ (TP22) of channel B
  7. Observe output at test point VOA (TP15)
    1. Observe output at test point VOB (TP21)
Note: C15 and C22 are prepopulated with 0.1-µF power-supply decoupling capacitors. C22 is not required to be removed for proper single-supply operation. See the respective device data sheet for additional power-supply decoupling information.