SBAU447 May   2024

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 EVM Coupon Locations and Descriptions
    2. 2.2 EVM Assembly Instructions
    3. 2.3 Interfaces
      1. 2.3.1 Analog Input
      2. 2.3.2 Amplifier Output
        1. 2.3.2.1 Differential Output
        2. 2.3.2.2 Single-Ended Output, Fixed Gain
        3. 2.3.2.3 Single-Ended Output, Ratiometric Gain
      3. 2.3.3 Modulator Output
        1. 2.3.3.1 Internal Clock
        2. 2.3.3.2 External Clock
    4. 2.4 Power Supplies
      1. 2.4.1 VDD1/AVDD Input
      2. 2.4.2 VDD2/DVDD Input
    5. 2.5 EVM Operation
      1. 2.5.1 Analog Input and VDD1/AVDD Power
      2. 2.5.2 Outputs and VDD2/DVDD Power
      3. 2.5.3 Test Procedure
        1. 2.5.3.1 Equipment Setup
        2. 2.5.3.2 Procedure
  9. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5Related Documentation

2.5.3.2 Procedure

  1. Set the first 5V (+/-10%) source and limit the current to 50mA as noted above. Connect the EVM voltage source to the connectors VDD2/DVDD pin referenced to GND2/DGND. Turn on the power source and make sure there is no more than the specified current limit in the device data sheet drawn.
  2. Set the second 5V (+/-10%) source and limit the current to 50mA as noted above. Connect the EVM voltage source to the connectors VDD1/AVDD pin referenced to GND1/AGND. Turn on the power source and make sure there is no more than the specified current limit in the device data sheet drawn.
  3. Tie inputs together and to ground. Use the oscilloscope or the DMM to verify that isolated power is present on both supplies. Measure the output of the device referenced to GND2/DGND and verify:
    1. For amplifiers using either the oscilloscope or the DMM: the isolated voltage is within the common-mode output voltage (typ. 1.44V).
    2. For modulators using the oscilloscope: the digital output is a stream of ones and zeros that are high 50% of the time and low 50% of the time.
    3. For modulators using the DMM: the DMM is about 50% magnitude of DVDD.
  4. Depending on the mounted device, apply the appropriate full-scale linear input signal. Typically: ±50mV, ±250mV, ±1V, or 0-2V.
  5. Measure the output with the oscilloscope or the DMM.
    1. For amplifiers using either the oscilloscope or the DMM: Verify that the output voltage swings between the specified range in the device data sheet. Typical input frequency is 10kHz.
      1. ±2.05V FSR for differential amplifiers.
      2. 0-2.25 FSR for single-ended amplifiers.
    2. For modulators using the oscilloscope: Verify that the digital output is proportional to the expected conversion. Apply a DC input signal.
      1. For a positive full scale linear input, the digital output needs to be high about 90% of the time.
      2. For a negative full scale linear input, the digital output needs to be high about 10% of the time.
    3. For modulators using the DMM: Verify that the digital output is proportional to the expected conversion. Apply a DC input signal.
      1. For a positive full scale linear input, the digital output needs to be about 90% magnitude of DVDD.
      2. For a negative full scale linear input, the digital output needs to be about 10% magnitude of DVDD.