SBAU373A April   2021  – June 2022

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Features
  4. 2Analog Interface
    1. 2.1 Analog Input
    2. 2.2 Shutdown
    3. 2.3 Analog Output
  5. 3Power Supplies
    1. 3.1 VDD1 Input
    2. 3.2 VDD2 Input
  6. 4EVM Operation
    1. 4.1 Analog Input and VDD1 Power: J3 and J1
    2. 4.2 Analog Outputs and VDD2 Power: J4 and J2
    3. 4.3 Device Operation
  7. 5Board Layout
  8. 6Bill of Materials and Schematics
    1. 6.1 Bill of Materials
    2. 6.2 Schematics
  9. 7Related Documentation
  10. 8Revision History

4.3 Device Operation

When the VDD1 and VDD2 power is applied to the EVM, the differential analog output is available with a fixed gain of 8.2 for the AMC1400 or 1 for the AMC1411 and a DC offset equal to 1.44 V (typical).

An analog input signal may be applied directly at screw terminal J3. See Figure 2-1 and Table 4-1 for details. The analog input range is specified at –250 mV to 250 mV for the AMC1400 or 0 V to 2 V for the AMC1411.

For the AMC1400 isolation amplifier, the analog output has a nominal gain of 8.2. With an input voltage of –250 mV to 250 mV, the nominal output is –2 V to 2 V differential. For the AMC1411 isolation amplifier, the analog output has a nominal gain of 1. With an input voltage of 0 V to 2 V, the nominal output is 0 V to 2 V differential. For both devices the output is centered on a 1.44-V output common-mode voltage, providing a convenient analog input range to the embedded ADCs of the MSP430 and TMS320C2000 series of digital processors.