SBAU330C June   2019  – January 2022 AMC3301 , AMC3301-Q1 , AMC3302 , AMC3302-Q1 , AMC3330 , AMC3330-Q1

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 Features
    2. 1.2 Introduction
  3. 2Analog Interface
    1. 2.1 Analog Inputs
    2. 2.2 Analog Outputs
  4. 3Power Supplies
    1. 3.1 VDD Input
  5. 4EVM Operation
    1. 4.1 Analog Inputs: J2
    2. 4.2 User Power and Analog Output: J1 and J3
    3. 4.3 Device Operation
  6. 5Layout, BOM, and Schematic
    1. 5.1 Layout
    2. 5.2 Bill of Materials
    3. 5.3 Schematic
  7. 6Revision History

4.3 Device Operation

After the VDD power is applied to the AMC3301EVM, AMC3302EVM, or AMC3330EVM, the analog outputs are available with a fixed gain and a DC common-mode offset equal to 1.44 V.

An analog input signal can be applied directly at screw terminal J2. See Figure 2-1 and Table 4-1 for details. The differential analog input range for the AMC3301, INP to INN, is specified as ±250 mV with a maximum of ±320 mV before clipping occurs. The differential analog input range for the AMC3302, INP to INN, is specified as ±50 mV with a maximum of ±64 mV before clipping occurs. The differential analog input range for the AMC3330, INP to INN, is specified as ±1 V with a maximum of ±1.25 V before clipping occurs.

The analog output of the AMC3301 isolation amplifier has a nominal gain of 8.2, whereas the AMC3302 isolation amplifier has a nominal gain of 41, and the AMC3330 isolation amplifier has a nominal gain of 2. For the AMC3301, with a full-scale input voltage of ±250 mV, the nominal output is ±2.05 V. For the AMC3302, with a full-scale input voltage of ±50 mV, the nominal output is ±2.05 V. For the AMC3330, with a full-scale input voltage of ±1 V the nominal output is ±2 V.

The output voltage of the AMC3301EVM, AMC3302EVM, and AMC3330EVM is centered on 1.44 V and provides a convenient analog input range to the embedded analog-to-digital converters (ADCs) of the MSP430 and TMS320C2000 series of digital processors.