SBAU399 May   2022

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 Features
    2. 1.2 Introduction
  3. 2Analog Interface
    1. 2.1 Analog Inputs
  4. 3Digital Interface
  5. 4Power Supplies and Device Operation
    1. 4.1 AVDD and DVDD Inputs: J2 and J3
    2. 4.2 Device Operation
  6. 5Layout, Bill of Materials, and Schematic
    1. 5.1 Printed Circuit Board Layout
    2. 5.2 Bill of Materials
    3. 5.3 Schematic

2.1 Analog Inputs

The analog input to the AMC1333EVM board allows connection to AINP and AINN through an R/C filter with 10-Ω resistors (R5 and R6) and a 10-nF capacitor (C2). If filtering is not required, the C2 capacitor can be removed and the R5 and R6 resistors can be replaced with 0-Ω resistors.

The user optional resistor divider network that consists of R1, R2, and R3 is not populated by default. Populating this resistor divider network allows the user to select values of R1, R2, and R3 to generate a voltage across R3 for voltage sensing. Figure 2-1 shows an input circuit schematic for the AMC1333EVM and Table 2-1 lists the screw terminal connections.

Figure 2-1 AMC1333EVM Schematic: Analog Input Section
Table 2-1 J1: Analog Inputs
Pin Number Signal Description
J1.1 AINP Noninverting analog input to the AMC1333
J1.2 AINN Inverting input to the AMC1333
J1.3 AGND Analog ground reference
CAUTION: Carefully review the AMC1333 product data sheet for the limitations of the analog input range, and ensure that the appropriate analog and digital voltages are applied prior to connecting any analog input to the EVM. The EVM uses ±1 V for the AMC1333 and is not certified for high-voltage operation.