SLAU905A August   2023  – November 2023 DAC81401

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Software
    1. 2.1 GUI Installation
    2. 2.2 Software Description
  8. 3Hardware
    1. 3.1 Power Requirements
    2. 3.2 Jumper Information
    3. 3.3 Setup
    4. 3.4 Header Information
    5. 3.5 Test Points
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Compliance Information
    1. 5.1 Compliance and Certifications
  11. 6Additional Information
    1. 6.1 Trademarks
  12. 7Revision History

3.1 Power Requirements

The USB connection at J12 provides 5 V to the EVM. This connection is necessary if using the DAC814xxEVM GUI, as the communication is done through the USB port and the FT4232 is powered by one of the LDOs on the board. On board supplies for DVDD (5-V USB supply through J1) and IOVDD ( LDO generated 1.8-V or 3.3-V through J5) are also available. DVDD and IOVDD power supply of DAC81401 can be provided externally through J5 and J7 respectively. AVDD and AVSS power supply of DAC81401 need to connected externally through J3 and J4 respectively. AVSS can be connected to GND through J2. Optional EXT HV POS (V+) and EXT HV NEG (V-) supplies are needed for OPA593 (U2, U5) while using the high-voltage gain stage.

  • AVDD : 0 to 41.5 V (default + 15 V)
  • AVSS : 0 to -21.5 V (default - 15 V)
  • DVDD : 4.5 V to 5.5 V (default + 5 V)
  • IOVDD : 1.7 V to 5.5 V (default + 3.3 V)
  • (AVDD - AVSS) must not be greater than 43 V
  • EXT HV POS (V+) - EXT HV NEG : ± 4 V to ±42.5 V or 8 V to 85 V (default ± 25 V)

Table 3-1 summarizes the external power connections.

Table 3-1 DAC81401EVM Power Supply Inputs
TerminalNameFunction
J3AVDDPositive supply voltage for the DAC81401 output buffers
J4AVSSNegative supply voltage for DAC81401 output buffers
J5DVDDDigital and analog supply voltage for the DAC81401
J7IOVDDIO supply voltage for setting the digital I/O operating voltage for the DAC81401
J9GNDGround connection
J13EXT HV POSOptional positive supply for high voltage gain stage operational amplifier
J14GNDGround connection
J15EXT HV NEGOptional negative supply for high voltage gain stage operational amplifier