SBAU413A october   2022  – may 2023

 

  1.   Abstract
  2.   Trademarks
  3. 1EVM Overview
    1. 1.1 ADS131B26Q1EVM-PDK Features
    2. 1.2 ADS131B26Q1EVM-PDK Quick-Start Guide
  4. 2Analog Interface
    1. 2.1 Terminal Blocks and Test Points
    2. 2.2 ADC1A and ADC1B
    3. 2.3 ADC2A and ADC2B
    4. 2.4 ADC3A and ADC3B
  5. 3Digital Interface
    1. 3.1 Connection to the PHI Controller
    2. 3.2 Digital Header
    3. 3.3 Clock Options
  6. 4Power Supplies
    1. 4.1 DC/DC Converter Circuit
    2. 4.2 ADC Power Supplies
    3. 4.3 Power Supply and Voltage Reference Decoupling
  7. 5ADS131B26Q1EVM-PDK Initial Setup
    1. 5.1 Default Jumper Settings
    2. 5.2 EVM Graphical User Interface (GUI) Software Installation
  8. 6ADS131B26Q1EVM-PDK Software Reference
    1. 6.1 Global Settings for ADC Control
    2. 6.2 Register Map Configuration
      1. 6.2.1 Register Map Basics
      2. 6.2.2 ADC1A, ADC3A and ADC1B, ADC3B Configuration
      3. 6.2.3 ADC2A and ADC2B Configuration
    3. 6.3 Analysis Tools
      1. 6.3.1 Time Domain Display
      2. 6.3.2 Spectral Analysis Tool
      3. 6.3.3 Histogram Analysis
      4. 6.3.4 Sequencer Analysis
  9. 7ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics
    1. 7.1 Bill of Materials (BOM)
    2. 7.2 PCB Layout
    3. 7.3 Schematics
  10. 8Revision History

3.1 Connection to the PHI Controller

The ADS131B26Q1EVM-PDK communicates with the PHI controller through a shrouded, 60-pin connector (J9). There are two round standoffs next to J9 with Phillips-head screws. To connect the PHI controller to the EVM, remove the screws, attach the PHI controller to the EVM, and replace the screws into the standoffs. The screws secure the EVM to the PHI and makes sure the connection between the two boards is complete.

Table 3-1 lists the different PHI connection and their functions.

Table 3-1 PHI Connector Pin Functions
PHI Connector Pin Name PHI Connector Pin Function
EVM_REG_5.5VJ9[1]Boosted 5.5-V supply from the USB (not used)
EVM_RAW_5V J9[2] Raw USB 5-V supply; optional supply for the DC/DC input
ISO_GNDJ9[3]Ground connection for the isolated host controller side of the EVM
ISO_GPIO0/MHDJ9[6]General-purpose digital input/output 0 or missing host detect output
ISO_GPIO1J9[8] General-purpose digital input/output 1
ISO_GPIO2/FAULTJ9[10] General-purpose digital input/output 2 or fault output
ISO_GPIO3/OCCAJ9[12] General-purpose digital input/output 3 or overcurrent comparator A output
ISO_GPIO4/OCCBJ9[14] General-purpose digital input/output 4 or overcurrent comparator B output
ISO_SDIJ9[18]SPI: Serial data input to the ADC
ISO_CSnJ9[22]SPI: Chip-select input from the PHI controller; active low
ISO_SCLKJ9[24]SPI: Serial data clock input
ISO_CAPCLKJ9[26, 28]PHI clock signal to synchronize SPI transactions with the propagation delay from the EVM
ISO_DRDYnJ9[30]SPI: Data-ready output from the ADC; active low
ISO_SDOJ9[38]SPI: Serial data output from the ADC
ISO_RESETnJ9[46]Reset input; active low
WPJ9[49]Write protection for the EEPROM
ISO_3V3J9[50]Power-supply source for the isolated host controller side of the EVM and default supply input to the DC/DC circuit
EVM_ID_SDAJ9[56]I2C serial data for the EEPROM
EVM_ID_SCLJ9[58]I2C serial clock for the EEPROM
ID_PWRJ9[59]Power-supply source for the EEPROM
ISO_GNDJ9[60]Ground connection for the isolated host controller side of the EVM