SBAU470 June   2026 ADS124S18

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 Getting Started With the ADS124S18EVM
  8. 2Hardware
    1. 2.1 Analog and Digital Power Supplies
    2. 2.2 Analog Input Connections
    3. 2.3 Digital Signal and Connection
    4. 2.4 Serial Interface
    5. 2.5 EEPROM
    6. 2.6 Connecting to an External Controller
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 ADS124S18EVM Software Installation
    3. 3.3 Device Manager Check
  10. 4EVM Operation and Implementation Results
    1. 4.1 Evaluation Setup
    2. 4.2 ADC Capture Settings
    3. 4.3 Register Configurations
    4. 4.4 Time Domain Display
    5. 4.5 Spectral Analysis Display
    6. 4.6 Histogram Analysis Display
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Related Documentation
    1. 7.1 Supplemental Content

2.1 Analog and Digital Power Supplies

The ADS124S18 supports a wide unipolar AVDD range from 1.74V to 3.6V. By default, the ADS124S18EVM AVDD uses 3.3V power supply from the PAMB controller card. The PAMB controller card generates the 3.3V supply using the 5V rail provided by USB. Alternatively, an external power supply between +1.74V and +3.6V can be provided on the J9 terminal block on the ADS124S18EVM.

Figure 2-1 shows the connection options for the AVDD and IOVDD power supply that are required for normal operation on the ADS124S18EVM.

ADS124S18EVM-PDK Power Supply Connection Figure 2-1 Power Supply Connection

Figure 2-2 shows that two LEDs light up on the PAMB controller card when the USB cable is plugged into the computer. LED D1 on the PAMB indicates that the ADS124S18EVM-PDK is ready to communicate with the GUI software. LED D5 on the PAMB controller card indicates that the 5V output is active.

Figure 2-2 shows two LEDs on the ADS124S18EVM that indicate a valid power supply. IOVDD LED denotes that the IOVDD power supply is active. AVDD LED indicates that the AVDD power supply is active.

The ADS124S18 accepts an IOVDD power supply range from +1.65V to +5.25V. On the ADS124S18EVM, the ADS124S18 IOVDD is a fixed value of 3.3V. As with AVDD, this 3.3V IOVDD is sourced from the USB power supply voltage and is used as the power supply on the PAMB controller card. Alternatively, an external power supply between +1.74V and +3.6V can be provided to the pin 1 of J1 header as the IOVDD and AVDD power supply for the ADS124S18 on the EVM when the PAMB board is not used and an external MCU is used to communicate with the ADS124S18. Remove resistor R1 if the IOVDD power supply voltage is different from the AVDD power supply voltage when using an external MCU.

The RESET button on the PAMB controller board can be pressed to reset the PAMB controller board if necessary.

ADS124S18EVM-PDK LED Indicators on the DC313A and the PAMB Figure 2-2 LED Indicators on the DC313A and the PAMB