SBAU411 February   2023 ADS127L21

 

  1.   Abstract
  2.   Trademarks
  3. 1EVM Overview
    1. 1.1 ADS127L21 EVM Kit
    2. 1.2 ADS127L21EVM Board
    3. 1.3 ADS127L21EVM-PDK-GUI Unsupported Features
    4. 1.4 Related Documentation
  4. 2Analog Interface
    1. 2.1 EVM Analog Input Options
    2. 2.2 ADC Connections and Decoupling
    3. 2.3 ADC Input Drive Amplifiers
    4. 2.4 VCOM Buffer
    5. 2.5 Onboard Voltage Reference
    6. 2.6 External Voltage Reference
    7. 2.7 Clock Tree
  5. 3Digital Interface
    1. 3.1 Serial Interface
    2. 3.2 I2C bus for Onboard EEPROM
  6. 4Power Supplies
    1. 4.1 Power Connection and Configuration
    2. 4.2 Low Dropout Regulator (LDO)
  7. 5ADS127L21 EVM Software Installation
  8. 6EVM Operation
    1. 6.1 Connecting the Hardware
    2. 6.2 Optional EVM Connections
    3. 6.3 EVM GUI Global Settings for ADC Control
    4. 6.4 Time Domain Display
    5. 6.5 Frequency Domain Display
    6. 6.6 Histogram Display
    7. 6.7 Digital Filter Configuration
    8. 6.8 Digital Filter Response
  9. 7Bill of Materials, Schematics, and Layout
    1. 7.1 Bill of Materials
    2. 7.2 Schematics
    3. 7.3 Board Layout

Abstract

This user's guide describes the characteristics, operation, and use of the ADS127L21 evaluation module (EVM). This kit is an evaluation platform for the ADS127L21, which is a 24-bit, high-speed, wide-bandwidth, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The ADS127L21 offers excellent ac and dc performance, along with multiple internal digital filter options including a fully programmable finite impulse response (FIR) and infinite impulse response (IIR) filter, making the device useful for a wide variety of data acquisition applications. The ADS127L21EVM eases the evaluation of the device with hardware, software, and computer connectivity through the universal serial bus (USB) interface. This user's guide includes complete circuit descriptions, schematic diagrams, and a bill of materials. Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the ADS127L21EVM.