SBAU407 april   2023 ADS8354

 

  1.   Abstract
  2.   Trademarks
  3. 1Overview
    1. 1.1 ADS8354EVM-PDK Features
    2. 1.2 ADS8354EVM Features
    3. 1.3 Related Documentation From Texas Instruments
  4. 2Analog Interface
    1. 2.1 Connectors for Analog Inputs
    2. 2.2 ADC Input Signal Driver
      1. 2.2.1 Input Signal Path
  5. 3Digital Interfaces
    1. 3.1 SPI for the ADC Digital I/O
  6. 4Power Supplies
    1. 4.1 ADC Input Driver Configuration
    2. 4.2 ADC Voltage Reference Configuration
  7. 5ADS8354EVM-PDK Initial Setup
    1. 5.1 Default Jumper Settings
    2. 5.2 EVM Graphical User Interface Software Installation
  8. 6ADS8354EVM-PDK Operation
    1. 6.1 EVM GUI Global Settings for ADC Control
    2. 6.2 Time Domain Display Tool
    3. 6.3 Spectral Analysis Tool
    4. 6.4 Histogram Analysis Tool
  9. 7Bill of Materials, Printed-Circuit Board Layout, and Schematics
    1. 7.1 Bill of Materials
    2. 7.2 PCB Layout
    3. 7.3 Schematics

4.1 ADC Input Driver Configuration

The ADS8354 only supports fully differential inputs. The ADS8354EVM allows the user to apply a fully-differential signal on the SMA or jumpers mentioned in the input signal path, as discussed in Section 2.2.1. A provision for a single-ended to differential conversion exists by populating JP1 or JP2 and applying a single-ended signal on the unpopulated jumper. The THS4561 common-mode voltage (VOCM) is set by the REF56025. REFIO / 2 can be used for VOCM by populating JP5 for ADCA and JP6 for ADCB. For various analog input full-scale ranges supported by the ADS8354 in fully-differential mode, see the ADS8354 data sheet. Table 4-1 shows the jumper configurations required for single-ended and fully differential analog inputs.

Table 4-1 Jumper Settings for ADC Input Driver Configuration
ADC Input Type ADC Input Full-Scale Range Required Jumper Settings Description
Single-ended analog inputs ±VREF JP3, JP4 = Open Apply single-ended input at J2, J4 or JP3[1], JP4[1]
JP1, JP2 = Closed Ground unused inputs
JP5, JP6 = Closed Sets VOCM as VREF / 2
±2 × VREF JP3, JP4 = Open Apply single-ended input at J2, J4 or JP3[1], JP4[1]
JP1, JP2 = Closed Ground unused inputs
JP5, JP6 = Open Sets VOCM as VREF
Fully differential analog inputs ±VREF JP1, JP2, JP3, JP4 = Open Apply differential input signals to J1, J2, J3, J4 or JP1[1], JP2[1], JP3[1], JP4[1]
J5, J6 = Closed Sets VOCM as VREF / 2
±2 × VREF JP1, JP2, JP3, JP4 = Open Apply differential input signals to J1, J2, J3, J4 or JP1[1], JP2[1], JP3[1], JP4[1]
JP5, JP6 = Open Sets VOCM as VREF