SLVSL58 September   2026

ADVANCE INFORMATION  

  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 ADS111C04EVM
  8. 2Hardware
    1. 2.1 ADS111C04EVM and ADS111C02EVM
      1. 2.1.1 Power Supplies (ADS111C02EVM and ADS111C04EVM)
      2. 2.1.2 Serial Interface (ADS111C02EVM and ADS111C04EVM)
        1. 2.1.2.1 Digital Signal Connections (ADS111C02EVM and ADS111C04EVM)
        2. 2.1.2.2 Level Translator (ADS111C02EVM and ADS111C04EVM)
      3. 2.1.3 ADS111C04EVM
        1. 2.1.3.1 ADC Connections and Decoupling (ADS111C04EVM)
        2. 2.1.3.2 Analog Inputs (ADS111C04EVM)
      4. 2.1.4 ADS111C02EVM
        1. 2.1.4.1 ADC Connections and Decoupling (ADS111C02EVM)
        2. 2.1.4.2 Analog Inputs (ADS111C02EVM)
    2. 2.2 ADS111S04EVM and ADS111S02EVM
      1. 2.2.1 Power Supplies (ADS111S02EVM and ADS111S04EVM)
      2. 2.2.2 Serial Interface (ADS111S02EVM and ADS111S04EVM)
        1. 2.2.2.1 Digital Signal Connections (ADS111S02EVM and ADS111S04EVM)
        2. 2.2.2.2 Level Translator (ADS111S02EVM and ADS111S04EVM)
      3. 2.2.3 ADS111S04EVM
        1. 2.2.3.1 ADC Connections and Decoupling (ADS111S04EVM)
        2. 2.2.3.2 Analog Inputs (ADS111S04EVM)
      4. 2.2.4 ADS111S02EVM
        1. 2.2.4.1 ADC Connections and Decoupling (ADS111S02EVM)
        2. 2.2.4.2 Analog Inputs (ADS111S02EVM)
  9. 3Software
    1. 3.1 Software Description
  10. 4Hardware Design Files
    1. 4.1 Schematics (ADS111C04EVM)
    2. 4.2 Schematics (ADS111C02EVM)
    3. 4.3 Schematics (ADS111S04EVM)
    4. 4.4 Schematics (ADS111S02EVM)
    5. 4.5 Schematics (EVM Hardware)
    6. 4.6 PCB Layouts
    7. 4.7 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks

2.1.4.2 Analog Inputs (ADS111C02EVM)

Figure 2-1 shows the analog input header J8. The analog inputs include first-order resistor-capacitor filters that limit aliasing and noise effects. The differential pairs include an additional common-mode capacitor that filters common-mode noise.

ADS111C02EVM ADS111C04EVM ADS111S02EVM ADS111S04EVM Analog Inputs (ADS111C02EVM) Figure 2-10 Analog Inputs (ADS111C02EVM)

Equation 7 shows the calculation for the differential cut-off frequency. Equation 8 shows the calculation for the common-mode cut-off frequency.

Equation 3. f c diff = 1 / [ 2 π × ( R1 + R2 ) × C diff ] = 1 / [ 2 π × ( 499 + 499 ) × 4700 pF ] ≅ 34 kHz
Equation 4. f c cm = 1 / [ 2 π × R × C cm ] = 1 / [ 2 π × 499 × 470 pF ] ≅ 680 kHz