SBAU213A September   2013  – July 2020 ADS8860

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 ADS8860EVM Kit
    2. 1.2 ADS8860EVM Board
  3. 2EVM Analog Interface
    1. 2.1 ADC Drive Amplifier and Filter
    2. 2.2 Reference Drive
  4. 3Digital Interface
    1. 3.1 Serial Interface (SPI)
    2. 3.2 I2C Bus for the Onboard EEPROM
  5. 4Power Supplies
  6. 5ADS8860EVM Initial Setup
    1. 5.1 Software Installation
  7. 6EVM Operation
    1. 6.1 Connecting the Hardware
    2. 6.2 Using the Optional Precision Signal Injector (PSI)
    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
  8. 7Bill of Materials, Schematics, and Layout
    1. 7.1 Bill of Materials
    2. 7.2 Board Layouts
    3. 7.3 Schematics
  9. 8Reference
  10. 9Revision History

4 Power Supplies

The PHI provides multiple power-supply options for the EVM, derived from the USB supply of the computer. The EEPROM on the ADS8860EVM uses a 3.3-V power supply generated directly by the PHI. The EVM_REG_5V5 is a 5.5-V supply from the PHI and is applied to the input of two LDOs to generate other supplies on the EVM. The analog supply of the ADC (AVDD = 3.3 V) is powered by the TPS7A4700RGWR (U11) LDO. A 5.3-V supply is also generated using TPS7A4700RGWR (U9) LDO. This supply powers the voltage reference (U2) and amplifier (U4). The ADC digital supply (DVDD = 3.3 V), is generated by the PHI. Three LEDs are connected to the 5.3-V, AVDD, and DVDD supplies. These LEDs illuminate after the software GUI loads and the PHI turns on its output power supplies.

GUID-6A06F006-7794-4985-8B33-07CBF7AE2757-low.gifFigure 4-1 Power Supplies, Regulators, and Indicators