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

6.2 Using the Optional Precision Signal Injector (PSI)

The ADS8860 has excellent AC specifications (typically SNR = 93 dB, THD = -108 dB). Many commercial signal generators cannot generate a signal with low enough noise and distortion to properly evaluate this device. Texas Instruments offers a evaluation module that acts as a high-fidelity signal generator (for f = 2 kHz). This signal generator uses a 2-kHz, fifth-order, band-pass filter to generate a very low noise, low distortion signal. Jumper positions for single-ended operation are provided in Table 6-1. See the PSIEVM for more information on this EVM.

GUID-E6EBD2E8-7BD5-4BDB-8E85-611BF063EC7B-low.gif Figure 6-3 PSI Signal Generator Connection
Table 6-1 Jumper Positions for PSI
Jumper Position Comment
JP1 FILT Connects a 2-kHz filter
JP3 FILT Connects a 2-kHz filter
JP4 VCM Common-mode control for single-ended signals enabled
JP8 GND Common-mode control for differential signals disabled