SBAU269C October   2016  – August 2021 ADS8900B

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 ADS8900EVM-PDK Kit Features
    2. 1.2 ADS8900EVM Features
  3. 2Analog Interface
    1. 2.1 ADS8900B Connections and Decoupling
    2. 2.2 ADC Amplifier Input Drive
    3. 2.3 Voltage Reference and VCM Scaling
  4. 3Digital Interface
    1. 3.1 multiSPI™ for ADC Digital I/O
    2. 3.2 I2C Bus for Onboard EEPROM
  5. 4Power Supplies
    1. 4.1 Positive Supply and Test Points
    2. 4.2 Negative Supply
  6. 5ADS8900EVM-PDK Initial Setup
    1. 5.1 Software Installation
    2. 5.2 Default Jumper Settings for Differential Inputs
    3. 5.3 Default Jumpers for Bipolar, Single-Ended Inputs
    4. 5.4 Default Jumpers for Unipolar, Single-Ended Inputs
    5. 5.5 External Source Requirements for ADS8900 Evaluation
  7. 6ADS8900EVM-PDK Operation
    1. 6.1 EVM GUI Global Settings for ADC Control
    2. 6.2 Register Map Configuration Tool
    3. 6.3 Time Domain Display Tool
    4. 6.4 Spectral Analysis Tool
    5. 6.5 Histogram Tool
    6. 6.6 Linearity Analysis Tool
    7. 6.7 ADS8900BEVM Support for ADS8910B and ADS8920B Devices
  8. 7Bill of Materials, PCB Layout, and Schematics
    1. 7.1 Bill of Materials (BOM)
    2. 7.2 PCB Layout
    3. 7.3 Schematics
  9. 8Revision History

5.5 External Source Requirements for ADS8900 Evaluation

The ADS8900B is a very low-distortion, low-noise ADC. In order to achieve the full specified ADC performance, use a low-distortion, low-noise signal source. Table 5-4 lists the recommended minimum specifications for a signal source that can be used to achieve the specified performance.

Table 5-4 External Source Requirements for ADS8900 Evaluation
Specification Description Specification Value
Signal frequency 2 kHz
External source type Balanced differential
External source common-mode 0 V or floating
External source impedance (RS) 10 Ω–30 Ω
External source differential impedance
(RS_DIFF = 2 × RS)		 20 Ω–60 Ω
Source differential signal
(VPP amplitude for –0.1 dBFS)		 (2 x Rs x 4.94 x 10-3) + 9.9 V or (RS_DIFF x 4.94 x 10-3) + 9.9 V
Maximum noise 10 µVRMS
Maximum SNR 110 dB
Maximum THD –130 dB