TIDUF45 May   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 ADS127L21
      2. 2.3.2 PGA855
      3. 2.3.3 REF70
  9. 3System Design Theory
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Description
      1. 4.1.1 Board Interface
      2. 4.1.2 Power Supplies
      3. 4.1.3 Clocking Tree
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 DC Accuracy Tests
      2. 4.4.2 Gain and Offset Temperature Drift
      3. 4.4.3 Nonlinearity
      4. 4.4.4 SNR and Noise Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

1.1 Key System Specifications

Key System Specifications

Table 1-1 lists the key system specifications realized by this reference design.
Table 1-1 Specifications
PARAMETER SPECIFICATIONS
Input signal range 0V to 32.768V (with 0.125V/V gain)
Gain Options 0.125, 0.25, 0.5, 1, 2, 4, 8, 16V/V
Digital Filter Options Wideband, low-latency, programmable IIR and FIR
Resolution 24 bits
Data Rate Up to 512kSPS (wideband filter)
Up to 1.365MSPS (low-latency filter)
SNR (1kHz, Gain = 1V/V) 108dB (wideband filter)
110dB (low-latency filter)
THD (1kHz, Gain = 1V/V) –121.4dB (wideband filter)
–121.4 dB (low-latency filter)
Bandwidth 224kHz (wideband filter)
357kHz (low-latency filter)
Calculated Typical DC Accuracy Offset error: ± 76μV
Gain error: ± 360ppm
Calculated Typical Temperature Drift Accuracy Offset drift: 350n V/°C
Gain drift: 1.1ppm/°C