SBASAX3A May   2025  – September 2025 ADS9326 , ADS9327

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Thermal Information
    4. 6.4  Recommended Operating Conditions
    5. 6.5  Electrical Characteristics 
    6. 6.6  Electrical Characteristics: AVDD = 5V
    7. 6.7  Electrical Characteristics: AVDD = 3.3V
    8. 6.8  Timing Requirements
    9. 6.9  Switching Characteristics
    10. 6.10 Timing Diagrams
    11. 6.11 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Inputs
      2. 7.3.2 Reference
        1. 7.3.2.1 Internal Reference
          1. 7.3.2.1.1 Selectable Internal Reference with 5V AVDD
        2. 7.3.2.2 External Reference
        3. 7.3.2.3 External Reference With External Reference Buffer
      3. 7.3.3 ADC Transfer Function
      4. 7.3.4 Data Interface
      5. 7.3.5 Programmable Data Averaging Filter
        1. 7.3.5.1 Simple Average
          1. 7.3.5.1.1 Simple Average with Noncontinuous CONVST
        2. 7.3.5.2 Moving Average
      6. 7.3.6 CRC on Output Data Interface
      7. 7.3.7 ADC Output Data Randomizer
      8. 7.3.8 Data Frame Width
      9. 7.3.9 Daisy-Chain Mode
        1. 7.3.9.1 Daisy-Clock Mode
    4. 7.4 Device Functional Modes
      1. 7.4.1 Reset
      2. 7.4.2 Normal Operation
      3. 7.4.3 Low-Latency Mode
      4. 7.4.4 CS-CONVST Short Mode
      5. 7.4.5 Register Read Mode
      6. 7.4.6 Initialization Sequence
    5. 7.5 Programming
      1. 7.5.1 SPI Frame Length for Register Operations
      2. 7.5.2 Register Map Lock
      3. 7.5.3 Register Write
      4. 7.5.4 Register Read
  9. 8 Register Map: ADS9327
    1. 8.1 Register Bank 0
    2. 8.2 Register Bank 1
    3. 8.3 Register Bank 2
  10. 9 Register Map: ADS9326
    1. 9.1 Register Bank 0
    2. 9.2 Register Bank 1
    3. 9.3 Register Bank 2
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Analog 1VPP Sine-Cosine Encoder Interface
      2. 10.2.2 Design Requirements
      3. 10.2.3 Detailed Design Procedure
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Mechanical Data

6.7 Electrical Characteristics: AVDD = 3.3V

at AVDD = 3.1V to 3.5V, VDD_1V8 = 1.75V to 1.85V, IOVDD = 1.75V to 3.3V, internal VREF = 2.5V, and maximum throughput (unless otherwise noted); minimum and maximum values at TA = –40°C to +125°C; typical values at TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
AC PERFORMANCE
SINAD Signal-to-noise + distortion ratio fIN = 2kHz 87.9 90.3 dB
fIN = 1MHz 88.4
SNR Signal-to-noise ratio fIN = 2kHz 88.1 90.4 dB
fIN = 1MHz 88.5
THD Total harmonic distortion fIN = 2kHz –112 dB
fIN = 1MHz –100
SFDR Spurious-free dynamic range fIN = 2kHz 112 dB
fIN = 1MHz 100
CMRR Common-mode rejection ratio fIN = dc to 1kHz, VIN = 50mVPP 70 dB
Channel-to-channel isolation VIN_ADCA = 0V,
fIN_ADCB = 10kHz at 100% FSR		 –110 dB
POWER SUPPLY
IAVDD Supply current from AVDD Full-speed (ADS9327) 3 3.4 mA
Full-speed (ADS9326) 2.1 2.5
No conversion (idle) (ADS9327) 1.2 1.5
No conversion (idle) (ADS9326) 1.2 1.5
Power-down 0.4 0.8
IVDD_1V8 Supply current from VDD_1V8 Full-speed (ADS9327) 9.5 10.3 mA
Full-speed (ADS9326) 6.9 7.4
No conversion (idle) (ADS9327) 6.4 7.2
No conversion (idle) (ADS9326) 4.9 5.5
Power-down 0.9 1.1
IIOVDD Supply current from IOVDD Full-speed (ADS9327), CLOAD = 10pF 2.7 3 mA
Full-speed (ADS9326), CLOAD = 10pF 1.6 1.8
No conversion (idle), CLOAD = 10pF 0.25 0.35
Power-down, CLOAD = 10pF 0.25 0.35