SBASAX3B May   2025  – April 2026 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 Burst Sample Operation
      4. 7.3.4 ADC Transfer Function
      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 Channel Averaging
      7. 7.3.7 Common-Mode Voltage Output
      8. 7.3.8 CRC on Output Data Interface
      9. 7.3.9 ADC Output Data Randomizer
    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  Data Interface
      2. 7.5.2  Data Frame Width
      3. 7.5.3  SPI Modes
      4. 7.5.4  CONVST Inversion
      5. 7.5.5  SCLK Echo Mode
      6. 7.5.6  Daisy-Chain Mode
      7. 7.5.7  SPI Frame Length for Register Operations
      8. 7.5.8  Register Map Lock
      9. 7.5.9  Register Write
      10. 7.5.10 Register Read
  9. 8 Register Map
    1. 8.1 Register Bank 0
    2. 8.2 Register Bank 1
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Analog 1VPP Sine-Cosine Encoder Interface
      2. 9.2.2 Design Requirements
      3. 9.2.3 Detailed Design Procedure
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Mechanical Data

6.11 Typical Characteristics

at TA = 25°C, AVDD = 5V, VDD_1V8 = 1.8V, external VREF = 4.096V, and maximum throughput (unless otherwise noted)


ADS9326 ADS9327 Typical INL

Typical INL = ±0.2LSB 
Figure 6-5 Typical INL

ADS9326 ADS9327 Typical INL Distribution (LSB)

2400 devices 
Figure 6-7 Typical INL Distribution (LSB)

ADS9326 ADS9327 Typical Gain Error Distribution (% FSR)

2400 devices 
Figure 6-9 Typical Gain Error Distribution (% FSR)

ADS9326 ADS9327 Typical FFT for fIN = 2kHz, external VREF = 3.3V

fIN = 2kHz, SNR = 91.5dB, THD = −119dB 
Figure 6-11 Typical FFT for fIN = 2kHz, external VREF = 3.3V

ADS9326 ADS9327 Typical FFT for fIN = 2kHz, Simple Average with OSR = 8

fIN = 2kHz, SNR = 101.8dB, THD = −117dB 
Figure 6-13 Typical FFT for fIN = 2kHz, Simple Average with OSR = 8

ADS9326 ADS9327 Typical FFT for fIN = 1MHz

fIN = 1MHz, SNR = 91dB, THD = −100dB, INT_BUFFER = inactive 
Figure 6-15 Typical FFT for fIN = 1MHz

ADS9326 ADS9327 THD vs Input Signal Frequency

 
Figure 6-17 THD vs Input Signal Frequency

ADS9326 ADS9327 SNR vs Simple Average Oversampling Ratio

 
Figure 6-19 SNR vs Simple Average Oversampling Ratio

ADS9326 ADS9327 SNR and THD vs VCMOUT

 
Figure 6-21 SNR and THD vs VCMOUT

ADS9326 ADS9327 INL vs Temperature

 
Figure 6-23 INL vs Temperature

ADS9326 ADS9327 INL, DNL vs Reference Voltage

 
Figure 6-25 INL, DNL vs Reference Voltage

ADS9326 ADS9327 Offset Error vs Temperature

 
Figure 6-27 Offset Error vs Temperature

ADS9326 ADS9327 SNR and SINAD vs Temperature

 
Figure 6-29 SNR and SINAD vs Temperature

ADS9326 ADS9327 1/f Noise for 0.1Hz to 10Hz Bandwidth

1.6MSPS Data Rate, 65,536 Samples Averaged per Reading, LFN_COMP = 40A1h 
Figure 6-31 1/f Noise for 0.1Hz to 10Hz Bandwidth

ADS9326 ADS9327 Common-Mode Analog Input Current vs Input Differential Voltage

Refer to INT_BUFFER register field description 
Figure 6-33 Common-Mode Analog Input Current vs Input Differential Voltage

ADS9326 ADS9327 AVDD and VDD_1V8 Current vs Sample Rate

 
Figure 6-35 AVDD and VDD_1V8 Current vs Sample Rate

ADS9326 ADS9327 AVDD Current vs AVDD Voltage with High AVDD

4.096V reference 
Figure 6-37 AVDD Current vs AVDD Voltage with High AVDD

ADS9326 ADS9327 IOVDD Current vs IOVDD Voltage

 
Figure 6-39 IOVDD Current vs IOVDD Voltage

ADS9326 ADS9327 REF_CAP vs Sample Rate with 4.096V Reference

 
Figure 6-41 REF_CAP vs Sample Rate with 4.096V Reference

ADS9326 ADS9327 REF_CAP Voltage vs Temperature

 
Figure 6-43 REF_CAP Voltage vs Temperature

ADS9326 ADS9327 REFIO Voltage vs Temperature with 2.5V Reference

Internal 2.5V reference 
Figure 6-45 REFIO Voltage vs Temperature with 2.5V Reference

ADS9326 ADS9327 VCMOUT Voltage vs Temperature with 4.096V Reference

4.096V reference 
Figure 6-47 VCMOUT Voltage vs Temperature with 4.096V Reference

ADS9326 ADS9327 Typical DNL

Typical DNL = ±0.15LSB 
Figure 6-6 Typical DNL

ADS9326 ADS9327 Typical Offset Error Distribution (LSB)

2400 devices 
Figure 6-8 Typical Offset Error Distribution (LSB)

ADS9326 ADS9327 Typical FFT for fIN = 2kHz

fIN = 2kHz, SNR = 93dB, THD = −120dB 
Figure 6-10 Typical FFT for fIN = 2kHz

ADS9326 ADS9327 Typical FFT for fIN = 2kHz, external VREF = 2.5V

fIN = 2kHz, SNR = 90.4dB, THD = −117dB 
Figure 6-12 Typical FFT for fIN = 2kHz, external VREF = 2.5V

ADS9326 ADS9327 Typical FFT for fIN = 100kHz

fIN = 100kHz, SNR = 92.6dB, THD = −115dB 
Figure 6-14 Typical FFT for fIN = 100kHz

ADS9326 ADS9327 SNR and SINAD vs Input Signal Frequency

 
Figure 6-16 SNR and SINAD vs Input Signal Frequency

ADS9326 ADS9327 SNR and THD vs Reference Voltage

 
Figure 6-18 SNR and THD vs Reference Voltage

ADS9326 ADS9327 SNR vs Moving Average Oversampling Ratio

 
Figure 6-20 SNR vs Moving Average Oversampling Ratio

ADS9326 ADS9327 DC Input Histogram

Standard deviation = 0.46LSB 
Figure 6-22 DC Input Histogram

ADS9326 ADS9327 DNL vs Temperature

 
Figure 6-24 DNL vs Temperature

ADS9326 ADS9327 Offset Error vs Reference Voltage

 
Figure 6-26 Offset Error vs Reference Voltage

ADS9326 ADS9327 Gain Error vs Temperature

 
Figure 6-28 Gain Error vs Temperature

ADS9326 ADS9327 THD and SFDR vs Temperature

 
Figure 6-30 THD and SFDR vs Temperature

ADS9326 ADS9327 Differential Analog Input Current vs Input Differential Voltage

Refer to INT_BUFFER register field description 
Figure 6-32 Differential Analog Input Current vs Input Differential Voltage

ADS9326 ADS9327 AVDD and VDD_1V8 Current vs Temperature

ADS9327 
Figure 6-34 AVDD and VDD_1V8 Current vs Temperature

ADS9326 ADS9327 IOVDD Current vs Sample Rate

 
Figure 6-36 IOVDD Current vs Sample Rate

ADS9326 ADS9327 AVDD Current vs AVDD Voltage with Low AVDD

2.5V reference 
Figure 6-38 AVDD Current vs AVDD Voltage with Low AVDD

ADS9326 ADS9327 AVDD and VDD_1V8 Power-Down Current vs Temperature

 
Figure 6-40 AVDD and VDD_1V8 Power-Down Current vs Temperature

ADS9326 ADS9327 REF_CAP vs Sample Rate with 2.5V Reference

 
Figure 6-42 REF_CAP vs Sample Rate with 2.5V Reference

ADS9326 ADS9327 REFIO Voltage vs Temperature with 4.096V Reference

Internal 4.096V reference 
Figure 6-44 REFIO Voltage vs Temperature with 4.096V Reference

ADS9326 ADS9327 VCMOUT Voltage vs Reference Voltage

 
Figure 6-46 VCMOUT Voltage vs Reference Voltage

ADS9326 ADS9327 VCMOUT Voltage vs Temperature with 2.5V Reference

2.5V reference 
Figure 6-48 VCMOUT Voltage vs Temperature with 2.5V Reference