SBASAM0B March   2024  – November 2024 ADS127L18

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Switching Characteristics
    8. 5.8 Timing Diagrams
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1  Offset Error Measurement
    2. 6.2  Offset Drift Measurement
    3. 6.3  Gain Error Measurement
    4. 6.4  Gain Drift Measurement
    5. 6.5  NMRR Measurement
    6. 6.6  CMRR Measurement
    7. 6.7  PSRR Measurement
    8. 6.8  SNR Measurement
    9. 6.9  INL Error Measurement
    10. 6.10 THD Measurement
    11. 6.11 IMD Measurement
    12. 6.12 SFDR Measurement
    13. 6.13 Noise Performance
  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 (AINP, AINN)
        1. 7.3.1.1 Input Range
      2. 7.3.2 Reference Voltage (REFP, REFN)
        1. 7.3.2.1 Reference Voltage Range
      3. 7.3.3 Clock Operation
        1. 7.3.3.1 Clock Dividers
        2. 7.3.3.2 Internal Oscillator
        3. 7.3.3.3 External Clock
      4. 7.3.4 Power-On Reset (POR)
      5. 7.3.5 VCM Output Voltage
      6. 7.3.6 GPIO
      7. 7.3.7 Modulator
      8. 7.3.8 Digital Filter
        1. 7.3.8.1 Wideband Filter
        2. 7.3.8.2 Low-Latency Filter (Sinc)
          1. 7.3.8.2.1 Sinc4 Filter
          2. 7.3.8.2.2 Sinc4 + Sinc1 Cascade Filter
          3. 7.3.8.2.3 Sinc3 Filter
          4. 7.3.8.2.4 Sinc3 + Sinc1 Filter
    4. 7.4 Device Functional Modes
      1. 7.4.1  Reset
        1. 7.4.1.1 RESET Pin
        2. 7.4.1.2 Reset by SPI Register
        3. 7.4.1.3 Reset by SPI Input Pattern
      2. 7.4.2  Idle and Standby Modes
      3. 7.4.3  Power-Down
      4. 7.4.4  Speed Modes
      5. 7.4.5  Synchronization
        1. 7.4.5.1 Synchronized Control Mode
        2. 7.4.5.2 Start/Stop Control Mode
      6. 7.4.6  Conversion-Start Delay Time
      7. 7.4.7  Calibration
        1. 7.4.7.1 Offset Calibration Registers
        2. 7.4.7.2 Gain Calibration Registers
        3. 7.4.7.3 Calibration Procedure
      8. 7.4.8  Data Averaging
      9. 7.4.9  Diagnostics
        1. 7.4.9.1 ERROR Pin and ERR_FLAG Bit
        2. 7.4.9.2 SPI CRC
        3. 7.4.9.3 Register Map CRC
        4. 7.4.9.4 ADC Error
        5. 7.4.9.5 SPI Address Range
        6. 7.4.9.6 SCLK Counter
        7. 7.4.9.7 Clock Counter
        8. 7.4.9.8 Frame-Sync CRC
        9. 7.4.9.9 Self Test
      10. 7.4.10 Frame-Sync Data Port
        1. 7.4.10.1  Data Packet
        2. 7.4.10.2  Data Format
        3. 7.4.10.3  STATUS_DP Header Byte
        4. 7.4.10.4  FSYNC Pin
        5. 7.4.10.5  DCLK Pin
        6. 7.4.10.6  DOUTx Pins
        7. 7.4.10.7  DINx Pins
        8. 7.4.10.8  Time Division Multiplexing
        9. 7.4.10.9  Daisy Chain
        10. 7.4.10.10 DOUTx Timing
    5. 7.5 Programming
      1. 7.5.1 Hardware Programming
      2. 7.5.2 SPI Programming
        1. 7.5.2.1 Chip Select (CS)
        2. 7.5.2.2 Serial Clock (SCLK)
        3. 7.5.2.3 Serial Data Input (SDI)
        4. 7.5.2.4 Serial Data Output (SDO)
      3. 7.5.3 SPI Frame
      4. 7.5.4 Commands
        1. 7.5.4.1 Write Register Command
        2. 7.5.4.2 Read Register Command
      5. 7.5.5 SPI Daisy-Chain
  9. 8 Register Map
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Input Driver
      2. 9.1.2 Antialias Filter
      3. 9.1.3 Reference Voltage
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 AVDD1 and AVSS
      2. 9.3.2 AVDD2
      3. 9.3.3 IOVDD
      4. 9.3.4 CAPA and CAPD
    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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.9 Typical Characteristics

AVDD1 = AVDD2 = 5V, AVSS = 0V, IOVDD = 1.8V, VREF = 4.096V, high-reference range, high-speed mode, wideband filter, OSR = 32, 1x input range, input precharge buffers on, reference precharge buffer off, and TA = 25°C. Data represent typical channel performance (unless otherwise noted).

ADS127L14 ADS127L18 Max-Speed Mode, Shorted FFT
Wideband filter (262,144 samples)
Figure 5-8 Max-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Max-Speed Mode, Shorted FFT
Wideband filter, VREF = 2.5V, 2x range (262,144 samples)
Figure 5-10 Max-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Max-Speed Mode, Full-Scale FFT
Fundamental = –0.2dBFS, 1kHz (262,144 samples)
Figure 5-12 Max-Speed Mode, Full-Scale FFT
ADS127L14 ADS127L18 High-Speed Mode, Shorted FFT
Wideband filter (262,144 samples)
Figure 5-14 High-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 High-Speed Mode, Shorted FFT
VREF = 2.5V, 2x range, wideband filter (262,144 samples)
Figure 5-16 High-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 High-Speed Mode, Full-Scale FFT
Fundamental = –0.2dBFS, 1kHz (262,144 samples)
Figure 5-18 High-Speed Mode, Full-Scale FFT
ADS127L14 ADS127L18 Mid-Speed Mode, Shorted FFT
Wideband filter (131,072 samples)
Figure 5-20 Mid-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Mid-Speed Mode, Shorted FFT
VREF = 2.5V, 2x range, Wideband filter (131,072 samples)
Figure 5-22 Mid-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Mid-Speed Mode, Full-Scale FFT
Fundamental = –0.2dBFS, 1kHz (262,144 samples)
Figure 5-24 Mid-Speed Mode, Full-Scale FFT
ADS127L14 ADS127L18 Low-Speed Mode, Shorted FFT
Wideband filter (32,768 samples)
Figure 5-26 Low-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Low-Speed Mode, Shorted FFT
VREF = 2.5V, 2x range, wideband filter (32,768 samples)
Figure 5-28 Low-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Low-Speed Mode, Full-Scale FFT
Fundamental = –0.2dBFS, 1kHz (65,536 samples)
Figure 5-30 Low-Speed Mode, Full-Scale FFT
ADS127L14 ADS127L18 Integrated Noise Histogram
Wideband filter, OSR = 64, 30 units
Figure 5-32 Integrated Noise Histogram
ADS127L14 ADS127L18 Integrated Noise vs. Temperature
Wideband filter, OSR = 64
Figure 5-34 Integrated Noise vs. Temperature
ADS127L14 ADS127L18 Dynamic Range Histogram
OSR = 64, 30 units
Figure 5-36 Dynamic Range Histogram
ADS127L14 ADS127L18 Integrated Noise vs. VREF
Wideband filter, OSR = 64
Figure 5-38 Integrated Noise vs. VREF
ADS127L14 ADS127L18 Offset Voltage Drift Histograms
30 units
Figure 5-40 Offset Voltage Drift Histograms
ADS127L14 ADS127L18 Gain Error Histograms
Input buffers OFF, 30 units
Figure 5-42 Gain Error Histograms
ADS127L14 ADS127L18 Gain Drift Histograms
Input buffers OFF 30 units
Figure 5-44 Gain Drift Histograms
ADS127L14 ADS127L18 THD Histogram
VREF = 2.5V, 30 units
Figure 5-46 THD Histogram
ADS127L14 ADS127L18 THD Histogram
VREF = 2.5V, 30 units
Figure 5-48 THD Histogram
ADS127L14 ADS127L18 THD vs. Signal Amplitude
Figure 5-50 THD vs. Signal Amplitude
ADS127L14 ADS127L18 IMD FFT
High-speed mode, OSR = 64
Figure 5-52 IMD FFT
ADS127L14 ADS127L18 INL vs. Input Voltage
VREF = 2.5V, 2x input range
Figure 5-54 INL vs. Input Voltage
ADS127L14 ADS127L18 CMRR vs. Frequency
Sinc4 filter
Figure 5-56 CMRR vs. Frequency
ADS127L14 ADS127L18 Input Current vs. Input Voltage
Input buffers ON
Figure 5-58 Input Current vs. Input Voltage
ADS127L14 ADS127L18 Input Current vs. Temperature
Input buffers ON
Figure 5-60 Input Current vs. Temperature
ADS127L14 ADS127L18 REFP Input Current vs. Reference Voltage
ADS127L18, REFP buffer ON
Figure 5-62 REFP Input Current vs. Reference Voltage
ADS127L14 ADS127L18 VCM Output Voltage Histogram
30 units
Figure 5-64 VCM Output Voltage Histogram
ADS127L14 ADS127L18 Max-Speed Mode Power Supply Currents vs. Temperature
Input and reference buffers ON
Figure 5-66 Max-Speed Mode Power Supply Currents vs. Temperature
ADS127L14 ADS127L18 Mid-Speed Mode Power Supply Currents vs. Temperature
Input and reference buffers ON
Figure 5-68 Mid-Speed Mode Power Supply Currents vs. Temperature
ADS127L14 ADS127L18 ADS127L14 IOVDD Current vs. Temperature
Wideband filter
Figure 5-70 ADS127L14 IOVDD Current vs. Temperature
ADS127L14 ADS127L18 ADS127L18 IOVDD Current vs. Temperature
Wideband filter
Figure 5-72 ADS127L18 IOVDD Current vs. Temperature
ADS127L14 ADS127L18 Max-Speed Mode, Shorted FFT
0 - 100Hz, wideband filter (262,144 samples)
Figure 5-9 Max-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Max-Speed Mode, Shorted FFT
Sinc4 filter (262,144 samples)
Figure 5-11 Max-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Max-Speed Mode, Shorted Noise Histogram
OSR = 64 (262,144 samples)
Figure 5-13 Max-Speed Mode, Shorted Noise Histogram
ADS127L14 ADS127L18 High-Speed Mode, Shorted FFT
0 - 100Hz, wideband filter (262,144 samples)
Figure 5-15 High-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 High-Speed Mode, Shorted FFT
Sinc4 filter (262,144 samples)
Figure 5-17 High-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 High-Speed Mode, Shorted Noise Histogram
OSR = 64 (262,144 samples)
Figure 5-19 High-Speed Mode, Shorted Noise Histogram
ADS127L14 ADS127L18 Mid-Speed Mode, Shorted FFT
0 - 100Hz, wideband filter (131,072 samples)
Figure 5-21 Mid-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Mid-Speed Mode, Shorted FFT
Sinc4 filter (131,072 samples)
Figure 5-23 Mid-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Mid-Speed Mode, Shorted Noise Histogram
OSR = 64 (262,144 samples)
Figure 5-25 Mid-Speed Mode, Shorted Noise Histogram
ADS127L14 ADS127L18 Low-Speed Mode, Shorted FFT
0 - 100Hz, wideband filter (32,768 samples)
Figure 5-27 Low-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Low-Speed Mode, Shorted FFT
Sinc4 filter (32,768 samples)
Figure 5-29 Low-Speed Mode, Shorted FFT
ADS127L14 ADS127L18 Low-Speed Mode, Shorted Noise Histogram
OSR = 64 (262,144 samples)
Figure 5-31 Low-Speed Mode, Shorted Noise Histogram
ADS127L14 ADS127L18 Integrated Noise Histogram
Sinc4 filter, OSR = 64, 30 units
Figure 5-33 Integrated Noise Histogram
ADS127L14 ADS127L18 Integrated Noise vs. Temperature
Sinc4 filter, OSR = 64
Figure 5-35 Integrated Noise vs. Temperature
ADS127L14 ADS127L18 Dynamic Range Histogram
OSR = 64, 30 units
Figure 5-37 Dynamic Range Histogram
ADS127L14 ADS127L18 Offset Voltage Histograms
30 units
Figure 5-39 Offset Voltage Histograms
ADS127L14 ADS127L18 Gain Error Histograms
Input buffers ON, 30 units
Figure 5-41 Gain Error Histograms
ADS127L14 ADS127L18 Gain Drift Histograms
Input buffers ON, 30 units
Figure 5-43 Gain Drift Histograms
ADS127L14 ADS127L18 Gain Error vs. Clock Frequency
High-speed mode, gain error normalized at 25.6MHz
Figure 5-45 Gain Error vs. Clock Frequency
ADS127L14 ADS127L18 THD Histogram
VREF = 4.096V, 30 units
Figure 5-47 THD Histogram
ADS127L14 ADS127L18 THD Histogram
VREF = 4.096V, 30 units
Figure 5-49 THD Histogram
ADS127L14 ADS127L18 THD vs. Temperature
Figure 5-51 THD vs. Temperature
ADS127L14 ADS127L18 INL vs. Input Voltage
VREF = 4.096V, 1x input range
Figure 5-53 INL vs. Input Voltage
ADS127L14 ADS127L18 INL Histograms
Figure 5-55 INL Histograms
ADS127L14 ADS127L18 Input Current vs. Input Voltage
Input buffers OFF
Figure 5-57 Input Current vs. Input Voltage
ADS127L14 ADS127L18 Input Current vs. Temperature
VIN = 2.5V, input buffers OFF
Figure 5-59 Input Current vs. Temperature
ADS127L14 ADS127L18 REFP Input Current vs. Reference Voltage
ADS127L18, REFP buffer OFF
Figure 5-61 REFP Input Current vs. Reference Voltage
ADS127L14 ADS127L18 Oscillator Frequency Histogram
30 units
Figure 5-63 Oscillator Frequency Histogram
ADS127L14 ADS127L18 PSRR vs. Power Supply Frequency
High-speed mode, sinc4 filter
Figure 5-65 PSRR vs. Power Supply Frequency
ADS127L14 ADS127L18 High-Speed Mode Power Supply Currents vs. Temperature
Input and reference buffers ON
Figure 5-67 High-Speed Mode Power Supply Currents vs. Temperature
ADS127L14 ADS127L18 Low-Speed Mode Power Supply Currents vs. Temperature
Input and reference buffers ON
Figure 5-69 Low-Speed Mode Power Supply Currents vs. Temperature
ADS127L14 ADS127L18 ADS127L14 IOVDD Current vs. Temperature
Sinc4 filter
Figure 5-71 ADS127L14 IOVDD Current vs. Temperature
ADS127L14 ADS127L18 ADS127L18 IOVDD Current vs. Temperature
Sinc4 filter
Figure 5-73 ADS127L18 IOVDD Current vs. Temperature