SBAS937B September   2018  – December 2018 ADS1278-SP

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements: SPI Format
    7. 7.7 Timing Requirements: Frame-Sync Format
    8. 7.8 Quality Conformance Inspection
    9. 7.9 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Sampling Aperture Matching
      2. 8.3.2  Frequency Response
        1. 8.3.2.1 High-Speed, Low-Power, And Low-Speed Modes
        2. 8.3.2.2 High-Resolution Mode
      3. 8.3.3  Phase Response
      4. 8.3.4  Settling Time
      5. 8.3.5  Data Format
      6. 8.3.6  Analog Inputs (AINP, AINN)
      7. 8.3.7  Voltage Reference Inputs (VREFP, VREFN)
      8. 8.3.8  Clock Input (CLK)
      9. 8.3.9  Mode Selection (MODE)
      10. 8.3.10 Synchronization (SYNC)
      11. 8.3.11 Power-Down (PWDN)
      12. 8.3.12 Format[2:0]
      13. 8.3.13 Serial Interface Protocols
      14. 8.3.14 SPI Serial Interface
        1. 8.3.14.1 SCLK
        2. 8.3.14.2 DRDY/FSYNC (SPI Format)
        3. 8.3.14.3 DOUT
        4. 8.3.14.4 DIN
      15. 8.3.15 Frame-Sync Serial Interface
        1. 8.3.15.1 SCLK
        2. 8.3.15.2 DRDY/FSYNC (Frame-Sync Format)
        3. 8.3.15.3 DOUT
        4. 8.3.15.4 DIN
      16. 8.3.16 DOUT Modes
        1. 8.3.16.1 TDM Mode
        2. 8.3.16.2 TDM Mode, Fixed-Position Data
        3. 8.3.16.3 TDM Mode, Dynamic Position Data
        4. 8.3.16.4 Discrete Data Output Mode
      17. 8.3.17 Daisy-Chaining
      18. 8.3.18 Modulator Output
      19. 8.3.19 Pin Test Using Test[1:0] Inputs
      20. 8.3.20 VCOM Output
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.9 Typical Characteristics

At TA = 25°C, High-Speed mode, AVDD = 5 V, DVDD = 1.8 V, IOVDD = 3.3 V, fCLK = 27 MHz, VREFP = 2.5 V,
and VREFN = 0 V, unless otherwise noted.
ADS1278-SP tc_fft_hs_05db_bas367.gif
Figure 3. Output Spectrum
ADS1278-SP tc_fft_hs_short_bas367.gif
Figure 5. Output Spectrum
ADS1278-SP tc_fft_hr_05db_bas367.gif
Figure 7. Output Spectrum
ADS1278-SP tc_fft_hr_short_bas367.gif
Figure 9. Output Spectrum
ADS1278-SP tc_fft_lp_05db_bas367.gif
Figure 11. Output Spectrum
ADS1278-SP tc_fft_lp_short_bas367.gif
Figure 13. Output Spectrum
ADS1278-SP tc_fft_ls_05db_bas367.gif
Figure 15. Output Spectrum
ADS1278-SP tc_fft_ls_short_bas367.gif
Figure 17. Output Spectrum
ADS1278-SP tc_thd-freq_hs_bas367.gif
Figure 19. Total Harmonic Distortion vs Frequency
ADS1278-SP tc_thd-freq_hr_bas367.gif
Figure 21. Total Harmonic Distortion vs Frequency
ADS1278-SP tc_thd-freq_lp_bas367.gif
Figure 23. Total Harmonic Distortion vs Frequency
ADS1278-SP tc_thd-freq_ls_bas367.gif
Figure 25. Total Harmonic Distortion vs Frequency
ADS1278-SP tc_hist_offset_dft_bas367.gif
Figure 27. Offset Drift Histogram
ADS1278-SP tc_offset_warmup_bas367.gif
Figure 29. Offset Warmup Drift Response Band
ADS1278-SP tc_hist_offset_err_bas367.gif
Figure 31. Offset Error Histogram
ADS1278-SP tc_hist_gain_match_bas367.gif
Figure 33. Channel Gain Match Histogram
ADS1278-SP off_gain_bas447.gif
Figure 35. Offset and Gain vs Temperature
ADS1278-SP tc_hist_samp_match_bas367.gif
Figure 37. Sampling Match Error Histogram
ADS1278-SP analog_ip_bas447.gif
Figure 39. Analog Input Differential Impedance vs Temperature
ADS1278-SP INL_t_bas447.gif
Figure 41. Integral Nonlinearity vs Temperature
ADS1278-SP tc_lin_thd-vref_bas367.gif
Figure 43. Linearity and Total Harmonic Distortion vs Reference Voltage
ADS1278-SP Noise_t_bas447.gif
Figure 45. Noise vs Temperature
ADS1278-SP tc_thd_noise-clk_bas367.gif
Figure 47. Total Harmonic Distortion and Noise vs CLK
ADS1278-SP tc_psr-freq_bas367.gif
Figure 49. Power-Supply Rejection vs Power-Supply Frequency
ADS1278-SP DVDD_t_bas447.gif
Figure 51. DVDD Current vs Temperature
ADS1278-SP PD_t_bas447.gif
Figure 53. Power Dissipation vs Temperature
ADS1278-SP tc_fft_hs_20db_bas367.gif
Figure 4. Output Spectrum
ADS1278-SP tc_hist_hs_bas367.gif
Figure 6. Noise Histogram
ADS1278-SP tc_fft_hr_20db_bas367.gif
Figure 8. Output Spectrum
ADS1278-SP tc_hist_hr_bas367.gif
Figure 10. Noise Histogram
ADS1278-SP tc_fft_lp_20db_bas367.gif
Figure 12. Output Spectrum
ADS1278-SP tc_hist_lp_bas367.gif
Figure 14. Noise Histogram
ADS1278-SP tc_fft_ls_20db_bas367.gif
Figure 16. Output Spectrum
ADS1278-SP tc_hist_ls_bas367.gif
Figure 18. Noise Histogram
ADS1278-SP tc_thd-amp_hs_bas367.gif
Figure 20. Total Harmonic Distortion vs Input Amplitude
ADS1278-SP tc_thd-amp_hr_bas367.gif
Figure 22. Total Harmonic Distortion vs Input Amplitude
ADS1278-SP tc_thd-amp_lp_bas367.gif
Figure 24. Total Harmonic Distortion vs Input Amplitude
ADS1278-SP tc_thd-amp_ls_bas367.gif
Figure 26. Total Harmonic Distortion vs Input Amplitude
ADS1278-SP tc_hist_gain_dft_bas367.gif
Figure 28. Gain Drift Histogram
ADS1278-SP tc_gain_warmup_bas367.gif
Figure 30. Gain Warmup Drift Response Band
ADS1278-SP tc_hist_gain_err_bas367.gif
Figure 32. Gain Error Histogram
ADS1278-SP tc_hist_offs_match_bas367.gif
Figure 34. Channel Offset Match Histogram
ADS1278-SP tc_hist_vcom_bas367.gif
Figure 36. VCOM Voltage Output Histogram
ADS1278-SP ref_ip_t_bas447.gif
Figure 38. Reference Input Differential Impedance vs Temperature
ADS1278-SP analog2_ip_bas447.gif
Figure 40. Analog Input Differential Impedance vs Temperature
ADS1278-SP tc_le-input_level_bas367.gif
Figure 42. Linearity Error vs Input Level
ADS1278-SP tc_noise_lin-vcm_bas367.gif
Figure 44. Noise and Linearity vs Input Common-Mode Voltage
ADS1278-SP tc_noise-vref_bas367.gif
Figure 46. Noise vs Reference Voltage
ADS1278-SP tc_cmr-fin_bas367.gif
Figure 48. Common-Mode Rejection vs Input Frequency
ADS1278-SP AVDD_t_bas447.gif
Figure 50. AVDD Current vs Temperature
ADS1278-SP IOVDD_t_bas447.gif
Figure 52. IOVDD Current vs Temperature