SBAS706D April   2015  – April 2019 ADS54J60

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     FFT for 170-MHz Input Signal
  4. 4 Revision History
  5. 5 Device Comparison Table
  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  AC Characteristics
    7. 7.7  Digital Characteristics
    8. 7.8  Timing Requirements
    9. 7.9  Typical Characteristics
    10. 7.10 Typical Characteristics: Contour
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Analog Inputs
      2. 8.3.2 DDC Block
        1. 8.3.2.1 Decimate-by-2 Filter
        2. 8.3.2.2 Decimate-by-4 Filter Using a Digital Mixer
        3. 8.3.2.3 Decimate-by-4 Filter with IQ Outputs
      3. 8.3.3 SYSREF Signal
        1. 8.3.3.1 SYSREF Not Present (Subclass 0, 2)
      4. 8.3.4 Overrange Indication
        1. 8.3.4.1 Fast OVR
      5. 8.3.5 Power-Down Mode
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device Configuration
        1. 8.4.1.1 Serial Interface
        2. 8.4.1.2 Serial Register Write: Analog Bank
        3. 8.4.1.3 Serial Register Readout: Analog Bank
        4. 8.4.1.4 JESD Bank SPI Page Selection
        5. 8.4.1.5 Serial Register Write: JESD Bank
          1. 8.4.1.5.1 Individual Channel Programming
        6. 8.4.1.6 Serial Register Readout: JESD Bank
      2. 8.4.2 JESD204B Interface
        1. 8.4.2.1 JESD204B Initial Lane Alignment (ILA)
        2. 8.4.2.2 JESD204B Test Patterns
        3. 8.4.2.3 JESD204B Frame
        4. 8.4.2.4 JESD204B Frame
        5. 8.4.2.5 JESD204B Frame Assembly with Decimation
          1. 8.4.2.5.1 JESD Transmitter Interface
          2. 8.4.2.5.2 Eye Diagram
    5. 8.5 Register Maps
      1. 8.5.1 Example Register Writes
      2. 8.5.2 Register Descriptions
        1. 8.5.2.1 General Registers
          1. 8.5.2.1.1 Register 0h (address = 0h)
            1. Table 20. Register 0h Field Descriptions
          2. 8.5.2.1.2 Register 1h (address = 1h)
            1. Table 21. Register 1h Field Descriptions
          3. 8.5.2.1.3 Register 2h (address = 2h)
            1. Table 22. Register 2h Field Descriptions
          4. 8.5.2.1.4 Register 3h (address = 3h)
            1. Table 23. Register 3h Field Descriptions
          5. 8.5.2.1.5 Register 4h (address = 4h)
            1. Table 24. Register 4h Field Descriptions
          6. 8.5.2.1.6 Register 5h (address = 5h)
            1. Table 25. Register 5h Field Descriptions
          7. 8.5.2.1.7 Register 11h (address = 11h)
            1. Table 26. Register 11h Field Descriptions
        2. 8.5.2.2 Master Page (080h) Registers
          1. 8.5.2.2.1  Register 20h (address = 20h), Master Page (080h)
            1. Table 27. Registers 20h Field Descriptions
          2. 8.5.2.2.2  Register 21h (address = 21h), Master Page (080h)
            1. Table 28. Register 21h Field Descriptions
          3. 8.5.2.2.3  Register 23h (address = 23h), Master Page (080h)
            1. Table 29. Register 23h Field Descriptions
          4. 8.5.2.2.4  Register 24h (address = 24h), Master Page (080h)
            1. Table 30. Register 24h Field Descriptions
          5. 8.5.2.2.5  Register 26h (address = 26h), Master Page (080h)
            1. Table 31. Register 26h Field Descriptions
          6. 8.5.2.2.6  Register 4Fh (address = 4Fh), Master Page (080h)
            1. Table 32. Register 4Fh Field Descriptions
          7. 8.5.2.2.7  Register 53h (address = 53h), Master Page (080h)
            1. Table 33. Register 53h Field Descriptions
          8. 8.5.2.2.8  Register 54h (address = 54h), Master Page (080h)
            1. Table 34. Register 54h Field Descriptions
          9. 8.5.2.2.9  Register 55h (address = 55h), Master Page (080h)
            1. Table 35. Register 55h Field Descriptions
          10. 8.5.2.2.10 Register 59h (address = 59h), Master Page (080h)
            1. Table 36. Register 59h Field Descriptions
        3. 8.5.2.3 ADC Page (0Fh) Register
          1. 8.5.2.3.1 Register 5F (address = 5F), ADC Page (0Fh)
            1. Table 37. Register 5F Field Descriptions
        4. 8.5.2.4 Main Digital Page (6800h) Registers
          1. 8.5.2.4.1  Register 0h (address = 0h), Main Digital Page (6800h)
            1. Table 38. Register 0h Field Descriptions
          2. 8.5.2.4.2  Register 41h (address = 41h), Main Digital Page (6800h)
            1. Table 39. Register 41h Field Descriptions
          3. 8.5.2.4.3  Register 42h (address = 42h), Main Digital Page (6800h)
            1. Table 41. Register 42h Field Descriptions
          4. 8.5.2.4.4  Register 43h (address = 43h), Main Digital Page (6800h)
            1. Table 42. Register 43h Field Descriptions
          5. 8.5.2.4.5  Register 44h (address = 44h), Main Digital Page (6800h)
            1. Table 43. Register 44h Field Descriptions
          6. 8.5.2.4.6  Register 4Bh (address = 4Bh), Main Digital Page (6800h)
            1. Table 44. Register 4Bh Field Descriptions
          7. 8.5.2.4.7  Register 4Dh (address = 4Dh), Main Digital Page (6800h)
            1. Table 45. Register 4Dh Field Descriptions
          8. 8.5.2.4.8  Register 4Eh (address = 4Eh), Main Digital Page (6800h)
            1. Table 46. Register 4Eh Field Descriptions
          9. 8.5.2.4.9  Register 52h (address = 52h), Main Digital Page (6800h)
            1. Table 47. Register 52h Field Descriptions
          10. 8.5.2.4.10 Register 72h (address = 72h), Main Digital Page (6800h)
            1. Table 48. Register 72h Field Descriptions
          11. 8.5.2.4.11 Register ABh (address = ABh), Main Digital Page (6800h)
            1. Table 49. Register ABh Field Descriptions
          12. 8.5.2.4.12 Register ADh (address = ADh), Main Digital Page (6800h)
            1. Table 50. Register ADh Field Descriptions
          13. 8.5.2.4.13 Register F7h (address = F7h), Main Digital Page (6800h)
            1. Table 51. Register F7h Field Descriptions
        5. 8.5.2.5 JESD Digital Page (6900h) Registers
          1. 8.5.2.5.1  Register 0h (address = 0h), JESD Digital Page (6900h)
            1. Table 52. Register 0h Field Descriptions
          2. 8.5.2.5.2  Register 1h (address = 1h), JESD Digital Page (6900h)
            1. Table 53. Register 1h Field Descriptions
          3. 8.5.2.5.3  Register 2h (address = 2h), JESD Digital Page (6900h)
            1. Table 55. Register 2h Field Descriptions
          4. 8.5.2.5.4  Register 3h (address = 3h), JESD Digital Page (6900h)
            1. Table 56. Register 3h Field Descriptions
          5. 8.5.2.5.5  Register 5h (address = 5h), JESD Digital Page (6900h)
            1. Table 57. Register 5h Field Descriptions
          6. 8.5.2.5.6  Register 6h (address = 6h), JESD Digital Page (6900h)
            1. Table 58. Register 6h Field Descriptions
          7. 8.5.2.5.7  Register 7h (address = 7h), JESD Digital Page (6900h)
            1. Table 59. Register 7h Field Descriptions
          8. 8.5.2.5.8  Register 16h (address = 16h), JESD Digital Page (6900h)
            1. Table 60. Register 16h Field Descriptions
          9. 8.5.2.5.9  Register 31h (address = 31h), JESD Digital Page (6900h)
            1. Table 61. Register 31h Field Descriptions
          10. 8.5.2.5.10 Register 32h (address = 32h), JESD Digital Page (6900h)
            1. Table 62. Register 32h Field Descriptions
        6. 8.5.2.6 JESD Analog Page (6A00h) Registers
          1. 8.5.2.6.1 Register 12h (address = 12h), JESD Analog Page (6A00h)
            1. Table 63. Register 12h-15h Field Descriptions
          2. 8.5.2.6.2 Registers 13h-15h (address = 13h-15h), JESD Analog Page (6A00h)
            1. Table 64. Register 13h-15h Field Descriptions
          3. 8.5.2.6.3 Register 16h (address = 16h), JESD Analog Page (6A00h)
            1. Table 65. Register 16h Field Descriptions
          4. 8.5.2.6.4 Register 17h (address = 17h), JESD Analog Page (6A00h)
            1. Table 66. Register 17h Field Descriptions
          5. 8.5.2.6.5 Register 1Ah (address = 1Ah), JESD Analog Page (6A00h)
            1. Table 67. Register 1Ah Field Descriptions
          6. 8.5.2.6.6 Register 1Bh (address = 1Bh), JESD Analog Page (6A00h)
            1. Table 68. Register 1Bh Field Descriptions
        7. 8.5.2.7 Offset Read Page (JESD BANK PAGE SEL = 6100h, JESD BANK PAGE SEL1 = 0000h) Registers
          1. 8.5.2.7.1 Register 068h (address = 068h), Offset Read Page
            1. Table 69. Register 068h Field Descriptions
          2. 8.5.2.7.2 Register 069h (address = 069h), Offset Read Page
            1. Table 70. Register 069h Field Descriptions
          3. 8.5.2.7.3 Registers 074h, 076h, 078h, 7Ah (address = 074h, 076h, 078h, 7Ah), Offset Read Page
            1. Table 71. Registers 074h, 076h, 078h, 7Ah Field Descriptions
          4. 8.5.2.7.4 Registers 075h, 077h, 079h, 7Bh (address = 075h, 077h, 079h, 7Bh), Offset Read Page
            1. Table 72. Registers 075h, 077h, 079h, 7Bh Field Descriptions
        8. 8.5.2.8 Offset Load Page (JESD BANK PAGE SEL= 6100h, JESD BANK PAGE SEL1 = 0500h) Registers
          1. 8.5.2.8.1 Registers 00h, 04h, 08h, 0Ch (address = 00h, 04h, 08h, 0Ch), Offset Load Page
            1. Table 73. Registers 00h, 04h, 08h, 0Ch Field Descriptions
          2. 8.5.2.8.2 Registers 01h, 05h, 09h, 0Dh (address = 01h, 05h, 09h, 0Dh), Offset Load Page
            1. Table 74. Registers 01h, 05h, 09h, 0Dh Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Start-Up Sequence
      2. 9.1.2 Hardware Reset
      3. 9.1.3 SNR and Clock Jitter
      4. 9.1.4 DC Offset Correction Block in the ADS54J60
        1. 9.1.4.1 Freezing the DC Offset Correction Block
        2. 9.1.4.2 Effect of Temperature
      5. 9.1.5 Idle Channel Histogram
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Transformer-Coupled Circuits
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power Sequencing and Initialization
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.1.4.2 Effect of Temperature

The internal dc offset of the individual cores changes with temperature, resulting in fS / 4 and fS / 2 spurs appearing again in the spectrum at a different temperature.

Figure 144 shows a variation of the fS / 4 spur over temperature for a typical device.

ADS54J60 D068_SBAS706.gif

NOTE:

The offset correction block was frozen at room temperature, then the temperature was varied from –40°C to +85°C.
Figure 144. Variation of the fS / 4 Spur Over Temperature

Although some systems can accept such a variation in the fS / 4 and fS / 2 spurs across temperature, other systems may require the internal dc offset profile to be calibrated with temperature. To achieve this calibration, the device provides an option to read the internal estimate values from the correction block for each of the interleaving cores and also to load the values back to the correction block. For calibration, after power up, a temperature sweep can be performed with the idle channel input and the internal dc offset can be read back using the ADCx_CORR_INT_EST register bits for salient temperature points. Then during operation, when temperature changes, the corresponding estimates can be externally loaded to the correction block using the ADCx_LOAD_EXT_EST register bits.

The dc offset corrector block is enabled by default. For a given channel, the device can disable and freeze the block, read the estimate of the block, and load the external estimate.

Table 77 lists an example of required SPI writes for reading an internal estimate of the dc offset correction block, and then loading the estimate back to the corrector.

Table 77. Format (16-Bit Address, 8-Bit Data)

STEP ADDRESS (Hex)(1) DATA (Hex) COMMENT
Reading an internal estimate from both channels 4-005 01 This setting disables broadcast mode (channel A and B can be individually programmed)
4-004 61 Selects offset read page (61000000h)
4-003 00
4-002 00
4-001 00
Data from the offset read page can be read as below (keep the R/W bit = 1)
E-074 xx Reading the internal estimate [7:0] for core 0, channel A on the SDOUT pin
E-075 xx Reading the internal estimate [10:8] for core 0, channel A on the SDOUT pin
E-076 xx Reading the internal estimate [7:0] for core 1, channel A on the SDOUT pin
E-077 xx Reading the internal estimate [10:8] for core 1, channel A on the SDOUT pin
E-078 xx Reading the internal estimate [7:0] for core 2, channel A on the SDOUT pin
E-079 xx Reading the internal estimate [10:8] for core 2, channel A on the SDOUT pin
E-07A xx Reading the internal estimate [7:0] for core 3, channel A on the SDOUT pin
E-07B xx Reading the internal estimate [10:8] for core 3, channel A on the SDOUT pin
F-074 xx Reading the internal estimate [7:0] for core 0, channel B on the SDOUT pin
F-075 xx Reading the internal estimate [10:8] for core 0, channel B on the SDOUT pin
F-076 xx Reading the internal estimate [7:0] for core 1, channel B on the SDOUT pin
F-077 xx Reading the internal estimate [10:8] for core 1, channel B on the SDOUT pin
F-078 xx Reading the internal estimate [7:0] for core 2, channel B on the SDOUT pin
F-079 xx Reading the internal estimate [10:8] for core 2, channel B on the SDOUT pin
F-07A xx Reading the internal estimate [7:0] for core 3, channel B on the SDOUT pin
F-07B xx Reading the internal estimate [10:8] for core 3, channel B on the SDOUT pin
Loading an external estimate to both channels 6-069 01 Enables the external correction bit located in the offset read page for channel A
7-069 01 Enables the external correction bit located in the offset read page for channel B
4-004 61 Change page to offset load page (61000500h)
4-003 00
4-002 05
4-001 00
6-000 xx Loading the external estimate [7:0] for core 0, channel A through SPI writes
6-001 xx Loading the external estimate [10:8] for core 0, channel A through SPI writes
6-004 xx Loading the external estimate [7:0] for core 1, channel A through SPI writes
6-005 xx Loading the external estimate [10:8] for core 1, channel A through SPI writes
6-008 xx Loading the external estimate [7:0] for core 2, channel A through SPI writes
6-009 xx Loading the external estimate [10:8] for core 2, channel A through SPI writes
6-00C xx Loading the external estimate [7:0] for core 3, channel A through SPI writes
6-00D xx Loading the external estimate [10:8] for core 3, channel A through SPI writes
7-000 xx Loading the external estimate [7:0] for core 0, channel B through SPI writes
7-001 xx Loading the external estimate [10:8] for core 0, channel B through SPI writes
7-004 xx Loading the external estimate [7:0] for core 1, channel B through SPI writes
7-005 xx Loading the external estimate [10:8] for core 1, channel B through SPI writes
7-008 xx Loading the external estimate [7:0] for core 2, channel B through SPI writes
7-009 xx Loading the external estimate [10:8] for core 2, channel B through SPI writes
7-00C xx Loading the external estimate [7:0] for core 3, channel B through SPI writes
7-00D xx Loading the external estimate [10:8] for core 3, channel B through SPI writes
(1) The address field is represented in four hex bits in a-bcd format, where a contains information about the R/W, M, P, and CH bits, and bcd contain the actual address of the register.