SBAS766B May   2016  – January 2017 ADS54J20

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and 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 Characteristics
    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 Diagrams
    5. 8.5 Register Maps
      1. 8.5.1 Detailed Register Information
      2. 8.5.2 Example Register Writes
      3. 8.5.3 Register Descriptions
        1. 8.5.3.1 General Registers
          1. 8.5.3.1.1 Register 0h (address = 0h)
          2. 8.5.3.1.2 Register 3h (address = 3h)
          3. 8.5.3.1.3 Register 4h (address = 4h)
          4. 8.5.3.1.4 Register 5h (address = 5h)
          5. 8.5.3.1.5 Register 11h (address = 11h)
        2. 8.5.3.2 Master Page (080h) Registers
          1. 8.5.3.2.1  Register 20h (address = 20h), Master Page (080h)
          2. 8.5.3.2.2  Register 21h (address = 21h), Master Page (080h)
          3. 8.5.3.2.3  Register 23h (address = 23h), Master Page (080h)
          4. 8.5.3.2.4  Register 24h (address = 24h), Master Page (080h)
          5. 8.5.3.2.5  Register 26h (address = 26h), Master Page (080h)
          6. 8.5.3.2.6  Register 4Fh (address = 4Fh), Master Page (080h)
          7. 8.5.3.2.7  Register 53h (address = 53h), Master Page (080h)
          8. 8.5.3.2.8  Register 54h (address = 54h), Master Page (080h)
          9. 8.5.3.2.9  Register 55h (address = 55h), Master Page (080h)
          10. 8.5.3.2.10 Register 59h (address = 59h), Master Page (080h)
        3. 8.5.3.3 ADC Page (0Fh) Register
          1. 8.5.3.3.1 Register 5F (addresses = 5F), ADC Page (0Fh)
        4. 8.5.3.4 Main Digital Page (6800h) Registers
          1. 8.5.3.4.1  Register 0h (address = 0h), Main Digital Page (6800h)
          2. 8.5.3.4.2  Register 41h (address = 41h), Main Digital Page (6800h)
          3. 8.5.3.4.3  Register 42h (address = 42h), Main Digital Page (6800h)
          4. 8.5.3.4.4  Register 43h (address = 43h), Main Digital Page (6800h)
          5. 8.5.3.4.5  Register 44h (address = 44h), Main Digital Page (6800h)
          6. 8.5.3.4.6  Register 4Bh (address = 4Bh), Main Digital Page (6800h)
          7. 8.5.3.4.7  Register 4Dh (address = 4Dh), Main Digital Page (6800h)
          8. 8.5.3.4.8  Register 4Eh (address = 4Eh), Main Digital Page (6800h)
          9. 8.5.3.4.9  Register 52h (address = 52h), Main Digital Page (6800h)
          10. 8.5.3.4.10 Register 72h (address = 72h), Main Digital Page (6800h)
          11. 8.5.3.4.11 Register ABh (address = ABh), Main Digital Page (6800h)
          12. 8.5.3.4.12 Register ADh (address = ADh), Main Digital Page (6800h)
          13. 8.5.3.4.13 Register F7h (address = F7h), Main Digital Page (6800h)
        5. 8.5.3.5 JESD Digital Page (6900h) Registers
          1. 8.5.3.5.1  Register 0h (address = 0h), JESD Digital Page (6900h)
          2. 8.5.3.5.2  Register 1h (address = 1h), JESD Digital Page (6900h)
          3. 8.5.3.5.3  Register 2h (address = 2h), JESD Digital Page (6900h)
          4. 8.5.3.5.4  Register 3h (address = 3h), JESD Digital Page (6900h)
          5. 8.5.3.5.5  Register 5h (address = 5h), JESD Digital Page (6900h)
          6. 8.5.3.5.6  Register 6h (address = 6h), JESD Digital Page (6900h)
          7. 8.5.3.5.7  Register 7h (address = 7h), JESD Digital Page (6900h)
          8. 8.5.3.5.8  Register 16h (address = 16h), JESD Digital Page (6900h)
          9. 8.5.3.5.9  Register 31h (address = 31h), JESD Digital Page (6900h)
          10. 8.5.3.5.10 Register 32h (address = 32h), JESD Digital Page (6900h)
        6. 8.5.3.6 JESD Analog Page (6A00h) Registers
          1. 8.5.3.6.1 Registers 12h-5h (addresses = 12h-5h), JESD Analog Page (6A00h)
          2. 8.5.3.6.2 Register 16h (address = 16h), JESD Analog Page (6A00h)
          3. 8.5.3.6.3 Register 17h (address = 17h), JESD Analog Page (6A00h)
          4. 8.5.3.6.4 Register 1Ah (address = 1Ah), JESD Analog Page (6A00h)
          5. 8.5.3.6.5 Register 1Bh (address = 1Bh), JESD Analog Page (6A00h)
  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
    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. 13 Mechanical, Packaging, and Orderable Information

Package Options

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

10 Power Supply Recommendations

The device requires a 1.15-V nominal supply for IOVDD, a 1.9-V nominal supply for DVDD, a 1.9-V nominal supply for AVDD, and a 3.0-V nominal supply for AVDD3V. For detailed information regarding the operating voltage minimum and maximum specifications of different supplies, see the Recommended Operating Conditions table.

10.1 Power Sequencing and Initialization

Figure 138 shows the suggested power-up sequencing for the device. Note that the 1.15-V IOVDD supply must rise before the 1.9-V DVDD supply. If the 1.9-V DVDD supply rises before the 1.15-V IOVDD supply, then the internal default register settings may not load properly. The other supplies (the 3-V AVDD3V and the 1.9-V AVDD), can come up in any order during the power sequence. The power supplies can ramp up at any rate and there is no hard requirement for the time delay between IOVDD ramp up to DVDD ramp-up (can be in orders of microseconds but is recommend to be a few milliseconds).

ADS54J20 power_seq_sbas706.gif Figure 138. Power Sequencing for the ADS54Jxx Family of Devices