SBAS659 November   2014 ADS58J89

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  Handling Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Electrical Characteristics: 250 MSPS Output, 2x Decimation Filter
    7. 6.7  Electrical Characteristics: 500 MSPS Output
    8. 6.8  Electrical Characteristics: Sample Clock Timing Characteristics
    9. 6.9  Electrical Characteristics: Digital Outputs
    10. 6.10 Timing Requirements
    11. 6.11 Reset Timing
    12. 6.12 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Decimation by 2 (250 MSPS Output)
      2. 7.3.2  Over-Range Indication
      3. 7.3.3  JESD204B Interface
        1. 7.3.3.1 JESD204B Initial Lane Alignment (ILA)
        2. 7.3.3.2 JESD204B Test Patterns
        3. 7.3.3.3 JESD204B Frame Assembly
      4. 7.3.4  SYSREF Clocking Schemes
      5. 7.3.5  Split-Mode Operation
      6. 7.3.6  Eye Diagram Information
      7. 7.3.7  Analog Inputs
      8. 7.3.8  Clock Inputs
      9. 7.3.9  Input Clock Divider
      10. 7.3.10 Power-Down Control
      11. 7.3.11 Device Configuration
      12. 7.3.12 JESD204B Interface Initialization Sequence
      13. 7.3.13 Device and Register Initialization
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operating Modes
      2. 7.4.2 Mode Configuration
      3. 7.4.3 Output Format
      4. 7.4.4 Burst Mode of Every Other Sample (250 MSPS Output)
      5. 7.4.5 SNR Boost (500 MSPS Output)
      6. 7.4.6 Burst Mode
        1. 7.4.6.1 Burst Mode Counters
        2. 7.4.6.2 Burst Mode
        3. 7.4.6.3 TDD Burst Mode
        4. 7.4.6.4 Trigger Input
        5. 7.4.6.5 Manual Trigger Mode
        6. 7.4.6.6 Auto Trigger Mode
        7. 7.4.6.7 TDD-Burst Mode
          1. 7.4.6.7.1 TDD Burst Mode Examples
    5. 7.5 Programming
      1. 7.5.1 Serial Register Write
      2. 7.5.2 Serial Register Readout
    6. 7.6 Register Maps
      1. 7.6.1 Register Descriptions
        1. 7.6.1.1  Register Address 0
        2. 7.6.1.2  Register Address 1
        3. 7.6.1.3  Register Address 2
        4. 7.6.1.4  Register Address 3
        5. 7.6.1.5  Register Address 4
        6. 7.6.1.6  Register Address 5
        7. 7.6.1.7  Register Address 6
        8. 7.6.1.8  Register Address 7
        9. 7.6.1.9  Register Address 8
        10. 7.6.1.10 Register Address 12
        11. 7.6.1.11 Register Address 13
        12. 7.6.1.12 Register Address 14
        13. 7.6.1.13 Register Address 15
        14. 7.6.1.14 Register Address 16
        15. 7.6.1.15 Register Address 19
        16. 7.6.1.16 Register Address 22
        17. 7.6.1.17 Register Address 23
        18. 7.6.1.18 Register Address 26
        19. 7.6.1.19 Register Address 29
        20. 7.6.1.20 Register Address 30
        21. 7.6.1.21 Register Address 31
        22. 7.6.1.22 Register Address 32
        23. 7.6.1.23 Register Address 33
        24. 7.6.1.24 Address: 0x24, 0x25, 0x26, 0x27
        25. 7.6.1.25 Address: 0x28, 0x29, 0x2A, 0x2B
        26. 7.6.1.26 Register Address 44
        27. 7.6.1.27 Register Address 45
        28. 7.6.1.28 Register Address 46
        29. 7.6.1.29 Register Address 47
        30. 7.6.1.30 Address: 0x32, 0x33, 0x34, 0x35
        31. 7.6.1.31 Address: 0x36, 0x37, 0x38, 0x39
        32. 7.6.1.32 Register Address 58
        33. 7.6.1.33 Register Address 59
        34. 7.6.1.34 Register Address 60
        35. 7.6.1.35 Register Address 61
        36. 7.6.1.36 Register Address 99
        37. 7.6.1.37 Register Address 100
        38. 7.6.1.38 Register Address 103
        39. 7.6.1.39 Register Address 104
        40. 7.6.1.40 Register Address 107
        41. 7.6.1.41 Register Address 108
        42. 7.6.1.42 Register Address 111
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 SNR and Clock Jitter
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 CML SerDes Transmitter Interface
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • 4-Ch, 14-Bit 500MSPS With Digital Signal Processing
  • Power Amplifier Linearization (Feedback) Modes
    • 14-Bits Every Other Sample at 250MSPS
    • Programmable Resolution vs Duty Cycle
      • Duty Cycle 3:2 (60% 11-Bit, 40% 9-Bit)
      • Duty Cycle 2:3 (40% 12-Bit, 60% 9-Bit)
      • Duty Cycle 1:3 (25% 14-Bit, 75% 9-Bit)
  • Traffic Receiver Modes
    • 14-Bit 250MSPS: Decimate by 2 Filter, High/Low Pass
    • 9-Bit SNR-Boost Filter (150-MHz Max Bandwidth)
    • 9-to-14-Bit TDD Burst (200-MHz Max Bandwidth)
  • Flexible Input Clock Buffer With Divide by 1/2/4
  • JESD204B Digital Interface up to 5.0Gbps
    • 1 or 2 Lanes per Channel, With Subclass 1
  • 64-Pin VQFN Package (9 × 9 mm)

2 Applications

  • Multi-Carrier, Multi-Mode, Multi-Band Cellular Receivers
    • TDD-LTE
    • FDD-LTE
    • CDMA, WCMDA, CMDA2k
    • GSM
  • RF and Microwave Backhaul
    • Point-to-Point Backhaul
    • Point-to-Multi-Point Backhaul
  • Wireless Repeaters
  • Distributed Antenna Systems (DAS)
  • Broadband Wireless

3 Description

The ADS58J89 is a high-linearity, quad-channel, 14-bit, 250/500-MSPS IF (intermediate frequency) receiver. The four channels contain 500MSPS 14-bit ADCs followed by signal processing for wireless infrastructure systems. The channels can be configured in various modes depending on bandwidth, resolution and sample time requirements. The signal processing block contains selectable modes for decimation filters, SNR Boost filters, resolution versus time and time-division duplex (TDD) burst mode. Designed for high antenna count systems, the 4 channels provides high bandwidth and linearity to multi-channel receivers in a small footprint. The device can be dual function as traffic receiver and power amplifier linearization feedback path in TDD systems.

Key Specifications:

  • Power Dissipation: 875 mW/ch
  • Input Bandwidth (3dB): 900 MHz
  • Aperture Jitter: 98 fs rms
  • Channel Isolation: 85 dB
  • Performance at ƒin = 170 MHz at 1.25 Vpp,
    –1 dBFS
    • SNR: 65.8 dBFS
    • SFDR: 85 dBc HD2,3; 95 dBFS non-HD2,3

Device Information(1)

PART NUMBER PACKAGE MAX OUTPUT RATE
ADS58J89 VQFN (64) 500 MSPS
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

fbd_FAD_SBAS659.gif

4 Revision History

DATE REVISION NOTES
November 2014 * Initial release.