SLVSEO0B August   2021  – February 2023 ADC12DJ4000RF

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  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: DC Specifications
    6. 7.6  Electrical Characteristics: Power Consumption
    7. 7.7  Electrical Characteristics: AC Specifications (Dual-Channel Mode)
    8. 7.8  Electrical Characteristics: AC Specifications (Single-Channel Mode)
    9. 7.9  Timing Requirements
    10. 7.10 Switching Characteristics
    11. 7.11 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 Analog Inputs
        1. 8.3.1.1 Analog Input Protection
        2. 8.3.1.2 Full-Scale Voltage (VFS) Adjustment
        3. 8.3.1.3 Analog Input Offset Adjust
      2. 8.3.2 ADC Core
        1. 8.3.2.1 ADC Theory of Operation
        2. 8.3.2.2 ADC Core Calibration
        3. 8.3.2.3 Analog Reference Voltage
        4. 8.3.2.4 ADC Overrange Detection
        5. 8.3.2.5 Code Error Rate (CER)
      3. 8.3.3 Temperature Monitoring Diode
      4. 8.3.4 Timestamp
      5. 8.3.5 Clocking
        1. 8.3.5.1 Noiseless Aperture Delay Adjustment (tAD Adjust)
        2. 8.3.5.2 Aperture Delay Ramp Control (TAD_RAMP)
        3. 8.3.5.3 SYSREF Capture for Multi-Device Synchronization and Deterministic Latency
          1. 8.3.5.3.1 SYSREF Position Detector and Sampling Position Selection (SYSREF Windowing)
          2. 8.3.5.3.2 Automatic SYSREF Calibration
      6. 8.3.6 Programmable FIR Filter (PFIR)
        1. 8.3.6.1 Dual Channel Equalization
        2. 8.3.6.2 Single Channel Equalization
        3. 8.3.6.3 Time Varying Filter
      7. 8.3.7 Digital Down Converters (DDC)
        1. 8.3.7.1 Rounding and Saturation
        2. 8.3.7.2 Numerically-Controlled Oscillator and Complex Mixer
          1. 8.3.7.2.1 NCO Fast Frequency Hopping (FFH)
          2. 8.3.7.2.2 NCO Selection
          3. 8.3.7.2.3 Basic NCO Frequency Setting Mode
          4. 8.3.7.2.4 Rational NCO Frequency Setting Mode
          5. 8.3.7.2.5 NCO Phase Offset Setting
          6. 8.3.7.2.6 NCO Phase Synchronization
        3. 8.3.7.3 Decimation Filters
        4. 8.3.7.4 Output Data Format
        5. 8.3.7.5 Decimation Settings
          1. 8.3.7.5.1 Decimation Factor
          2. 8.3.7.5.2 DDC Gain Boost
      8. 8.3.8 JESD204C Interface
        1. 8.3.8.1  Transport Layer
        2. 8.3.8.2  Scrambler
        3. 8.3.8.3  Link Layer
        4. 8.3.8.4  8B/10B Link Layer
          1. 8.3.8.4.1 Data Encoding (8B/10B)
          2. 8.3.8.4.2 Multiframes and the Local Multiframe Clock (LMFC)
          3. 8.3.8.4.3 Code Group Synchronization (CGS)
          4. 8.3.8.4.4 Initial Lane Alignment Sequence (ILAS)
          5. 8.3.8.4.5 Frame and Multiframe Monitoring
        5. 8.3.8.5  64B/66B Link Layer
          1. 8.3.8.5.1 64B/66B Encoding
          2. 8.3.8.5.2 Multiblocks, Extended Multiblocks and the Local Extended Multiblock Clock (LEMC)
          3. 8.3.8.5.3 Block, Multiblock and Extended Multiblock Alignment using Sync Header
            1. 8.3.8.5.3.1 Cyclic Redundancy Check (CRC) Mode
            2. 8.3.8.5.3.2 Forward Error Correction (FEC) Mode
          4. 8.3.8.5.4 Initial Lane Alignment
          5. 8.3.8.5.5 Block, Multiblock and Extended Multiblock Alignment Monitoring
        6. 8.3.8.6  Physical Layer
        7. 8.3.8.7  SerDes Pre-Emphasis
        8. 8.3.8.8  JESD204C Enable
        9. 8.3.8.9  Multi-Device Synchronization and Deterministic Latency
        10. 8.3.8.10 Operation in Subclass 0 Systems
      9. 8.3.9 Alarm Monitoring
        1. 8.3.9.1 NCO Upset Detection
        2. 8.3.9.2 Clock Upset Detection
        3. 8.3.9.3 FIFO Upset Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Dual-Channel Mode
      2. 8.4.2 Single-Channel Mode (DES Mode)
      3. 8.4.3 Dual-Input Single-Channel Mode (DUAL DES Mode)
      4. 8.4.4 JESD204C Modes
        1. 8.4.4.1 JESD204C Operating Modes Table
        2. 8.4.4.2 JESD204C Modes continued
        3. 8.4.4.3 JESD204C Transport Layer Data Formats
        4. 8.4.4.4 64B/66B Sync Header Stream Configuration
        5. 8.4.4.5 Dual DDC and Redundant Data Mode
      5. 8.4.5 Power-Down Modes
      6. 8.4.6 Test Modes
        1. 8.4.6.1 Serializer Test-Mode Details
        2. 8.4.6.2 PRBS Test Modes
        3. 8.4.6.3 Clock Pattern Mode
        4. 8.4.6.4 Ramp Test Mode
        5. 8.4.6.5 Short and Long Transport Test Mode
          1. 8.4.6.5.1 Short Transport Test Pattern
          2. 8.4.6.5.2 Long Transport Test Pattern
        6. 8.4.6.6 D21.5 Test Mode
        7. 8.4.6.7 K28.5 Test Mode
        8. 8.4.6.8 Repeated ILA Test Mode
        9. 8.4.6.9 Modified RPAT Test Mode
      7. 8.4.7 Calibration Modes and Trimming
        1. 8.4.7.1 Foreground Calibration Mode
        2. 8.4.7.2 Background Calibration Mode
        3. 8.4.7.3 Low-Power Background Calibration (LPBG) Mode
      8. 8.4.8 Offset Calibration
      9. 8.4.9 Trimming
    5. 8.5 Programming
      1. 8.5.1 Using the Serial Interface
        1. 8.5.1.1 SCS
        2. 8.5.1.2 SCLK
        3. 8.5.1.3 SDI
        4. 8.5.1.4 SDO
        5. 8.5.1.5 Streaming Mode
    6. 8.6 SPI Register Map
  9. 9 Application Information Disclaimer
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Wideband RF Sampling Receiver
        1. 9.2.1.1 Design Requirements
          1. 9.2.1.1.1 Input Signal Path
          2. 9.2.1.1.2 Clocking
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Calculating Values of AC-Coupling Capacitors
        3. 9.2.1.3 Application Curves
    3. 9.3 Initialization Set Up
  10. 10Power Supply Recommendations
    1. 10.1 Power Sequencing
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 142
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.1 Analog Inputs

The analog inputs of the device have internal buffers to enable high input bandwidth and to isolate sampling capacitor glitch noise from the input circuit. Analog inputs must be driven differentially because operation with a single-ended signal results in degraded performance. Both AC-coupling and DC-coupling of the analog inputs is supported. The analog inputs are designed for an input common-mode voltage (VCMI) of 0 V, which is terminated internally through single-ended, 50-Ω resistors to ground (GND) on each input pin. DC-coupled input signals must have a common-mode voltage that meets the device input common-mode requirements specified as VCMI in the Recommended Operating Conditions table. The 0-V input common-mode voltage simplifies the interface to split-supply, fully-differential amplifiers and to a variety of transformers and baluns. The device includes internal analog input protection to protect the ADC inputs during overranged input conditions; see the Analog Input Protection section. Figure 8-1 provides a simplified analog input model.

GUID-21D1990A-B06D-4C87-A305-E2817E208D45-low.gifFigure 8-1 ADC12DJ4000RF Analog Input Internal Termination and Protection Diagram

There is minimal degradation in analog input bandwidth when using single-channel mode versus dual-channel mode. Either analog input (INA+ and INA– or INB+ and INB–) can be used in single-channel mode. The desired input can be chosen using SINGLE_INPUT in the input mux control register. A calibration needs to be performed after switching the input mux for the changes to take effect. Further, two inputs can be used in single-channel mode to drive the interleaved ADCs separately using the SINGLE_INPUT register setting. This mode is called dual-input single-channel mode. Dual-input single-channel mode is equivalent to dual channel mode, except ADC B samples out-of-phase with ADC A (single-channel mode sample timing). This mode is available when a single-channel mode JMODE setting is chosen.