ZHCSJA4B January   2019  – May 2022 DLP4500

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Chipset Component Usage Specification
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Storage Conditions
    3. 7.3  ESD Ratings
    4. 7.4  Recommended Operating Conditions
    5. 7.5  Thermal Information
    6. 7.6  Electrical Characteristics
    7. 7.7  Timing Requirements
    8. 7.8  System Mounting Interface Loads
    9. 7.9  Micromirror Array Physical Characteristics
    10. 7.10 Micromirror Array Optical 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
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operating Modes
    5. 8.5 Micromirror Array Temperature Calculation
      1. 8.5.1 Package Thermal Resistance
      2. 8.5.2 Case Temperature
        1. 8.5.2.1 Temperature Calculation
    6. 8.6 Micromirror Landed-on/Landed-Off Duty Cycle
      1. 8.6.1 Definition of Micromirror Landed-On/Landed-Off Duty Cycle
      2. 8.6.2 Landed Duty Cycle and Useful Life of the DMD
      3. 8.6.3 Landed Duty Cycle and Operational DMD Temperature
      4. 8.6.4 Estimating the Long-Term Average Landed Duty Cycle of a Product or Application
  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
        1. 9.2.2.1 DLPC350 System Interfaces
          1. 9.2.2.1.1 Control Interface
          2. 9.2.2.1.2 Input Data Interface
        2. 9.2.2.2 DLPC350 System Output Interfaces
          1. 9.2.2.2.1 Illumination Interface
          2. 9.2.2.2.2 Trigger Interface (Sync Outputs)
        3. 9.2.2.3 DLPC350 System Support Interfaces
          1. 9.2.2.3.1 Reference Clock
          2. 9.2.2.3.2 PLL
          3. 9.2.2.3.3 Program Memory Flash Interface
        4. 9.2.2.4 DMD Interfaces
          1. 9.2.2.4.1 DLPC350 to DMD Digital Data
          2. 9.2.2.4.2 DLPC350 to DMD Control Interface
          3. 9.2.2.4.3 DLPC350 to DMD Micromirror Reset Control Interface
  10. 10Power Supply Recommendations
    1. 10.1 Power Supply Sequencing Requirements
    2. 10.2 DMD Power Supply Power-Up Procedure
    3. 10.3 DMD Power Supply Power-Down Procedure
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 DMD Interface Design Considerations
      2. 11.1.2 DMD Termination Requirements
      3. 11.1.3 Decoupling Capacitors
      4. 11.1.4 Power Plane Recommendations
      5. 11.1.5 Signal Layer Recommendations
      6. 11.1.6 General Handling Guidelines for CMOS-Type Pins
      7. 11.1.7 PCB Manufacturing
        1. 11.1.7.1 General Guidelines
        2. 11.1.7.2 Trace Widths and Minimum Spacings
        3. 11.1.7.3 Routing Constraints
        4. 11.1.7.4 Fiducials
        5. 11.1.7.5 Flex Considerations
        6. 11.1.7.6 DLPC350 Thermal Considerations
    2. 11.2 Layout Example
      1. 11.2.1 Printed Circuit Board Layer Stackup Geometry
      2. 11.2.2 Recommended DLPC350 MOSC Crystal Oscillator Configuration
      3. 11.2.3 Recommended DLPC350 PLL Layout Configuration
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
      2. 12.1.2 Device Nomenclature
    2. 12.2 Device Markings
    3. 12.3 Documentation Support
      1. 12.3.1 Related Documentation
    4. 12.4 接收文档更新通知
    5. 12.5 支持资源
    6.     Trademarks
    7. 12.6 Electrostatic Discharge Caution
    8. 12.7 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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11.1.1 DMD Interface Design Considerations

The DMD interface is modeled after the low-power DDR-memory (LPDDR) interface. To minimize power dissipation, the LPDDR interface is defined to be unterminated. As a result, PCB signal-integrity management is imperative. Impedance control and crosstalk mitigation is critical to robust operation. LPDDR board design recommendations include trace spacing that is three times the trace width, impedance control within 10%, and signal routing directly over a neighboring reference plane (ground or 1.9-V plane).

DMD interface performance is also a function of trace length; therefore the length of the trace limits performance. The DLPC350 controller only works over a narrow range of DMD signal routing lengths at 120 MHz. Ensuring positive timing margins requires attention to many factors.

As an example, the DMD interface system timing margin can be calculated as follows.

Equation 7. Setup Margin = (DLPC350 Output Setup) – (DMD Input Setup) – (PCB Routing Mismatch) – (PCB SI Degradation)
Equation 8. Hold-Time Margin = (DLPC350 Output Hold) – (DMD Input Hold) – (PCB Routing Mismatch) – (PCB SI Degradation)

PCB signal integrity degradation can be minimized by reducing the affects of simultaneously switching output (SSO) noise, crosstalk, and inter-symbol interface (ISI). Additionally, PCB routing mismatch can be budgeted via controlled PCB routing.

In an attempt to minimize the need for signal integrity analysis that would otherwise be required, the following PCB design guidelines are provided. They describe an interconnect system that satisfies both waveform quality and timing requirements (accounting for both PCB routing mismatch and PCB SI degradation). Variation from these recommendations may also work, but should be confirmed with PCB signal integrity analysis or lab measurements.