ZHCSQ74A September   2022  – November 2022 DAC82001

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagram
    8. 6.8 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 Digital-to-Analog Converter (DAC) Architecture
        1. 7.3.1.1 DAC Transfer Function
        2. 7.3.1.2 DAC Register Structure
      2. 7.3.2 Power-On Reset (POR)
      3. 7.3.3 Hardware Reset
      4. 7.3.4 Software Reset
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Serial Peripheral Interface (SPI)
        1. 7.5.1.1 SYNC Interrupt
    6. 7.6 Register Maps
      1. 7.6.1 Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Arbitrary Waveform Generator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Bipolar Analog Output Configuration
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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8.2.1.2 Detailed Design Procedure

Figure 8-1 shows a simplified circuit diagram of an arbitrary waveform generator. The DAC82001 specifies a THD+N of –91 dB at 1 kHz. The OPA328 provides a great balance between fast settling, bandwidth, and voltage and current noise. The buffer must have a negative voltage supply rail or an output offset to make sure the DAC output is not clipped. Attach two decoupling capacitors as close as possible to the VREF pin. Use 100 nF for the first capacitor to provide very good noise performance for the system. Use 47 pF for the second capacitor to allow for a good dynamic response performance that improves any code-to-code glitch. The REF5025 is a low-noise, very low-drift, precise voltage reference that generates a 2.5-V reference for this application.