ZHCSOM0 October   2020 DAC43401-Q1 , DAC53401-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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  Timing Requirements: I2C Standard Mode
    7. 7.7  Timing Requirements: I2C Fast Mode
    8. 7.8  Timing Requirements: I2C Fast Mode Plus
    9. 7.9  Typical Characteristics: VDD = 1.8 V (Reference = VDD) or VDD = 2 V (Internal Reference)
    10. 7.10 Typical Characteristics: VDD = 5.5 V (Reference = VDD) or VDD = 5 V (Internal Reference)
    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 Digital-to-Analog Converter (DAC) Architecture
        1. 8.3.1.1 Reference Selection and DAC Transfer Function
          1. 8.3.1.1.1 Power Supply as Reference
          2. 8.3.1.1.2 Internal Reference
      2. 8.3.2 DAC Update
        1. 8.3.2.1 DAC Update Busy
      3. 8.3.3 Nonvolatile Memory (EEPROM or NVM)
        1. 8.3.3.1 NVM Cyclic Redundancy Check
        2. 8.3.3.2 NVM_CRC_ALARM_USER Bit
        3. 8.3.3.3 NVM_CRC_ALARM_INTERNAL Bit
      4. 8.3.4 Programmable Slew Rate
      5. 8.3.5 Power-on-Reset (POR)
      6. 8.3.6 Software Reset
      7. 8.3.7 Device Lock Feature
      8. 8.3.8 PMBus Compatibility
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Down Mode
      2. 8.4.2 Continuous Waveform Generation (CWG) Mode
      3. 8.4.3 PMBus Compatibility Mode
    5. 8.5 Programming
      1. 8.5.1 F/S Mode Protocol
      2. 8.5.2 I2C Update Sequence
        1. 8.5.2.1 Address Byte
        2. 8.5.2.2 Command Byte
      3. 8.5.3 I2C Read Sequence
    6. 8.6 Register Map
      1. 8.6.1 STATUS Register (address = D0h) [reset = 000Ch or 0014h]
      2. 8.6.2 GENERAL_CONFIG Register (address = D1h) [reset = 01F0h]
      3. 8.6.3 TRIGGER Register (address = D3h) [reset = 0008h]
      4. 8.6.4 DAC_DATA Register (address = 21h) [reset = 0000h]
      5. 8.6.5 DAC_MARGIN_HIGH Register (address = 25h) [reset = 0000h]
      6. 8.6.6 DAC_MARGIN_LOW Register (address = 26h) [reset = 0000h]
      7. 8.6.7 PMBUS_OPERATION Register (address = 01h) [reset = 0000h]
      8. 8.6.8 PMBUS_STATUS_BYTE Register (address = 78h) [reset = 0000h]
      9. 8.6.9 PMBUS_VERSION Register (address = 98h) [reset = 2200h]
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Programmable LED Biasing
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Power-Supply Margining
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  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 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 静电放电警告
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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订购信息

8.5.2.1 Address Byte

The address byte, as shown in Table 8-8, is the first byte received from the master device following the start condition. The first four bits (MSBs) of the address are factory preset to 1001. The next three bits of the address are controlled by the A0 pin. The A0 pin input can be connected to VDD, AGND, SCL, or SDA. The A0 pin is sampled during the first byte of each data frame to determine the address. The device latches the value of the address pin, and consequently responds to that particular address according to Table 8-9.

Table 8-8 Address Byte
COMMENT MSB LSB
— AD6 AD5 AD4 AD3 AD2 AD1 AD0 R/ W
General address 1 0 0 1 See Table 8-9
(slave address column)		 0 or 1
Broadcast address 1 0 0 0 1 1 1 0

The DACx3401-Q1 supports broadcast addressing, which is used for synchronously updating or powering down multiple DACx3401-Q1 devices. When the broadcast address is used, the DACx3401-Q1 responds regardless of the address pin state. Broadcast is supported only in write mode.

Table 8-9 Address Format
SLAVE ADDRESS A0 PIN
000 AGND
001 VDD
010 SDA
011 SCL
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