SBAS794E november   2018  – august 2023 DAC60501 , DAC70501 , DAC80501

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 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: SPI Mode
    7. 7.7  Timing Requirements: I2C Standard Mode
    8. 7.8  Timing Requirements: I2C Fast Mode
    9. 7.9  Timing Requirements: I2C Fast-Mode Plus
    10. 7.10 Timing Diagrams
    11. 7.11 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 DAC Architecture
        1. 8.3.1.1 DAC Transfer Function
        2. 8.3.1.2 DAC Register Structure
        3. 8.3.1.3 Output Amplifier
      2. 8.3.2 Internal Reference
        1. 8.3.2.1 Solder Heat Reflow
      3. 8.3.3 Power-On-Reset (POR)
      4. 8.3.4 Software Reset
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Down Mode
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1 SPI Mode
          1. 8.5.1.1.1 SYNC Interrupt
        2. 8.5.1.2 I2C Mode
          1. 8.5.1.2.1 F/S Mode Protocol
          2. 8.5.1.2.2 I2C Update Sequence
            1. 8.5.1.2.2.1 Address Byte
            2. 8.5.1.2.2.2 Command Byte
            3. 8.5.1.2.2.3 Data Byte (MSDB and LSDB)
          3. 8.5.1.2.3 I2C Read Sequence
    6. 8.6 Register Map
  10. 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 Charge Injection
        2. 9.2.2.2 Voltage Droop
        3. 9.2.2.3 Output Offset Error
        4. 9.2.2.4 Switch Selection
        5. 9.2.2.5 Amplifier Selection
        6. 9.2.2.6 Hold Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
8.5.1.2.1 F/S Mode Protocol
  1. The controller initiates data transfer by generating a start condition. The start condition is when a high to-low transition occurs on the SDA line while SCL is high, as shown in Figure 8-5. All I2C-compatible devices recognize a start condition.
    GUID-23DAF8EF-6C00-4865-8468-6CBAC02545E3-low.gif Figure 8-5 Start and Stop Conditions
    GUID-68F4112B-DD33-4D0F-86E1-D86FE2FBB82A-low.gif Figure 8-6 Bit Transfer on the I2C Bus
  2. The controller then generates the SCL pulses, and transmits the 7-bit address and the read/write direction bit (R/W) on the SDA line. During all transmissions, the controller makes sure that data are valid. Figure 8-6 shows that a valid data condition requires the SDA line to be stable during the entire high period of the clock pulse. All devices recognize the address sent by the controller and compare the address to the internal fixed addresses. Only the target device with a matching address generates an acknowledge by pulling the SDA line low during the entire high period of the ninth SCL cycle; see also Figure 8-4 by pulling the SDA line low during the entire high period of the ninth SCL cycle. Upon detecting this acknowledge, the controller knows the communication link with a target has been established.
  3. The controller generates further SCL cycles to transmit (R/W bit 0) or receive (R/W bit 1) data to the target. In either case, the receiver must acknowledge the data sent by the transmitter. Therefore, the acknowledge signal can be generated by the controller or by the target, depending on which one is the receiver. The 9-bit valid data sequences consists of 8-data bits and 1 acknowledge-bit, and can continue as long as necessary.
  4. To signal the end of the data transfer, the controller generates a stop condition by pulling the SDA line from low to high while the SCL line is high (see Figure 8-5). This action releases the bus and stops the communication link with the addressed target. All I2C-compatible devices recognize the stop condition. Upon receipt of a stop condition, the bus is released, and all target devices then wait for a start condition followed by a matching address.