SBAS442D august   2008  – august 2023 DAC5311 , DAC6311 , DAC7311

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  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
    7. 7.7  Timing Diagrams
    8. 7.8  Typical Characteristics: AVDD = 5 V
    9. 7.9  Typical Characteristics: AVDD = 3.6 V
    10. 7.10 Typical Characteristics: AVDD = 2.7 V
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 DAC Section
      2. 8.3.2 Resistor String
      3. 8.3.3 Output Amplifier
      4. 8.3.4 Power-On Reset
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Down Modes
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1 Input Shift Register
        2. 8.5.1.2 SYNC Interrupt
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Microprocessor Interfacing
        1. 9.1.1.1 DACx311 to 8051 Interface
        2. 9.1.1.2 DACx311 to Microwire Interface
        3. 9.1.1.3 DACx311 to 68HC11 Interface
    2. 9.2 Typical Applications
      1. 9.2.1 Loop Powered Transmitter
        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 Using the REF5050 as a Power Supply for the DACx311
      3. 9.2.3 Bipolar Operation Using the DACx311
    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 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.5.1.1 Input Shift Register

The input shift register is 16 bits wide, as shown in Table 8-2. The first two bits (PD0 and PD1) are reserved control bits that set the desired mode of operation (normal mode or any one of three power-down modes) as indicated in Table 8-1.

The remaining data bits are either 12 (DAC7311), 10 (DAC6311), or 8 (DAC5311) data bits, followed by don't care bits, as shown in Table 8-2, Table 8-3, and Table 8-4, respectively.

Table 8-2 DAC5311 8-Bit Data Input Register
DB15 DB14 DB6 DB5 DB0
PD1 PD0 D7 D6 D5 D4 D3 D2 D1 D0 X X X X X X
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 8-3 DAC6311 10-Bit Data Input Register
DB15 DB14 DB4 DB3 DB0
PD1 PD0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X X X X
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 8-4 DAC7311 12-Bit Data Input Register
DB15 DB14 DB2 DB1 DB0
PD1 PD0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X X
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

The write sequence begins by bringing the SYNC line low. Data from the DIN line are clocked into the 16-bit shift register on each falling edge of SCLK. The serial clock frequency can be as high as 50 MHz, making

the DACx311 compatible with high-speed DSPs. On the 16th falling edge of the serial clock, the last data bit is clocked in and the programmed function is executed.

At this point, the SYNC line can be kept low or brought high. In either case, SYNC must be brought high for a minimum of 20 ns before the next write sequence so that a falling edge of SYNC can initiate the next write sequence.