SLAS959D August   2013  – February 2018 DAC3151 , DAC3161 , DAC3171

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     DAC31x1 System Block Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions: DAC3151
    2.     Pin Functions: DAC3161
    3.     Pin Functions: DAC3171 7-Bit Interface Mode
    4.     Pin Functions: DAC3171 14-Bit Interface Mode
  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: DC Specifications
    6. 6.6 Electrical Characteristics: AC Specifications
    7. 6.7 Electrical Characteristics: Digital Specifications
    8. 6.8 Timing Requirements
    9. 6.9 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Data Input Formats
      2. 7.3.2 Serial Interface
        1. Table 1. Instruction Byte of the Serial interface
    4. 7.4 Device Functional Modes
      1. 7.4.1 Synchronization Modes
      2. 7.4.2 Alarm Monitoring
    5. 7.5 Programming
      1. 7.5.1 Power-Up Sequence
    6. 7.6 Register Map
      1. 7.6.1  Register Name: config0 – Address: 0x00, Default: 0x4FC
        1. Table 6. Register Name: config0 – Address: 0x00, Default: 0x4FC
      2. 7.6.2  Register Name: config1 – Address: 0x01, Default: 0x600E
        1. Table 7. Register Name: config1 – Address: 0x01, Default: 0x600E
      3. 7.6.3  Register Name: config2 – Address: 0x02, Default: 0x3FFF
        1. Table 8. Register Name: config2 – Address: 0x02, Default: 0x3FFF
      4. 7.6.4  Register Name: config3 – Address: 0x03, Default: 0x0000
        1. Table 9. Register Name: config3 – Address: 0x03, Default: 0x0000
      5. 7.6.5  Register Name: config4 – Address: 0x04, Default: 0x0000
        1. Table 10. Register Name: config4 – Address: 0x04, Default: 0x0000
      6. 7.6.6  Register Name: config5 – Address: 0x05, Default: 0x0000
        1. Table 11. Register Name: config5 – Address: 0x05, Default: 0x0000
      7. 7.6.7  Register Name: config6 – Address: 0x06, Default: 0x0010(DAC3171); 0x0094(DAC3161); 0x0098(DAC3151)
        1. Table 12. Register Name: config6 – Address: 0x06, Default: 0x0010(DAC3171); 0x0094(DAC3161); 0x0098(DAC3151)
      8. 7.6.8  Register Name: config7 – Address: 0x07, Default: 0xFFFF
        1. Table 13. Register Name: config7 – Address: 0x07, Default: 0xFFFF
      9. 7.6.9  Register Name: config8 – Address: 0x08, Default: 0x6000
        1. Table 14. Register Name: config8 – Address: 0x08, Default: 0x6000
      10. 7.6.10 Register Name: config9 – Address: 0x09, Default: 0x8000
        1. Table 15. Register Name: config9 – Address: 0x09, Default: 0x8000
      11. 7.6.11 Register name: config10 – Address: 0x0A, Default: 0xF080
        1. Table 16. Register Name: config10 – Address: 0x0A, Default: 0xF080
      12. 7.6.12 Register Name: config11 – Address: 0x0B, Default: 0x1111
        1. Table 17. Register Name: config11 – Address: 0x0B, Default: 0x1111
      13. 7.6.13 Register Name: config12 – Address: 0x0C, Default: 0x3A7A
        1. Table 18. Register Name: config12 – Address: 0x0C, Default: 0x3A7A
      14. 7.6.14 Register Name: config13 – Address: 0x0D, Default: 0x36B6
        1. Table 19. Register Name: config13 – Address: 0x0D, Default: 0x36B6
      15. 7.6.15 Register Name: config14 – Address: 0x0E, Default: 0x2AEA
        1. Table 20. Register name: config14 – Address: 0x0E, Default: 0x2AEA
      16. 7.6.16 Register name: config15 – Address: 0x0F, Default: 0x0545
        1. Table 21. Register Name: config15 – Address: 0x0F, Default: 0x0545
      17. 7.6.17 Register Name: config16 – Address: 0x10, Default: 0x0585
        1. Table 22. Register Name: config16 – Address: 0x10, Default: 0x0585
      18. 7.6.18 Register Name: config17 – Address: 0x11, Default: 0x0949
        1. Table 23. Register Name: config17 – Address: 0x11, Default: 0x0949
      19. 7.6.19 Register Name: config18 – Address: 0x12, Default: 0x1515
        1. Table 24. Register Name: config18 – Address: 0x12, Default: 0x1515
      20. 7.6.20 Register Name: config19 – Address: 0x13, Default: 0x3ABA
        1. Table 25. Register Name: config19 – Address: 0x13, Default: 0x3ABA
      21. 7.6.21 Register Name: config20– Address: 0x14, Default: 0x0000
        1. Table 26. Register Name: config20– Address: 0x14, Default: 0x0000
      22. 7.6.22 Register Name: config21– Address: 0x15, Default: 0xFFFF
        1. Table 27. Register Name: config21– Address: 0x15, Default: 0xFFFF
      23. 7.6.23 Register Name: config22– Address: 0x16, Default: 0x0000
        1. Table 28. Register Name: config22– Address: 0x16, Default: 0x0000
      24. 7.6.24 Register Name: config23– Address: 0x17, Default: 0x0000
        1. Table 29. Register Name: config23– Address: 0x17, Default: 0x0000
      25. 7.6.25 Register Name: config24– Address: 0x18, Default: 0x0000
        1. Table 30. Register Name: config24– Address: 0x18, Default: 0x0000
      26. 7.6.26 Register Name: config25– Address: 0x19, Default: 0x0000
        1. Table 31. Register Name: config25– Address: 0x19, Default: 0x0000
      27. 7.6.27 Register Name: config127– Address: 0x7F, Default: 0x0045
        1. Table 32. Register Name: config127– Address: 0x7F, Default: 0x0045
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Definition of Specifications
    2. 11.2 Related Links
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2 Detailed Design Procedure

The data pattern file that represents the desired 5-MHz, single-carrier WCDMA signal is created with a pattern generation is clocked into the DAC31x1 by an FPGA as shown in the Figure 72. We choose to generate the data pattern file with the 5-MHz WCDMA signal centered at an intermediate frequency of 100 MHz and use a local oscillator of 800 MHz to upconvert the modulated signal to 900 MHz. The real mixer will create an image of the desired signal centered about 700 MHz, and there will also be local oscillator (LO) feedthrough observed at 800 MHz. A band-pass filter that follows the mixer is needed to remove the lower image of the signal and the local oscillator feedthrough, as shown in Figure 73.

DAC3151 DAC3161 DAC3171 dac31x1_signal-spectrum-in-a-real-if-transmitter.gifFigure 73. Signal Spectrum in a Real IF Transmitter

The choice of the intermediate frequency has an impact on the design of the 900-MHz band-pass filter. The band-pass filter is to pass the WCDMA signal image that is centered at 900 MHz, but provide significant attenuation of the local oscillator feedthrough and the signal image. The distance between the signal and the image is equal to twice the intermediate frequency. If the intermediate frequency is too low, the image gets too close to the signal, then a higher order band pass filter with steep roll-off is required. If the intermediate frequency is too high, the image would be further away from the signal, but the signal would be too far out towards the end of the Nyquist zone, and the SinX/X distortion would become an issue. Centering the DAC output signal at an intermediate frequency of 100 MHz is a good and balanced choice in this example, making the design of the band-pass filter reasonably easy.

The DAC31x1 does not have an interpolation option, so the data rate for the sample data will be the same rate as the sample rate to the DAC31x1. In this case, we choose a sample rate of 500 MSPS, the maximum sample rate for this device.