SNAS449F February   2008  – May 2017 DAC081C081 , DAC081C085

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Block Diagram
  4. 4 Revision History
  5. 5 Description (continued)
  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 AC and Timing Characteristics
    7. 7.7 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 DAC Section
      2. 8.3.2 Output Amplifier
      3. 8.3.3 Reference Voltage
      4. 8.3.4 Power-On Reset
      5. 8.3.5 Simultaneous Reset
      6. 8.3.6 Additional Timing Information: toutz
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Down Modes
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
      2. 8.5.2 Basic I2C Protocol
      3. 8.5.3 Standard-Fast Mode
      4. 8.5.4 High-Speed (Hs) Mode
      5. 8.5.5 I2C Slave (Hardware) Address
      6. 8.5.6 Writing to the DAC Register
      7. 8.5.7 Reading from the DAC Register
    6. 8.6 Registers
      1. 8.6.1 DAC Register
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Bipolar Operation
      2. 9.1.2 DSP/Microprocessor Interfacing
        1. 9.1.2.1 Interfacing to the 2-Wire Bus
        2. 9.1.2.2 Interfacing to a Hs-mode Bus
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
    1. 10.1 Using References as Power Supplies
      1. 10.1.1 LM4132
      2. 10.1.2 LM4050
      3. 10.1.3 LP3985
      4. 10.1.4 LP2980
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
      2. 12.1.2 Device Nomenclature
        1. 12.1.2.1 Specification Definitions
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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1 Features

  • Ensured Monotonicity to 8-bits
  • Low Power Operation: 156 µA Maximum at 3.3 V
  • Extended Power Supply Range (2.7 V to 5.5 V)
  • I2C-Compatible 2-Wire Interface Which Supports Standard (100-kHz), Fast (400-kHz), and High-Speed (3.4-MHz) Modes
  • Rail-to-Rail Voltage Output
  • Very Small Package
  • Resolution 8 Bits
  • INL ±0.6 LSB (Maximum)
  • DNL ±0.1 LSB (Maximum)
  • Settling Time 4.5 μs (Maximum)
  • Zero Code Error +10 mV (Maximum)
  • Full-Scale Error −0.7 %FS (Maximum)
  • Supply Power
    • Normal
      • 380 μW (3 V)
      • 730 μW (5 V) Typical
    • Power Down
      • 0.5 μW (3 V)
      • 0.9 μW (5 V) Typical

2 Applications

  • Industrial Process Control
  • Portable Instruments
  • Digital Gain and Offset Adjustments
  • Programmable Voltage and Current Sources
  • Test Equipment

3 Description

The DAC081C08x device is an 8-bit, single-channel, voltage-output digital-to-analog converter (DAC) that operates from a 2.7-V to 5.5-V supply. The output amplifier allows rail-to-rail output swing and has an 4.5-µsec settling time. The DAC081C081 uses the supply voltage as the reference to provide the widest dynamic output range and typically consumes 132 µA while operating at 5 V. It is available in 6-lead SOT and WSON packages and provides three address options (pin selectable).

As an alternative, the DAC081C085 provides nine I2C addressing options and uses an external reference. It has the same performance and settling time as the DAC081C081. It is available in an 8-lead VSSOP.

The DAC081C081 and DAC081C085 use a 2-wire, I2C-compatible serial interface that operates in all three speed modes, including high-speed mode (3.4 MHz). An external address selection pin allows up to three DAC081C081 or nine DAC081C085 devices per 2-wire bus. Pin-compatible alternatives to the DAC081C081 are available that provide additional address options.

Table 1. Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DAC081C081 WSON (6) 2.20 mm × 2.50 mm
SOT (6) 1.60 mm × 2.90 mm
DAC081C085 VSSOP (8) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

3.1 Block Diagram

DAC081C081 DAC081C085 30052303.gif