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Octal, 13-Bit Voltage-Output DAC with Parallel Interface

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Full 13-Bit Performance without Adjustments
  • Eight DACs in a Single Package
  • Buffered Voltage Outputs
  • Unipolar or Bipolar Voltage Swing to ±10V
  • 31µs Output Settling Time
  • Small 44-Pin MQFP Package
  • Double-Buffered Digital Inputs
  • Asynchronous Load Updates All DACs Simultaneously
  • Asynchronous active-low CLR Forces All DACs to DUTGND_ _ Potential

Applications/Uses

  • Arbitrary Function Generators
  • Automated Test Equipment (ATE)
  • Avionics Equipment
  • Digital Offset and Gain Adjustments
  • Industrial Process Controls
  • Minimum Component Count Analog Systems
  • SONET Applications

Description

The MX7839 contains eight 13-bit, voltage-output digital-to-analog converters (DACs). On-chip precision output amplifiers provide the voltage outputs. The device operates from ±15V supplies. Its bipolar output voltage swing is ±10V and is achieved with no external components. The MX7839 has three pairs of differential reference inputs; two of these pairs are connected to two DACs each, and a third pair is connected to four DACs. The references are independently controlled, providing different full-scale output voltages to the respective DACs.

The MX7839 features double-buffered interface logic with a 13-bit parallel data bus. Each DAC has an input latch and a DAC latch. Data in the DAC latch sets the output voltage. The eight input latches are addressed with three address lines. Data is loaded to the input latch with a single write instruction. An asynchronous load input (active-low LDAC) transfers data from the input latch to the DAC latch. The active-low LDAC input controls all DACs; therefore, all DACs can be updated simultaneously by asserting active-low LDAC. An asynchronous active-low CLR input sets the output of all eight DACs to the respective DUTGND input of the op amp. Note that active-low CLR is a CMOS input, which is powered by VDD. All other logic inputs are TTL/CMOS compatible. The MX7839 is pin-for-pin compatible with AD7839.

Simplified Block Diagram

MX7839: Functional Block Diagram MX7839: Functional Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .