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

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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.
MX7839: Functional Block Diagram MX7839: Functional Block Diagram Enlarge+

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


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

Technical Documents

App Note 4491 Damage from a Lightning Bolt or a Spark—It Depends on How Tall You Are!
App Note 4490 How Signal Chains and PLCs Impact Our Lives

Quality and Environmental Data

Request Reliability Report for: MX7839 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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