AD7839ASZ-REEL

Overview

The AD7839ASZ-REEL is an octal 13-bit parallel input voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates eight independent DAC channels within a single monolithic chip, housed in a 44-lead MQFP package. The device accepts straight binary data via parallel inputs and provides buffered voltage outputs with a full-scale range of ±10 V when using ±5 V reference voltages. Key specifications include a maximum relative accuracy of –2 LSB, a settling time of 40 µs max, and a reference input range spanning up to 65 V. It operates on dual analog supplies (+15 V/–15 V) and a +5 V logic supply.

Feature Summary

• Octal configuration with eight 13-bit DACs in one package
• Parallel interface with individual channel address decoding (A0-A2)
• Offset adjust capability for each DAC pair via DUTGND pins
• Asynchronous clear function to user-defined voltage level

Applications

• Automatic Test Equipment (ATE)
• Process Control Systems
• General Purpose Instrumentation

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging suitable for automated assembly. Confirm the ASZ designation corresponds to the industrial temperature range (-40°C to +85°C) and lead-free compliance. Ensure the specific reel quantity matches production requirements, as this suffix denotes bulk packaging rather than tube or tray distribution.

Selection Notes

Select this component when multiple low-channel-count DACs are required in a compact footprint. The parallel interface necessitates sufficient microcontroller or DSP I/O lines for 13-bit data plus control signals. Verify that the system can provide the required ±15 V analog supplies and +5 V logic supply. Consider the 44-lead MQFP package size and thermal dissipation characteristics for the PCB layout.

Part Context

The AD7839 is part of Analog Devices' high-density DAC family designed for multi-channel applications. The 'A' suffix specifies the industrial temperature grade, while 'S' denotes the MQFP plastic quad flatpack package. The 'Z' indicates RoHS compliance. This specific part number combines these attributes with reel packaging for surface-mount technology integration.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided documentation. Evaluate other octal DACs from Analog Devices or competitors with similar 13-bit resolution, parallel interfaces, and ±15 V supply requirements. Verify that substitute devices match the 44-lead MQFP footprint and electrical specifications such as settling time and accuracy.