AD7839ASZ

Overview

The AD7839ASZ is an octal 13-bit digital-to-analog converter featuring parallel input and voltage outputs. It integrates eight independent DAC channels within a single monolithic chip, utilizing an R-2R architecture. The device operates with a +5 V logic supply (VCC) and dual ±15 V analog supplies (VDD/VSS). Key electrical specifications include a maximum relative accuracy of –2 LSB, a typical output settling time of 30 µs, and a full-scale output range of ±10 V when driven by ±5 V reference voltages. Each channel includes a buffered output amplifier with a gain of two.

Feature Summary

• Integrates eight 13-bit DACs in one package with parallel data interface
• Voltage outputs buffered with gain-of-two amplifiers for direct drive capability
• Individual offset adjustment available for each DAC pair via DUTGND pins
• Asynchronous clear function allows switching all outputs to a user-defined voltage level

Applications

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

Procurement Notes

Verify the specific suffix 'S' corresponds to the Plastic Quad Flatpack (MQFP) package option as defined in the ordering guide. Confirm that the component meets the industrial temperature range requirements of –40 °C to +85 °C for the A version. Ensure power supply sequencing adheres to the recommended order of VDD/VSS followed by VCC to prevent high current states during startup.

Selection Notes

Select this component when multiple isolated analog voltage outputs are required from a single controller interface. The parallel bus interface requires 13 data lines plus control signals, which may impact pin count availability on the host processor. Consider the 44-lead MQFP package dimensions and thermal impedance of 95 °C/W if operating near the maximum junction temperature limits under high load conditions.

Part Context

The AD7839 belongs to the Analog Devices family of precision data converters. It is designed to replace discrete multi-channel DAC solutions, reducing board space and interconnect complexity. The device utilizes LC2MOS technology to achieve high speed and low power consumption while maintaining monotonicity over the specified temperature range.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.