AD7836ASZ

Overview

The AD7836ASZ is a monolithic quad 14-bit digital-to-analog converter (DAC) manufactured by Analog Devices. It integrates four independent voltage-output DACs within a single 44-lead MQFP package. The device utilizes an R-2R segmented architecture and accepts 14-bit parallel data via DB0–DB13 inputs, selected through address pins A0–A2. Each channel features a buffered output with a gain of two, allowing for a full-scale range of ±10 V when supplied with ±5 V reference voltages. Key performance specifications include a typical settling time of 16 µs, a maximum relative accuracy of ±2 LSB, and a differential nonlinearity of ±0.9 LSB. The component operates on separate analog supplies (+15 V/–15 V) and a +5 V logic supply.

Feature Summary

• Quad 14-Bit Architecture: Integrates four independent 14-bit DAC channels in a single 44-pin MQFP package.
• Voltage Output with Gain Two: Buffered outputs provide a full-scale range of ±10 V from ±5 V references.
• Independent Offset Adjustment: Each channel includes dedicated DUTGNDx pins for external offset nulling.
• Parallel Interface: Accepts straight 14-bit parallel data loaded into individual latches under WR/CS control.
• Global Update Capability: SEL input allows simultaneous updating of all DAC outputs using Data Register E.

Applications

• Automated Test Equipment (ATE) pin electronics and window comparator biasing
• Process control systems requiring multi-channel signal generation
• General purpose instrumentation and data acquisition systems

Procurement Notes

Verify the specific suffix 'ASZ' corresponds to the industrial temperature range (-40°C to +85°C) and lead-free MQFP-44 packaging as defined in the ordering guide. Confirm that the source documentation explicitly lists this part number variant; generic family listings may not guarantee the presence of specific manufacturing lot codes or exact revision levels associated with the ASZ designation.

Selection Notes

Select the AD7836ASZ when a system requires four synchronized 14-bit voltage outputs with high DC accuracy. Ensure the design accommodates the required three-supply configuration (+15 V, -15 V, and +5 V). Verify that the parallel interface timing requirements, specifically the 15 ns setup time for address lines, align with the host microcontroller or DSP capabilities. Consider the 16 µs settling time for bandwidth limitations in dynamic applications.

Part Context

The AD7836 belongs to the LC2MOS family of data converters from Analog Devices. This technology combines CMOS digital logic with linear bipolar processes to achieve high speed and low power consumption. The AD7836 serves as a quad-channel counterpart to single-channel devices like the AD7840, offering density advantages for multi-axis motion control or multi-channel signal simulation tasks.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with legacy parts such as the AD7836AS or AD7836AR only if datasheet electrical parameters and pinouts are identical, though these variants may differ in temperature range or packaging material.