AD7841BSZ

Overview

The AD7841BSZ is an octal 14-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates eight independent DAC channels within a single monolithic chip, housed in a 44-lead MQFP package. The device accepts parallel 14-bit data inputs and provides buffered analog outputs with a full-scale range of ±10 V when driven by ±5 V reference voltages. Key specifications include a maximum relative accuracy of ±2 LSB for the B-grade version, a typical output settling time of 31 µs, and a glitch impulse of 230 nV-s. Power requirements consist of a +5 V logic supply (VCC), a +15 V positive analog supply (VDD), and a -15 V negative analog supply (VSS).

Feature Summary

• Octal Architecture: Contains eight independent 14-bit DACs in one package.
• High Accuracy: B-grade version guarantees ±2 LSB maximum relative accuracy.
• Voltage Outputs: Buffered outputs capable of ±10 V swing with ±5 V references.
• Offset Adjustment: Dedicated DUTGND pins allow external offset adjustment for each DAC pair.

Applications

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

Procurement Notes

Verify the specific suffix 'B' indicates the industrial temperature grade (-40°C to +85°C) with ±2 LSB accuracy. Confirm the 'SZ' suffix denotes lead-free/RoHS compliance and the MQFP package type. Ensure power supply sequencing follows the recommended order of VDD/VSS followed by VCC to prevent high current states during startup.

Selection Notes

Select the AD7841BSZ over the A-grade variant if tighter linearity specifications are required, specifically the ±2 LSB relative accuracy compared to ±4 LSB. This component is suitable for applications requiring multiple synchronized voltage outputs. Ensure the system design accommodates the three-supply requirement (+5 V, +15 V, -15 V) and the 44-lead MQFP footprint.

Part Context

The AD7841 series consists of octal 14-bit DACs available in various packages including MQFP and DIP. The AD7841BSZ specifically refers to the B-grade performance version in the 44-lead MQFP package. It is part of a family that includes variants like the AD7841ASZ and AD7841BS, differentiated primarily by accuracy grades and packaging options.

Replacement Considerations

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