AD7841BSZ-REEL

Overview

The AD7841BSZ-REEL 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 straight binary parallel data via DB0–DB13 and utilizes address pins A0–A2 for channel selection. Outputs are buffered with gain-of-two amplifiers, supporting a full-scale range of ±10 V when supplied with ±5 V reference voltages. Key specifications include a maximum relative accuracy of ±2 LSB (B grade), a settling time of 31 µs, and power supply requirements of +5 V logic, +15 V analog positive, and –15 V analog negative.

Feature Summary

• Octal Architecture: Contains eight independent 14-bit DACs on one chip.
• Parallel Interface: Accepts 14-bit parallel data loaded into input registers under WR/CS control.
• Offset Adjustment: Each DAC pair includes DUTGND inputs for external offset voltage insertion.
• Simultaneous Update: All outputs update simultaneously when the LDAC pin is asserted low.

Applications

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

Procurement Notes

Verify that the B-grade suffix corresponds to the required accuracy specifications, specifically the ±2 LSB maximum relative accuracy. Confirm the REEL suffix indicates tape-and-reel packaging suitable for automated assembly processes. Ensure the 44-lead MQFP footprint matches the target PCB design constraints.

Selection Notes

Select this component for applications requiring multiple synchronized voltage outputs with high resolution. The B-grade version offers tighter linearity tolerances compared to the A-grade. Designers must account for the specific power sequencing requirements, ensuring VDD/VSS precede VCC to prevent latch-up or high current states during startup.

Part Context

This part belongs to the AD7841 family of octal DACs. The 'BSZ' designation identifies the B-grade performance variant packaged in lead-free MQFP, while '-REEL' specifies the reel packaging format. It serves as a multi-channel solution for systems needing precise analog voltage generation from digital bus interfaces.

Replacement Considerations

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