AD7849BR-REEL

Overview

The AD7849BR-REEL is a 16-bit serial input multiplying digital-to-analog converter (DAC) from Analog Devices. It features guaranteed monotonicity over the specified temperature range and versatile serial interface control via three lines, facilitating opto-isolated applications. The device includes internal or external output control during power-up and power-down sequences, clamping VOUT to 0 V. It supports both unipolar and bipolar output ranges, clearing to 0 V in either configuration. The part operates with analog supplies of ±14.25 V to ±15.75 V and a digital supply of 4.75 V to 5.25 V, housed in a 20-lead SOIC package.

Feature Summary

• 16-bit resolution with guaranteed monotonicity
• Versatile 3-wire serial interface with daisy-chain capability
• Output clamped to 0 V during power transitions
• Configurable binary or two's complement coding

Applications

• Industrial process controls
• PC analog I/O boards
• Instrumentation systems

Procurement Notes

Verify the specific grade B variant specifications against the official datasheet, as performance metrics like differential nonlinearity and gain error differ between A, B, and C grades. Confirm that the REEL suffix indicates tape-and-reel packaging suitable for automated assembly processes. Ensure compatibility with the required ±15 V analog supply rails and 5 V logic levels before integration.

Selection Notes

Select this component when 16-bit accuracy and low glitch impulse are required in a serially controlled environment. The AD7849 is suitable for designs needing precise output control during power cycles to prevent actuator movement. Consider the 20-lead SOIC footprint and the need for external reference voltage conditioning if high precision is mandated across the full temperature range.

Part Context

The AD7849 series comprises 14-bit/16-bit multiplying DACs designed for high-performance data acquisition. The BR-REEL designation specifies the B-grade version, which offers 16-bit resolution, packaged in a 20-lead SOIC and supplied in reel format. This part belongs to a family known for its robust reset logic and flexible serial interfacing options for multi-channel systems.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7849ARZ and AD7849CRZ. Note that the A-grade variant provides only 14-bit resolution, while the C-grade offers different linearity specifications. Verify that any substitute maintains the 16-bit monotonicity requirement and compatible supply voltage ranges.