AD7849AR

Overview

The AD7849AR is a 16-bit serial input multiplying digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It operates with analog supply voltages of ±15 V nominal and a digital supply of 5 V. The device features a versatile three-wire serial interface supporting standalone and daisy-chain configurations. Key electrical specifications include a typical output settling time of 7 μs to 0.006% FSR, a slew rate of 4 V/μs, and guaranteed monotonicity over the specified temperature range. The part is housed in a 20-lead SOIC package.

Feature Summary

• 16-bit resolution with guaranteed monotonicity
• Multiplying architecture with external reference inputs
• Versatile serial interface with daisy-chain capability
• Output clamped to 0 V during power-up/down sequences

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notices, as availability may be limited. Ensure proper handling for moisture-sensitive devices according to JESD-020 standards.

Selection Notes

Select the AD7849AR for applications requiring high-resolution voltage generation with serial control. Ensure supply rails match the ±15 V requirement for full-scale operation. Consider the A-grade variant if 14-bit resolution is sufficient, though the AR suffix typically denotes the standard commercial grade.

Part Context

The AD7849 belongs to the AD7849 series of multiplying DACs. It shares architectural similarities with other serial-input DACs from Analog Devices but is distinct in its specific 16-bit performance and dual-supply requirements. The 'AR' suffix indicates the SOIC-20 package and commercial temperature range.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided documentation. Evaluate other 16-bit serial DACs from Analog Devices such as the AD7840 or AD7844, ensuring compatibility with supply voltages and interface protocols.