AD7247AARZ-REEL

Overview

The AD7247AARZ-REEL is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 24-lead SOIC. It integrates two CMOS DACs with on-chip output amplifiers and a Zener voltage reference. The device features a parallel loading structure accepting 12-bit data via separate Chip Select inputs for each DAC and a common Write input. It operates from single or dual supplies ranging from +10.8 V to +16.5 V on VDD and 0 V to -16.5 V on VSS. Key performance metrics include a typical settling time of 5 µs, ±1 LSB relative accuracy, and low power consumption of 165 mW typ in single-supply mode.

Feature Summary

• Dual 12-bit DAC architecture with integrated output amplifiers and internal 5 V reference
• Parallel interface with independent Chip Select inputs for simultaneous or individual DAC control
• Wide supply range supporting single (+12 V to +15 V) or dual (±12 V to ±15 V) operation
• Fast interface with 30 ns typical data setup time and 5 µs typical settling time

Applications

• Industrial process control systems requiring precise analog signal generation
• Programmable gain amplifiers and variable voltage references
• Waveform generation and test equipment interfaces
• Microprocessor-based data acquisition systems

Procurement Notes

Verify the specific suffix REEL indicates tape-and-reel packaging when sourcing. Confirm the A-grade temperature range (-40°C to +85°C) matches application requirements. Ensure supply voltages remain within the specified +10.8 V to +16.5 V range for optimal performance. Check for ESD sensitivity precautions during handling and storage.

Selection Notes

Select the AD7247A over the AD7237A if a direct 12-bit parallel interface is required without double-buffering complexity. The AD7247A simplifies microprocessor interfacing by allowing full 12-bit writes in a single cycle. Consider the SOIC package for surface-mount applications where space is limited compared to DIP options.

Part Context

This component belongs to the AD7237A/AD7247A family of LC2MOS Dual 12-Bit DACPORTs. It serves as an enhanced version of the industry-standard AD7247, offering improved interface speeds and wider supply voltage tolerance. The part is designed to replace older multi-chip DAC solutions with a monolithic CMOS implementation.

Replacement Considerations

The AD7237A is a functional alternative but requires an 8-bit wide bus with double-buffered loading. Direct pin-compatible replacements within the same family include the AD7247ABRZ for tighter accuracy specifications.