AD7247ABRZ-REEL

Overview

The AD7247ABRZ-REEL is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 24-lead SOIC. It integrates on-chip voltage reference and output amplifiers, eliminating the need for external trimming. The device features a parallel loading structure with 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. Key performance metrics include a typical settling time of 5 µs, ±0.9 LSB maximum differential nonlinearity, and ±1 LSB maximum integral nonlinearity.

Feature Summary

• Dual 12-bit CMOS DAC architecture with integrated 5 V Zener reference and buffered output amplifiers
• Parallel interface with independent Chip Select (CSA/CSB) and common Write (WR) inputs for direct microprocessor connection
• Configurable output ranges: 0 V to +5 V, 0 V to +10 V (unipolar), and ±5 V (bipolar)
• Low power consumption with typical IDD of 15 mA and ISS of 5 mA

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 REEL suffix indicates tape-and-reel packaging suitable for automated assembly. Confirm the 'B' grade designation corresponds to the specified ±10% power supply tolerance and industrial temperature range (-40°C to +85°C). Ensure compatibility with the 24-SOIC footprint during PCB layout.

Selection Notes

Select this component over the AD7237A when a full 12-bit parallel interface is required rather than an 8-bit bus structure. Consider the bipolar ±5 V capability if negative output swings are necessary. Verify that the 5 µs typical settling time meets system speed requirements compared to slower alternatives.

Part Context

This part belongs to the AD7237A/AD7247A DACPORT family, which enhances the industry-standard AD7237/AD7247 with improved interface speeds and wider supply voltage operation. The AD7247 variant specifically provides a true 12-bit parallel interface, distinguishing it from the double-buffered 8-bit interface of the AD7237.

Replacement Considerations

The AD7247AARZ-REEL7 is a compatible alternative within the same series, offering identical electrical specifications but potentially different manufacturing lot characteristics. Both parts share the same pinout and functional logic.