AD7847BR-REEL

Overview

The AD7847BR-REEL is a dual 12-bit monolithic digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates two independent DAC channels with internal output amplifiers in a 24-lead SOIC package. The device operates on dual power supplies ranging from ±12 V to ±15 V and features a parallel interface controlled by separate chip select inputs for each channel. Key electrical specifications include a maximum relative accuracy of ±1/2 LSB, a typical voltage output settling time of 3 µs, and a unity gain small signal bandwidth of 750 kHz. The component supports industrial temperature ranges from -40 °C to +85 °C.

Feature Summary

• Dual 12-bit resolution with integrated output amplifiers
• ±1/2 LSB maximum relative accuracy (B Version)
• Parallel interface with independent CSA and CSB chip selects
• Internal feedback resistors and 3 µs typical settling time

Applications

• Programmable gain amplifier circuits
• Analog panning circuits for audio applications
• Microprocessor interfacing via memory-mapped systems

Procurement Notes

Verify the 'R' suffix indicates the SOIC-24 package and the 'BRZ' designation confirms RoHS compliance and lead-free status. Confirm the '-REEL' suffix corresponds to tape and reel packaging quantities as specified in the manufacturer's ordering guide. Ensure the B version accuracy rating matches the specific application requirements.

Selection Notes

Select the AD7847BR over the AD7837 when independent chip select lines are required for each DAC channel rather than shared control logic. Choose the B version for applications requiring ±1/2 LSB relative accuracy instead of the A version's ±1 LSB specification. Verify that the system power supply allows for the required ±15 V operation or reduced ±12 V functionality.

Part Context

This component belongs to the AD7837/AD7847 family of dual 12-bit DACs. The AD7847 variant distinguishes itself from the AD7837 by providing dedicated Chip Select inputs (CSA and CSB) for each channel, simplifying parallel microprocessor interfacing compared to the address-latch architecture of the AD7837.

Replacement Considerations

Public confirmed substitute part numbers: AD7847AR, AD7847AQ, AD7847AN.