AD7847AR-REEL

Overview

The AD7847AR-REEL is a dual, 12-bit multiplying digital-to-analog converter (MDAC) with integrated output amplifiers. It features an R-2R segmented architecture and parallel loading structure using separate chip selects for each channel. The device operates on ±15 V power supplies (range ±14.25 V to ±15.75 V) and supports an industrial temperature range of -40°C to +85°C. Key electrical specifications include a typical voltage output settling time of 3 µs, a slew rate of 11 V/µs, and unity gain small-signal bandwidth of 750 kHz. Relative accuracy is specified at ±1 LSB maximum.

Feature Summary

• Dual 12-bit MDACs with internal output amplifiers
• Parallel interface with independent CSA and CSB inputs
• Internal feedback resistors connected to VOUT pins
• ±1 LSB relative accuracy and guaranteed monotonicity

Applications

• Automatic Test Equipment
• Function Generation
• Waveform Reconstruction
• Programmable Power Supplies
• Synchro Applications

Procurement Notes

Verify the 'REEL' suffix indicates tape-and-reel packaging upon order confirmation. Confirm that the 'AR' designation corresponds to the SOIC-24 package variant. Ensure supply voltages match the specified ±15 V requirement for optimal performance.

Selection Notes

Select this model over the AD7837 when independent chip select lines are required for each DAC channel rather than address-based selection. Verify that the system requires parallel data input and that the 3 µs settling time meets the application speed requirements.

Part Context

This component belongs to the AD7837/AD7847 family of complete dual 12-bit multiplying DACs. The AD7847 variant distinguishes itself from the AD7837 by utilizing a direct 12-bit parallel load structure with individual chip selects, whereas the AD7837 uses an 8-bit plus 4-bit loading scheme with address lines.

Replacement Considerations

Public confirmed substitute part numbers: AD7847BRZ, AD7847ANZ.