AD7837ARZ-REEL

Overview

The AD7837ARZ-REEL is a dual 12-bit monolithic digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates two complete MDACs with output amplifiers in a 24-lead SOIC package. The device features a parallel loading structure designed for microprocessors with 8-bit data buses, utilizing separate least-significant and most-significant input latches per channel. Key electrical specifications include a typical settling time of 3 µs to within ±1/2 LSB, a slew rate of 11 V/µs, and a unity gain small-signal bandwidth of 750 kHz. It operates on dual power supplies ranging from ±14.25 V to ±15.75 V.

Feature Summary

• Dual 12-bit resolution with integrated buffered voltage outputs
• Parallel interface architecture with separate MSB and LSB input latches
• Simultaneous update capability via asynchronous LDAC control
• High channel-to-channel isolation of -95 dB typ

Applications

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

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm the 'A' version designation corresponds to the specified ±1 LSB relative accuracy and the -40°C to +85°C operating temperature range. Ensure ESD precautions are observed during handling as the device is sensitive to electrostatic discharge.

Selection Notes

Select the AD7837ARZ-REEL over the AD7847 if an 8-bit microprocessor interface is required, as the AD7837 supports word input loading with separate address lines. Verify that the external feedback resistor connection requirement for the AD7837 aligns with the PCB layout, unlike the internally compensated AD7847. Ensure the system can provide the necessary ±15 V supply rails and decoupling capacitors.

Part Context

This component belongs to the AD7837/AD7847 family of high-speed DACs. The AD7837 variant is distinguished by its specific input latch structure optimized for 8-bit bus systems, whereas the AD7847 uses independent chip selects for each channel. The ARZ suffix denotes the SOIC-24 package with lead-free composition and RoHS compliance.

Replacement Considerations

Public confirmed substitute part numbers: AD7837BRZ, AD7837ANZ, AD7837BNZ.