AD7834BRZ-REEL

Overview

The AD7834BRZ-REEL is a monolithic quad 14-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features four independent voltage-output DACs within a single package, utilizing LC2MOS technology for high performance. The device employs serial data loading via DIN, SCLK, and FSYNC pins, supporting MSB-first transmission in a 16-bit format following two leading zeros. It provides a maximum output voltage span of 14 V with a range of ±8.192 V. Key specifications include a 10 μs settling time, 14-bit resolution, and user-assigned device addressing via five dedicated address pins (PA0–PA4), allowing up to 32 devices to be individually addressed in multipackage applications.

Feature Summary

• Quad 14-bit DAC architecture with voltage outputs and a maximum span of 14 V.
• Serial input interface requiring DIN, SCLK, and FSYNC for 16-bit data loading.
• Five dedicated package address pins (PA0–PA4) enable individual addressing of up to 32 units.
• Integrated power-on reset function holds outputs within ±2 V of DSG potential during supply stabilization.

Applications

• Process control systems
• Automatic test equipment
• General-purpose instrumentation

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm the B grade accuracy specifications against application requirements, noting that relative accuracy is ±1 LSB max. Ensure the 28-lead SOIC package dimensions match the PCB footprint design. Check for RoHS compliance status as indicated in the ordering guide.

Selection Notes

Select the AD7834BRZ-REEL over the AD7835 if a serial interface is preferred over parallel loading. Verify that the system can accommodate the required three analog supplies: VCC (+5 V), VDD (+15 V or +12 V), and VSS (-15 V or -12 V). Consider the 10 μs settling time for bandwidth requirements. Ensure the reference voltage span falls between 5 V and 14 V for specified performance.

Part Context

The AD7834 is part of the AD7834/AD7835 family of LC2MOS quad DACs. While the AD7835 offers parallel 8-bit/14-bit loading options, the AD7834 is specifically designed for serial bus integration. Both share similar electrical characteristics, including 14-bit resolution and ±8.192 V output ranges, but differ primarily in their data input methods and pin configurations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.