AD7834ARZ-REEL

Overview

The AD7834ARZ-REEL is a quad 14-bit digital-to-analog converter (DAC) from Analog Devices, utilizing LC2MOS technology. It features four independent voltage outputs with a maximum span of 14 V and a range of ±8.192 V. The device employs serial data loading via DIN, SCLK, and FSYNC pins, supporting up to 32 individually addressed units through dedicated package address pins (PA0–PA4). Key electrical specifications include a typical settling time of 10 µs, relative accuracy of ±2 LSB, and differential nonlinearity of ±0.9 LSB. It operates on dual analog supplies (±15 V nominal) and a 5 V digital supply.

Feature Summary

• Quad 14-bit resolution with R-2R architecture
• Serial interface with user-assigned addressing for multi-device systems
• Asynchronous clear function to Device Sense Ground (DSG)
• Power-on reset holds outputs within ±2 V of DSG potential

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 Z suffix denotes RoHS compliance. Check current manufacturing status as older variants may be obsolete. Ensure the specific reel quantity matches system requirements.

Selection Notes

Select this component for applications requiring multiple high-resolution voltage outputs in a single package. The serial interface reduces pin count compared to parallel alternatives like the AD7835. Verify that the ±15 V analog supply rails are available in the target design. Consider the 10 µs settling time for bandwidth requirements.

Part Context

This part belongs to the AD7834/AD7835 family of LC2MOS DACs. The AD7834 variant specifically uses serial input loading, whereas the AD7835 uses parallel loading. The ARZ designation specifies the SOIC-28 surface-mount package with lead-free/RoHS construction. The REEL suffix indicates bulk tape packaging.

Replacement Considerations

Direct substitutes include other quad 14-bit serial DACs from Analog Devices such as the AD5734 series, though interface protocols and pinouts may differ. Verify compatibility with existing serial bus timing and voltage levels.