AD7834BNZ

Overview

The AD7834BNZ 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 16-bit data formats. Key electrical specifications include a maximum output voltage span of 14 V with a range of ±8.192 V, a typical settling time of 10 µs to ±1/2 LSB, and relative accuracy of ±1 LSB (B grade). It operates on dual analog supplies (±15 V or ±12 V) and a 5 V logic supply.

Feature Summary

• Quad 14-bit resolution with R-2R segmented architecture
• Serial interface (SPI-compatible) with user-assigned addressing via PA0-PA4 pins
• Asynchronous CLR input for setting outputs to Device Sense Ground (DSG)
• Power-on reset function holding outputs within ±2 V of DSG potential

Applications

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

Procurement Notes

Verify the B-grade suffix indicates ±1 LSB relative accuracy compared to the standard A-grade. Confirm the BNZ designation corresponds to the 28-lead PDIP package type. Check current manufacturing status as older revisions may be obsolete.

Selection Notes

Select this component when a quad-channel 14-bit DAC with serial control is required. Ensure the application supports the specified ±15 V or ±12 V analog supply rails and 5 V logic levels. Verify that the 10 µs settling time meets system timing requirements.

Part Context

The AD7834 series belongs to Analog Devices' LC2MOS family of precision DACs. It is functionally distinct from the parallel-input AD7835 variant. The 'N' suffix typically denotes the PDIP package, while 'Z' indicates RoHS compliance.

Replacement Considerations

Direct substitute: AD7834ANZ (A-grade accuracy). Alternative packages: AD7834ARZ (SOIC).