AD7834AN

Overview

The AD7834AN is a monolithic quad 14-bit digital-to-analog converter (DAC) utilizing LC2MOS technology. It integrates four independent voltage-output DACs within a single 28-lead PDIP package. The device features serial data loading via DIN, SCLK, and FSYNC interfaces, allowing for efficient microprocessor interfacing. Key electrical specifications include a maximum relative accuracy of ±2 LSB and a typical output settling time of 10 µs. Power requirements consist of a 5 V logic supply (VCC) and dual analog supplies ranging from ±12 V to ±15 V (VDD/VSS).

Feature Summary

• Quad 14-bit resolution with R-2R segmented architecture.
• Serial input interface supporting up to 32 individually addressable devices via PA0-PA4 pins.
• Asynchronous CLR function forces all outputs to the Device Sense Ground (DSG) potential.
• Power-on reset ensures outputs remain within ±2 V of DSG during power stabilization.

Applications

• Process control systems requiring multi-channel signal generation.
• Automatic test equipment for precise voltage reference generation.
• General-purpose instrumentation involving data acquisition front-ends.

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm lot traceability and check for ESD sensitivity markings on packaging. Ensure storage conditions adhere to moisture sensitivity level (MSL) guidelines prior to soldering. Review datasheet revision history for any parameter updates affecting design compatibility.

Selection Notes

Select the AD7834AN when serial bus connectivity is preferred over parallel interfaces to reduce pin count. Choose this model if the application requires user-assigned device addressing for expanding channel counts beyond a single package. Verify that the required output voltage span fits within the ±8.192 V range or the maximum 14 V span capability defined by the reference inputs.

Part Context

The AD7834 series belongs to Analog Devices' LC2MOS family of high-performance data converters. It is functionally paired with the AD7835, which offers parallel loading capabilities in larger packages. The AD7834 specifically targets applications needing compact, multi-channel solutions where board space is constrained but 14-bit precision is mandatory.

Replacement Considerations

Direct functional substitutes include the AD7834AR (SOIC package variant) and the AD7834ANZ (RoHS-compliant version). Note that the AD7834AN is an older manufacturing code; verify current availability status as these components may be subject to end-of-life notices or require qualification for new production runs.