AD421BRZ

Overview

The AD421BRZ is a 16-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features a single current output channel and operates on a supply voltage range of 2.95 V to 5.05 V for both analog and digital domains. The device utilizes a 3-wire serial interface for data transmission. Key performance metrics include an integral nonlinearity (INL) of +/- 0.01% FSR, a settling time of 8 ms, and a power dissipation of 1.95 mW. It supports both internal and external reference types and lacks a shutdown function. The component is housed in a 16-lead SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• 16-bit resolution with 1-channel current output
• 3-wire serial interface compatibility
• Integral nonlinearity (INL) of +/- 0.01% FSR
• Operating supply voltage range of 2.95 V to 5.05 V

Applications

• Industrial process control systems
• Programmable logic controller (PLC) I/O modules
• Data acquisition systems requiring high precision

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required operating temperature range and packaging format. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this component when a 16-bit resolution and low INL are required for current output applications. Confirm that the system power supply falls within the 2.95 V to 5.05 V range. Verify that the 3-wire interface aligns with the host microcontroller or DSP capabilities. Consider the 8 ms settling time if high-speed response is not critical.

Part Context

The AD421BRZ belongs to the AD421 series of 16-bit DACs from Analog Devices. This series is designed for general-purpose precision applications. The BRZ suffix typically indicates a lead-free RoHS-compliant variant in the SOIC-16 package. It serves as a standalone solution for converting digital codes into precise analog currents without requiring external amplifiers in many configurations.

Replacement Considerations

Consult Analog Devices documentation for verified cross-references. Generic replacements may differ in INL, settling time, or interface protocols. Ensure any substitute maintains the 16-bit resolution and compatible supply voltage range.