AD421BRRL7

Overview

The AD421BRRL7 is a 16-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features a single current output and operates on analog and digital supply voltages ranging from 2.95 V to 5.05 V. 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 external and internal reference configurations and lacks a shutdown function. The component is housed in a 16-lead SOIC package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• 16-bit resolution with 1 channel
• Current output type with 3-Wire interface
• Supply voltage range: 2.95 V to 5.05 V
• Integral nonlinearity: ±0.01% FSR

Applications

• Precision data acquisition systems
• Industrial process control
• Portable instrumentation

Procurement Notes

Verify the specific suffix 'RL7' against official Analog Devices documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure compatibility with existing PCB footprints for the SOIC-16 package. Cross-reference the part number with current manufacturer lifecycle notices to confirm availability status and any potential obsolescence warnings prior to procurement planning.

Selection Notes

Select this component when a 16-bit current-output DAC is required with a 3-wire serial interface. Verify that the system power supply falls within the 2.95 V to 5.05 V range for both analog and digital domains. Confirm that the 8 ms settling time meets the application's speed requirements. Check if the absence of a shutdown mode aligns with the system's power management strategy.

Part Context

The AD421BRRL7 belongs to the AD421 series of 16-bit DACs. It is distinct from voltage-output variants and higher-channel-count models within the same family. The 'B' grade indicates a specific accuracy class, while 'RRL7' denotes the reel packaging format. It serves as a precision conversion solution for applications requiring high linearity and low power consumption in industrial environments.

Replacement Considerations

Consult Analog Devices documentation for direct pin-compatible replacements or upgraded versions within the AD421 family. Verify electrical parameter equivalence for any substitute parts, particularly regarding INL, settling time, and supply voltage ranges.