AD7225LRZ-REEL

Overview

The AD7225LRZ-REEL is a quad 8-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates four voltage output DACs with buffer amplifiers and interface logic on a single LC2MOS chip. The device features separate reference inputs for each channel, double-buffered inputs for microprocessor compatibility, and simultaneous update capability via the LDAC pin. It operates with single or dual supplies, supporting VDD ranges from 11.4 V to 16.5 V and VSS at -5 V. Key electrical parameters include a settling time of 4 µs max, ±1 LSB DNL, and ±1/2 LSB relative accuracy for L/C versions. The component is housed in a 24-lead SSOP package.

Feature Summary

• Quad 8-bit DAC architecture with integrated output buffer amplifiers
• Separate reference input terminals for each DAC channel
• Double-buffered interface logic allowing simultaneous update of all outputs
• Compatible with TTL and 5 V CMOS digital logic levels

Applications

• Programmable transversal filters
• Digital word multiplication circuits
• Microprocessor-based control systems requiring multi-channel analog output

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging configuration. Confirm the L version designation corresponds to the specified performance grades, specifically ±1/2 LSB relative accuracy and ±1 LSB DNL. Ensure the SSOP package type matches the design footprint requirements.

Selection Notes

Select this component when four independent 8-bit voltage outputs are required with individual reference control. The L/C versions offer tighter accuracy specifications compared to K/B versions. Ensure the application supports the required supply voltages (VDD 11.4–16.5 V) and reference voltage range (2 V to VDD-4 V). Consider the 24-lead SSOP package constraints for board layout.

Part Context

The AD7225 belongs to the Analog Devices LC2MOS family of high-speed linear-compatible CMOS data converters. This process technology integrates precision analog circuitry with high-speed digital logic on a single monolithic chip. The AD7225 variant specifically provides quad 8-bit resolution, distinguishing it from octal or higher-resolution counterparts in the same product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.