AD7225LP-REEL

Overview

The AD7225LP-REEL is a quad 8-bit voltage-output digital-to-analog converter (DAC) fabricated on LC2MOS technology. It integrates four DACs with output buffer amplifiers and double-buffered interface logic on a single monolithic chip. Each channel features a separate reference input, allowing independent configuration. The device supports simultaneous update of all outputs via the LDAC signal and operates with single or dual supplies. Key electrical parameters include a settling time of 4 µs max, ±1 LSB relative accuracy for L/C versions, and TTL/CMOS compatible digital inputs.

Feature Summary

• Four independent 8-bit DACs with integrated output buffer amplifiers
• Separate reference input terminal for each DAC channel
• Double-buffered interface logic enabling simultaneous multi-channel updates
• Compatible with single (+15 V) or dual (+15 V/−5 V) power supplies

Applications

• Programmable transversal filters
• Digital word multiplication circuits
• Microprocessor-controlled analog signal generation

Procurement Notes

Verify the 'REEL' suffix indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm the 'L' version designation corresponds to the specified performance grades in Table 1 of the datasheet. Ensure supply voltages adhere to the absolute maximum ratings to prevent device damage.

Selection Notes

Select this component for applications requiring four isolated 8-bit voltage outputs with high-speed settling. The L/C versions offer improved static performance (±1/2 LSB relative accuracy) compared to K/B versions. Ensure the reference voltage range (2 V to VDD − 4 V) aligns with the system's available reference sources.

Part Context

The AD7225 is part of Analog Devices' LC2MOS family of precision data converters. The LP variant specifically denotes the PLCC package option within the broader AD7225 product line, which also includes PDIP, SOIC, and SSOP packages. This integration reduces board space requirements compared to discrete DAC and amplifier solutions.

Replacement Considerations

Direct substitutes include other AD7225 variants such as AD7225CRSZ or AD7225ARZ, provided the package type and temperature grade match the design requirements. Verify pin compatibility and electrical specifications against the specific revision of the datasheet.