AD7224KRZ-18REEL

Overview

The AD7224KRZ-18REEL is an 8-bit voltage-output digital-to-analog converter (DAC) with integrated output amplifiers, fabricated on a monolithic LC2MOS CMOS chip. It features double-buffered interface logic for simultaneous updates in multi-DAC systems and operates with single or dual supplies. The device guarantees low total unadjusted error of less than 1 LSB over temperature without external trimming. Key electrical parameters include a settling time of 5 µs to ±1/2 LSB for positive full-scale changes and 7 µs for negative changes under dual supply conditions. The output amplifier can drive loads down to 2 kΩ.

Feature Summary

• Integrated 8-bit DAC and unity gain output amplifier on a single LC2MOS CMOS chip
• Double buffered interface logic allowing simultaneous update of multiple devices
• Low total unadjusted error of less than 1 LSB over the operating temperature range
• Compatible with TTL and 5 V CMOS logic levels

Applications

• Microprocessor-based data acquisition systems requiring simultaneous multi-channel updates
• Programmable power supplies and signal generators
• Industrial process control loops utilizing zero override calibration cycles

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging rather than tube packaging when sourcing this specific part number. Confirm the K version temperature range (-40°C to +85°C) matches the application requirements. Ensure reference voltage constraints are met, specifically that VREF remains at least 4V below VDD for specified performance.

Selection Notes

Select this component for applications requiring high reliability through monolithic integration rather than multi-chip solutions. Choose the KRZ variant for surface mount assembly compatibility. Consider dual supply operation if improved zero code performance and negative-going slew rate are required compared to single supply configurations.

Part Context

This part belongs to the AD7224 family of precision 8-bit DACs. The 'K' suffix denotes the commercial temperature grade (-40°C to +85°C). The 'R' indicates the SOIC package option, while 'Z' typically signifies lead-free compliance. The 'REEL' suffix specifies the bulk packaging format for automated assembly.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD7224LR-18 for lower error specifications. For octal configurations, the AD7228 series may be considered if multiple channels are needed, though interface logic differs.