AD7224KNZ

Overview

The AD7224KNZ is an 8-bit voltage-output digital-to-analog converter (DAC) with integrated output amplifiers, fabricated on Analog Devices' LC2MOS process. It features a double-buffered interface for simultaneous updates in multi-DAC systems and operates from single or dual supplies. Key electrical parameters include a total unadjusted error of ±2 LSB maximum, a settling time of 5 µs to ±1/2 LSB for positive full-scale changes, and a reference input range of +2 V to +12.5 V. The device draws 4 mA typical supply current and supports TTL/CMOS logic levels.

Feature Summary

• Monolithic 8-bit DAC with unity-gain output amplifier on LC2MOS CMOS chip
• Double-buffered interface allows simultaneous update of multiple devices
• Low total unadjusted error of ±2 LSB max over temperature range
• Compatible with single (+15 V) or dual (+15 V/-5 V) power supplies

Applications

• Microprocessor-based data acquisition systems
• Programmable gain amplifiers and variable voltage sources
• Waveform generation and signal processing circuits
• Industrial control and instrumentation interfaces

Procurement Notes

Verify the suffix 'KNZ' against the official ordering guide, as standard listings specify 'KN' for the plastic DIP package. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as historical data indicates leaded variants. Ensure ESD precautions are observed during handling due to the MOS gate structure.

Selection Notes

Select the AD7224KNZ when an integrated solution combining an 8-bit DAC and buffer amplifier is required to minimize component count. Choose this part for applications needing double buffering for synchronized multi-channel updates. Verify that the ±2 LSB total unadjusted error meets system accuracy requirements compared to higher-precision variants like the AD7224LN.

Part Context

The AD7224 belongs to the AD722x family of precision DACs utilizing Linear Compatible CMOS technology. This process integrates high-speed digital logic with precision analog circuits on a single die. The KN variant specifically denotes the commercial temperature range (-40°C to +85°C) housed in an 18-pin plastic DIP package.

Replacement Considerations

The AD7224LN offers identical functionality with improved accuracy (±1 LSB max total unadjusted error). For surface mount requirements, consider the AD7224KR-1 in SOIC packaging. Military-grade versions are available by adding /883B to the part number.