AD7224KPZ

Overview

The AD7224KPZ is an 8-bit voltage-output digital-to-analog converter (DAC) featuring a monolithic CMOS output amplifier and double-buffered interface logic. It operates with single or dual supplies, delivering a total unadjusted error of ±2 LSB maximum over the commercial temperature range (-40°C to +85°C). The device utilizes Linear Compatible CMOS (LC2MOS) fabrication for low power consumption and high reliability. Key electrical parameters include a reference input range of +2 V to +(VDD – 4 V), a typical settling time of 5 μs for positive full-scale changes, and a voltage output slew rate of at least 2.5 V/μs. It supports binary coding and TTL/CMOS compatible logic inputs.

Feature Summary

• Integrated 8-bit DAC with unity-gain output amplifier on a single LC2MOS CMOS chip
• Double-buffered interface allowing simultaneous updates in multi-DAC systems
• Low total unadjusted error of ±2 LSB max over temperature range
• Compatible with TTL and 5 V CMOS logic levels

Applications

• Microprocessor-based data acquisition systems
• Programmable gain amplifiers
• Battery-powered instrumentation
• Process control loops

Procurement Notes

Verify the specific package suffix 'P' corresponds to the Plastic Leaded Chip Carrier (PLCC) option when sourcing. Confirm that the K version meets the required -40°C to +85°C operating temperature range. Ensure ESD precautions are observed during handling as the device is sensitive to electrostatic discharge.

Selection Notes

Select this component for applications requiring an integrated output buffer without external op-amps. The K suffix indicates the commercial temperature grade; choose B, C, T, or U suffixes if industrial or extended temperature ranges are needed. Verify supply voltage constraints, as specified performance requires VREF to be at least 4 V below VDD.

Part Context

The AD7224 belongs to Analog Devices' LC2MOS family of precision DACs. The KPZ variant specifically denotes the Plastic Leaded Chip Carrier package within the standard AD7224 lineup. Other variants include DIP, SOIC, and Cerdip packages, offering flexibility for different board layout requirements while maintaining identical core electrical characteristics.

Replacement Considerations

Direct pin-compatible replacements within the same series include AD7224LPZ (±1 LSB accuracy) or other package variants like AD7224KRZ. For higher resolution needs, consider the AD7228 octal DAC family.