AD7224KRZ-1REEL

Overview

The AD7224KRZ-1REEL is an 8-bit voltage-output digital-to-analog converter (DAC) with integrated output amplifiers, fabricated on a monolithic 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 a total unadjusted error of less than 1 LSB over the operating temperature range. Key specifications include a settling time of 5 µs to ±1/2 LSB, a reference input range of +2 V to +12.5 V, and TTL/CMOS compatible logic inputs. The part is housed in a 20-lead SOIC package.

Feature Summary

• Integrated 8-bit DAC and unity gain output amplifier on a single LC2MOS CMOS chip
• Double-buffered interface allowing simultaneous update of multiple devices
• Low total unadjusted error of ±1 LSB maximum over temperature
• Operates from single (+15 V) or dual (+15 V/-5 V) power supplies

Applications

• Microprocessor-based data acquisition systems
• Programmable voltage sources and current loops
• Process control instrumentation
• Waveform generation circuits

Procurement Notes

Verify the ordering suffix 'REEL' indicates tape-and-reel packaging rather than tube. Confirm the '-1' suffix corresponds to the specific pinout and performance grade defined in the manufacturer's ordering guide. Ensure compatibility with the required temperature range and supply voltage conditions specified in the datasheet before procurement.

Selection Notes

Select this component when an integrated DAC and buffer are required to minimize board space and component count. Choose the dual-supply configuration for improved zero-code error and negative-going settling time. Ensure the reference voltage source can drive the minimum 8 kΩ input impedance without significant droop during code transitions.

Part Context

The AD7224 belongs to Analog Devices' family of precision CMOS DACs. The KRZ-1 variant specifically denotes the 20-lead SOIC package option with extended industrial temperature capabilities. This model replaces older discrete DAC-amplifier solutions by integrating both functions on one die, reducing power consumption and improving reliability through the LC2MOS process.

Replacement Considerations

Direct pin-compatible replacements within the same package may include other AD7224 variants such as the AD7224LR-1 for tube packaging or different temperature grades. Verify that any substitute maintains the double-buffered interface timing requirements and output drive capabilities.