AD7224KR-1

Overview

The AD7224KR-1 is an 8-bit voltage-output digital-to-analog converter (DAC) with integrated output amplifiers, fabricated in Linear Compatible CMOS (LC2MOS) technology. It features a double-buffered interface for simultaneous updates in multi-DAC systems and operates with single or dual supplies. The device guarantees a total unadjusted error of ±2 LSB maximum over the –40°C to +85°C temperature range. Key electrical parameters include a reference input voltage range of +2 V to (VDD – 4 V), a typical power consumption of 35 mW with a single supply, and a settling time of 5 μs for positive full-scale changes. The output amplifier can drive loads down to 2 kΩ.

Feature Summary

• Monolithic 8-bit DAC with unity-gain output amplifier on a single LC2MOS chip
• Double-buffered interface logic allowing simultaneous update of multiple devices
• Low total unadjusted error of ±2 LSB max over the commercial temperature range
• Compatible with TTL and 5 V CMOS logic levels

Applications

• Microprocessor-controlled data acquisition systems
• Programmable gain amplifiers
• Battery-powered instrumentation
• Process control loops requiring zero override functionality

Procurement Notes

Verify the suffix 'KR-1' corresponds to the R-20 package option and the K version temperature range of –40°C to +85°C with ±2 LSB total unadjusted error. Confirm that the ordering suffix does not imply a functional change unless explicitly stated in the manufacturer's documentation. Ensure ESD precautions are observed during handling due to the MOS gate inputs.

Selection Notes

Select the AD7224KR-1 when an 8-bit resolution with integrated buffering is required in a surface-mount SOIC package. Choose this variant over the LR-1 if the system design tolerates a higher total unadjusted error of ±2 LSB instead of ±1 LSB. Verify that the application requires the specific switching characteristics and power supply ranges defined for the K version within the LC2MOS process family.

Part Context

The AD7224 series comprises various packages and temperature grades manufactured using Analog Devices' LC2MOS process. The KR-1 designation specifically identifies the 20-lead Small Outline Integrated Circuit (SOIC) package variant within the commercial temperature grade. This part integrates both the D/A conversion and output amplification stages, distinguishing it from earlier multi-chip solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet.