AD7224LNZ

Overview

The AD7224LNZ is an 8-bit CMOS digital-to-analog converter (DAC) with integrated output amplifiers, manufactured by Analog Devices Inc. It operates within a temperature range of –40 °C to +85 °C and features a total unadjusted error of ±1 LSB maximum at VDD = +15 V ± 5% and VREF = +10 V. The device utilizes Linear Compatible CMOS (LC2MOS) fabrication for low power consumption, typically 35 mW with a single supply. It supports both single and dual supply configurations, with specified performance guaranteed for reference voltages from +2 V to +12.5 V under dual supply conditions. The part includes double buffered interface logic for simultaneous updates in multi-DAC systems.

Feature Summary

• Integrated 8-bit DAC and unity gain noninverting CMOS amplifier on a monolithic chip
• Double buffered interface logic allowing simultaneous update across multiple devices
• Low total unadjusted error of ±1 LSB max over the operating temperature range
• TTL and 5 V CMOS level compatible digital inputs

Applications

• Microprocessor-based data acquisition systems requiring simultaneous multi-channel updates
• Battery-powered instrumentation utilizing single supply operation
• Industrial control loops requiring precise voltage generation
• System calibration cycles utilizing zero override functionality

Procurement Notes

Verify the ordering suffix 'N' corresponds to the 18-pin plastic DIP package option as defined in the manufacturer's ordering guide. Confirm that the specific revision of the datasheet matches the production lot requirements. Ensure that ESD precautions are strictly followed during handling due to the MOS gate input structure. Validate that the application environment remains within the specified commercial temperature range of –40 °C to +85 °C.

Selection Notes

Select the AD7224LNZ when a total unadjusted error of ±1 LSB is required compared to the ±2 LSB variant. This model is suitable for applications needing the 18-pin plastic DIP package. Consider the dual supply configuration if improved zero code performance and slew rate are necessary, as single supply operation reduces sink capability near AGND. Ensure the reference voltage source can maintain low output impedance under varying load conditions.

Part Context

The AD7224LNZ belongs to the AD7224 family of 8-bit voltage-output DACs. It shares the same core LC2MOS architecture and functional block diagram with other variants such as the AD7224KN and AD7224LR-1. The primary distinctions between these models lie in their accuracy specifications, temperature ranges, and physical package options. The 'L' designation indicates the higher precision tier within the standard temperature range lineup.

Replacement Considerations

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