AD7224LN

Overview

The AD7224LN is an 8-bit voltage-output digital-to-analog converter featuring a monolithic output amplifier and double-buffered interface logic. Fabricated using Linear Compatible CMOS (LC2MOS) technology, it operates with single or dual supplies. The device guarantees a total unadjusted error of ±1 LSB maximum over the –40°C to +85°C temperature range. It accepts binary input codes and produces an analog output proportional to the reference voltage. The integrated amplifier can drive loads down to 2 kΩ and capacitive loads up to 3300 pF. Control signals include CS, WR, LDAC, and RESET for flexible system integration.

Feature Summary

• Monolithic 8-bit DAC with integrated unity-gain output amplifier
• Total unadjusted error of ±1 LSB max over extended temperature range
• Double-buffered interface allows simultaneous updates in multi-DAC systems
• Compatible with TTL and 5V CMOS logic levels

Applications

• Microprocessor-based control systems requiring simultaneous multi-channel updates
• Precision instrumentation with single or dual supply requirements
• System calibration cycles utilizing zero override functionality
• Unipolar and bipolar signal generation circuits

Procurement Notes

Verify the specific suffix LN indicates the Plastic DIP package option N-18 and the commercial/industrial temperature range of –40°C to +85°C. Confirm that the ordering part number matches the required accuracy grade of ±1 LSB total unadjusted error. Ensure compatibility with the specified LC2MOS process characteristics during component selection.

Selection Notes

Select the AD7224LN when a low total unadjusted error of ±1 LSB is required compared to the ±2 LSB variant. Choose this model for applications needing the N-18 plastic DIP package. Consider dual supply operation if improved zero code performance and slew rate are necessary, as single supply mode reduces sink capability near ground. Ensure the reference voltage remains within the specified range relative to VDD.

Part Context

The AD7224 series includes variants with different accuracy grades and packages. The 'L' suffix denotes the ±1 LSB accuracy version, while 'N' specifies the 18-pin plastic DIP package. Other versions include 'K' for ±2 LSB accuracy and 'Q' for ceramic DIP packaging. The 'U' suffix indicates extended temperature range options. All share the same core LC2MOS architecture and functional block diagram.

Replacement Considerations

Direct replacements within the family include AD7224KN for higher accuracy tolerance applications. For surface mount needs, consider AD7224LR-1 or AD7224LP depending on the required accuracy and SOIC package preference. Verify pinout compatibility and thermal specifications when substituting.