AD7224LP-REEL

Overview

The AD7224LP-REEL 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 ±1 LSB maximum over the commercial temperature range (-40°C to +85°C). Key electrical parameters include a settling time of 5 µs for positive full-scale changes and 7 µs for negative changes, with a typical power consumption of 35 mW under single-supply conditions.

Feature Summary

• Integrated 8-bit DAC and unity-gain output amplifier on a monolithic LC2MOS chip
• Double-buffered input and DAC registers enable simultaneous update capabilities
• Low total unadjusted error of ±1 LSB max over temperature range
• Compatible with TTL and 5V CMOS logic levels

Applications

• Portable instrumentation requiring low power consumption
• Battery-powered systems utilizing single-supply operation
• Microprocessor-based control loops requiring simultaneous multi-channel updates
• System calibration cycles utilizing zero override function

Procurement Notes

Verify that the 'REEL' suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific temperature grade associated with the 'LP' designation corresponds to the required operational environment. Ensure ESD precautions are observed during handling as the device is sensitive to electrostatic discharge.

Selection Notes

Select the AD7224LP variant for applications requiring ±1 LSB total unadjusted error within the -40°C to +85°C range. Choose this part over higher-resolution models if system complexity and cost must be minimized while maintaining monotonicity. Verify that the reference voltage source can maintain low output impedance across the code-dependent input capacitance variations.

Part Context

The AD7224 series utilizes Linear Compatible CMOS (LC2MOS) process technology, allowing high-speed digital logic and precision analog circuits to coexist on a single die. This integration reduces component count compared to discrete DAC and amplifier solutions. The LP suffix specifically denotes the Plastic Leaded Chip Carrier (PLCC) package option with extended accuracy specifications.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7224LN (Tube), AD7224KP, and AD7224KR-1 variants. When substituting, verify that the replacement part matches the required package type and temperature range specifications.