AD7226KPZ-REEL

Overview

The AD7226KPZ-REEL is a quad 8-bit voltage-output digital-to-analog converter (DAC) fabricated in LC2MOS process. It integrates four DACs with output buffer amplifiers and interface logic on a single chip, requiring no external trims. The device features separate on-chip latches for each DAC, accessed via a common 8-bit TTL/CMOS compatible input port controlled by A0, A1, and WR signals. Each buffer amplifier can drive up to 5 mA of output current and has laser-trimmed offsets. Specified performance is guaranteed for reference voltages from 2 V to 12.5 V with dual supplies or 10 V with a single supply. The part operates over an extended temperature range of -40°C to +85°C.

Feature Summary

• Four independent 8-bit DACs with integrated buffered output amplifiers
• Microprocessor-compatible parallel interface with individual data latches
• Laser-trimmed amplifier offsets eliminate need for user calibration
• Single-supply operation capability with TTL/CMOS logic compatibility

Applications

• Process control systems
• Automatic test equipment
• Automatic calibration of large system parameters such as gain and offset

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the 'K' version designation corresponds to the required -40°C to +85°C operating temperature range. Ensure the PLCC-20 package footprint matches the PCB design constraints. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when multiple low-cost, moderate-speed DAC channels are needed in a compact form factor. The AD7226 is suitable for applications requiring precise matching between channels due to monolithic fabrication. Consider the 4 µs settling time and 8-bit resolution against system requirements. Verify power supply constraints, as optimal performance with negative sink capability requires a negative VSS rail.

Part Context

The AD7226 belongs to Analog Devices' LC2MOS family of high-speed analog-digital mixed-signal converters. It is functionally similar to the AD7228 but offers four channels instead of eight. The KPZ suffix denotes the PLCC-20 plastic leaded chip carrier package. The REEL suffix specifies the reel packaging format for automated surface-mount assembly.

Replacement Considerations

The AD7228KPZ is a pin-compatible alternative offering eight channels instead of four. Other quad-channel options include the AD7226KNZ in DIP-20 packaging. Verify interface logic compatibility and thermal dissipation requirements when substituting packages.