AD7245AAPZ-REEL

Overview

The AD7245AAPZ-REEL is a 12-bit voltage-output digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices Inc. It integrates an output amplifier and a buried Zener voltage reference on a monolithic CMOS chip. The device operates with supply voltages ranging from +10.8 V to +16.5 V for both analog and digital sections. Key electrical parameters include a typical settling time of 7 µs, a differential nonlinearity (DNL) of ±1 LSB, and an integral nonlinearity (INL) of ±0.75 LSB. It features a parallel interface structure and delivers buffered voltage outputs.

Feature Summary

• 12-bit resolution with integrated output amplifier and internal 5 V reference
• Parallel data interface with double-buffered logic and asynchronous LDAC control
• Extended temperature range operation from -40°C to +85°C
• Low power consumption with typical 65 mW dissipation in single-supply mode

Applications

• Industrial process control systems requiring precise voltage generation
• Test and measurement equipment needing stable analog signal sources
• Microprocessor-based systems interfacing via standard parallel buses

Procurement Notes

Verify the specific ordering suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the A-grade specification meets the required linearity accuracy of ±3/4 LSB maximum relative accuracy at 25°C. Ensure supply voltage rails are maintained within the +10.8 V to +16.5 V range for specified performance.

Selection Notes

Select this component for applications requiring a complete 12-bit DAC solution without external trimming. Compare against the AD7248A if an 8-bit wide microprocessor bus interface is preferred over the 12-bit parallel input. Consider the PLCC-28 package constraints for surface-mount assembly and verify thermal dissipation limits under maximum load conditions.

Part Context

This part belongs to the enhanced AD7245A/AD7248A series, which improves upon the original industry-standard parts. The AD7245A variant specifically utilizes an 8+4 bit loading structure for its 12-bit parallel data interface. It is fabricated using linear compatible CMOS (LC2MOS) technology to combine precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7245ABPZ offers improved linearity accuracy of ±1/2 LSB compared to the ±3/4 LSB of the AA grade. For dual-channel requirements, the AD7248A provides similar functionality but with an 8-bit wide data bus interface structure instead of 12-bit parallel.