AD7245JPZ-REEL

Overview

The AD7245JPZ-REEL is a 12-bit CMOS digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices Inc. It integrates a voltage output amplifier and an internal buried Zener reference on a single monolithic chip. The device operates with supply voltages ranging from +10.8 V to +16.5 V for both analog and digital sections. Key electrical specifications include a settling time of 7 µs maximum, ±1 LSB differential nonlinearity, and ±3/4 LSB relative accuracy at 25°C. It features a parallel data interface and consumes typically 9 mA of supply current.

Feature Summary

• 12-bit resolution with R-2R architecture and integrated buffered voltage output
• Internal 5 V buried Zener diode reference requiring no external trimming
• Parallel loading structure with double-buffered interface logic for microprocessor compatibility
• Extended temperature range operation from -40°C to +85°C

Applications

• Industrial process control systems requiring precise analog signal generation
• Programmable power supplies and instrumentation amplifiers
• Waveform generation in test and measurement equipment
• Closed-loop servo control applications

Procurement Notes

Verify that the ordering suffix JPZ corresponds to the specific package variant required, as the datasheet lists multiple package options including SOIC and PLCC. Confirm availability status directly with authorized distributors, as stock levels fluctuate. Ensure compliance with RoHS directives if applicable to the target assembly environment. Check for any specific handling requirements related to electrostatic discharge sensitivity during storage and installation.

Selection Notes

Select this component when a single-chip solution with integrated reference and amplifier is needed to save board space. Choose the AD7245A over the AD7248A if direct 12-bit parallel interfacing is preferred over the 8-bit dual-write sequence. Consider the 7 µs settling time for bandwidth requirements. Verify that the supply voltage range of 10.8 V to 16.5 V aligns with the system power rails. Evaluate the ±1 LSB DNL specification against linearity requirements for the specific application.

Part Context

The AD7245A is part of the enhanced DACPORT family, improving upon the original industry-standard AD7245. It offers faster interface times, improved linearity grades, and extended temperature ranges compared to its predecessors. The device is fabricated using linear compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic for high reliability and performance in mixed-signal environments.

Replacement Considerations

The AD7248A is a pin-compatible alternative within the same family but utilizes an 8-bit wide data bus with a two-step write cycle instead of a direct 12-bit parallel interface. Other members of the AD7245A series, such as AD7245AARZ or AD7245ABRZ, offer different package options like SOIC or varying accuracy grades while maintaining identical electrical functionality.