AD7248JPZ

Overview

The AD7248JPZ is a 12-bit DACPORT digital-to-analog converter manufactured by Analog Devices Inc. It integrates a voltage output amplifier and an internal Zener reference on a monolithic CMOS chip, eliminating the need for external user trims. The device features an 8-bit-wide data bus with an (8+4) parallel loading structure, allowing data to be loaded into the input latch in two write operations. It operates from single or dual supplies ranging from ±10.8 V to ±16.5 V. Key performance metrics include a settling time of 7 µs to within ±1/2 LSB, a relative accuracy of ±1/2 LSB max at 25°C, and a differential nonlinearity of ±1 LSB max. The part is housed in a 20-lead Plastic DIP package.

Feature Summary

• 12-bit resolution with ±1/2 LSB relative accuracy grade
• (8+4) parallel loading structure for microprocessor compatibility
• Integrated low-noise buried Zener voltage reference
• Voltage buffered output capable of 10 V across a 2 kΩ load

Applications

• Industrial process control systems requiring precise analog signal generation
• Data acquisition systems utilizing high-speed parallel interfaces
• Test and measurement equipment needing stable voltage references

Procurement Notes

Verify the specific suffix JPZ against the official Analog Devices ordering guide to confirm the package type (Plastic Leaded Chip Carrier or similar variant depending on exact revision) and temperature range. Ensure supply voltages are maintained within the specified ±10.8 V to ±16.5 V range for guaranteed performance. Check for RoHS compliance status as indicated in current product documentation.

Selection Notes

Select the AD7248JPZ when an 8-bit microprocessor interface is required, as opposed to the 12-bit direct interface of the AD7245A. Consider the ±1/2 LSB accuracy grade for applications demanding higher linearity than the standard ±3/4 LSB version. Ensure the system can accommodate the required power supply rails and that the 20-pin package footprint fits the PCB layout constraints.

Part Context

The AD7248A is an enhanced version of the industry-standard AD7248, featuring improved operation from 12 V to 15 V supplies, faster interface times with a typical 30 ns data setup time, and extended temperature ranges. It belongs to the DACPORT family, which combines precision bipolar circuits with low-power CMOS logic in an LC2MOS process.

Replacement Considerations

The AD7248ABNZ is a verified alternative within the same family offering identical electrical specifications but in a PDIP-20 package. The AD7248JNZ provides the same functionality in a different plastic DIP variant. Verify pinout compatibility and package dimensions before substitution.