AD7248ABR-REEL

Overview

The AD7248ABR-REEL is a 12-bit CMOS digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices. It integrates an output amplifier and a buried Zener voltage reference on a monolithic chip. The device features an 8-bit-wide data bus with a double-buffered interface logic structure, requiring two write operations to load 12-bit data. It operates on single or dual supplies ranging from 10.8 V to 16.5 V. Key performance metrics include a typical settling time of 7 µs, ±1/2 LSB relative accuracy for the B grade, and low power consumption of 65 mW in single-supply mode. The part is housed in a 20-lead SOIC package.

Feature Summary

• Integrated 12-bit DAC with output amplifier and internal 5 V reference
• Double-buffered parallel interface with 8-bit data bus loading structure
• ±1/2 LSB relative accuracy (B Grade) and guaranteed monotonicity
• Wide supply range: 10.8 V to 16.5 V for both analog and digital sections

Applications

• Microprocessor-controlled data acquisition systems
• Programmable gain amplifiers and variable voltage sources
• Industrial process control instrumentation
• Waveform generation and signal processing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. The 'BR' suffix indicates a 20-lead SOIC package, while 'REEL' denotes tape-and-reel packaging. Confirm RoHS compliance status and any military processing requirements if applicable, as these details are subject to change without notice.

Selection Notes

Select the AD7248ABR-REEL when an 8-bit microprocessor interface is required, as it simplifies wiring compared to the 12-bit wide AD7245A variant. Ensure the system supports the required 10.8 V to 16.5 V supply rails. For applications needing a CLR pin for power-on reset, consider the AD7245A instead, as the AD7248A lacks this specific control input.

Part Context

This component belongs to the enhanced AD7245A/AD7248A series, which improves upon the industry-standard AD7245/AD7248. Enhancements include operation from 12 V to 15 V supplies, faster interface times with 30 ns typical data setup time, and extended commercial/industrial temperature ranges. The AD7248A specifically targets systems using 8-bit data buses.

Replacement Considerations

The AD7245ABR-REEL is a functional substitute within the same family but requires a 12-bit parallel interface rather than an 8-bit one. Other AD7248 variants such as AD7248ANZ or AD7248JNZ offer different packages or temperature grades but maintain the same core functionality.