AD7248ABRZ

Overview

The AD7248ABRZ is a 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices, part of the DACPORT family. It integrates an output amplifier and a buried Zener voltage reference on a monolithic CMOS chip. The device features an 8-bit-wide data bus with a double-buffered interface logic structure, loading data in two write operations via CSMSB and CSLSB signals. It operates on single or dual supplies ranging from ±10.8 V to ±16.5 V. Key performance metrics include a settling time of 7 µs max, relative accuracy of ±1/2 LSB for the B grade, and low power consumption of 65 mW typical in single supply mode.

Feature Summary

• 12-bit resolution with ±1/2 LSB relative accuracy (Grade B)
• Integrated 5 V buried Zener reference and buffered output amplifier
• Double-buffered parallel interface with 8-bit data bus and separate MSB/LSB control
• Single or dual supply operation (±10.8 V to ±16.5 V)

Applications

• Microprocessor-controlled analog signal generation
• Industrial process control systems requiring precise voltage outputs
• Test and measurement equipment needing stable DAC references

Procurement Notes

Verify the package option 'R' corresponds to the SOIC-20 configuration as specified in the ordering guide. Confirm the temperature range matches the commercial grade (-40°C to +85°C). Ensure supply voltages are within the ±10.8 V to ±16.5 V limits for specified performance. Check RoHS compliance status if required by local regulations.

Selection Notes

Select the AD7248ABRZ when an 8-bit microprocessor interface is preferred over a full 12-bit parallel bus. Choose this model over the AD7245A if double buffering of the lower byte is required for specific timing constraints. Ensure the application can accommodate the SOIC-20 package dimensions and thermal requirements. Verify that the required output voltage ranges (0-5V, 0-10V, or ±5V) align with the external resistor connections available on the ROFS and RFB pins.

Part Context

The AD7248ABRZ is an enhanced version of the industry-standard AD7248, offering improved linearity grades and faster interface times. It belongs to the DACPORT series, which combines precision bipolar circuits with low-power CMOS logic. The 'ABRZ' suffix indicates the B-grade accuracy, SOIC package, and lead-free/RoHS compliant construction.

Replacement Considerations

The AD7248ABR is the non-RoHS equivalent with identical electrical specifications but in the same SOIC package. For DIP packages, the AD7248ABNZ is the direct alternative. No other pin-compatible replacements are documented in the provided datasheet.