AD7248AAP

Overview

The AD7248AAP is a monolithic 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 single CMOS chip. The device features a parallel loading structure with an 8-bit-wide data bus, utilizing CSMSB, CSLSB, and WR signals for data entry. It operates from +12 V to +15 V supplies and supports unipolar (0 V to 5 V, 0 V to 10 V) or bipolar (±5 V) output ranges. The AD7248AAP offers ±1/2 LSB linearity, 30 ns typical data setup time, and low power consumption of 65 mW in single-supply mode.

Feature Summary

• 12-bit resolution with ±1/2 LSB relative accuracy grade
• Integrated 5 V buried Zener reference and buffered output amplifier
• 8-bit parallel interface with double-buffered input latch logic
• Extended temperature range operation from –40°C to +85°C

Applications

• Microprocessor-controlled analog signal generation
• Precision instrumentation requiring integrated reference solutions
• Industrial process control systems
• Data acquisition systems with single-chip DAC requirements

Procurement Notes

Verify the package option P-20A corresponds to the Plastic Leaded Chip Carrier configuration when ordering. Confirm that the A suffix denotes the commercial temperature range of –40°C to +85°C. Ensure supply voltages are maintained within the +12 V to +15 V window for specified performance. Check for MIL-STD-883 Class B processing availability if military specifications are required by adding /883B to the part number.

Selection Notes

Select the AD7248AAP over the AD7245A variant when interfacing with microprocessors featuring an 8-bit wide data bus, as it utilizes an 8+4 bit loading structure. Choose this model for applications requiring the specific P-20A plastic leaded chip carrier package. Consider the AD7248ABP if higher linearity accuracy is needed, or the AD7248ATQ for extended industrial temperature ranges up to +125°C.

Part Context

The AD7248AAP belongs to the enhanced AD7245A/AD7248A series, which improves upon the original industry-standard AD7245/AD7248 devices. Key enhancements include operation from 12 V to 15 V supplies, improved linearity grades, faster interface times, and better full-scale variation with VDD. This series represents a complete single-chip solution combining LC2MOS technology with precision bipolar circuits and low-power CMOS logic.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.