AD7244JNZ

Overview

The AD7244JNZ is a dual, complete, 14-bit voltage output digital-to-analog converter (DAC) fabricated in Linear Compatible CMOS (LC2MOS). It integrates two 14-bit DACs, on-chip 3 V buried Zener reference, and high-speed serial interface logic. The device operates from ±5 V supplies, providing a bipolar analog output range of ±3 V. Key electrical specifications include a settling time of 4 μs to within ±1/2 LSB, integral nonlinearity of ±2 LSB max, and differential nonlinearity of ±1 LSB max. It features independent asynchronous control for each channel via separate LDAC inputs.

Feature Summary

• Dual 14-bit resolution with integrated output buffer amplifiers
• On-chip 3 V temperature-compensated buried Zener reference
• High-speed serial interface compatible with DSP processors and microcontrollers
• Independent asynchronous update control for both channels

Applications

• Industrial process control systems requiring precise voltage generation
• Portable instrumentation utilizing low power consumption
• Test and measurement equipment needing fast settling times
• Audio synthesis and waveform generation applications

Procurement Notes

Verify the specific suffix 'JN' corresponds to the Plastic DIP-24 package and the -40°C to +85°C operating temperature range as defined in the ordering guide. Confirm that the J version meets the ±2 LSB max integral nonlinearity specification. Ensure supply voltages are strictly maintained at ±5 V ±5% to guarantee specified performance parameters.

Selection Notes

Select the AD7244JNZ when 14-bit resolution is required over the 12-bit AD7242 variant. This component is suitable for designs needing a compact 24-pin DIP footprint with integrated reference and buffering. Consider the 4 μs settling time and 130 mW typical power dissipation for system-level timing and thermal budget calculations. Verify compatibility with the host microcontroller's serial protocol timing constraints.

Part Context

The AD7244 shares the same pinout and architecture as the AD7242, allowing for easy upgrade from 12-bit to 14-bit performance without PCB redesign. Both devices utilize the LC2MOS process, combining precision bipolar circuits with low-power CMOS logic. The JN suffix denotes the plastic dual-in-line package option available for this series.

Replacement Considerations

The AD7242 serves as a lower-resolution alternative within the same family. For military specifications, the AD7244SQ processed to MIL-STD-883 Class B is available. No direct cross-manufacturer equivalents are documented in the provided datasheet.