AD5780ACPZ-REEL7

Overview

The AD5780ACPZ-REEL7 is a true 18-bit, unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices. It features ±1 LSB integral nonlinearity (INL) and operates with bipolar supplies up to ±16.5 V. The device includes integrated precision reference buffers, eliminating the need for external buffering. Key electrical specifications include an 8 nV/√Hz output noise spectral density, a 2.5 µs settling time, and a gain error temperature coefficient of ±0.018 ppm/°C. It utilizes a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards, supporting clock rates up to 35 MHz.

Feature Summary

• True 18-bit resolution with ±1 LSB maximum INL accuracy
• Ultra-low 8 nV/√Hz output noise spectral density
• Integrated precision reference buffers for simplified design
• Wide supply range supporting up to ±16.5 V operation

Applications

• Medical instrumentation
• Test and measurement equipment
• Industrial control systems
• Scientific and aerospace instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific grade (A or B) associated with the ACPZ suffix against the manufacturer's ordering guide, as performance parameters like INL vary by grade. Confirm that the REEL7 suffix corresponds to the required tape and reel quantity for production integration. Ensure compatibility with the target PCB footprint for the 24-pin LFCSP package.

Selection Notes

Select this component when high linearity and low noise are critical requirements. The integrated reference buffers reduce board space compared to discrete solutions. Verify that the application can accommodate the required bipolar power supply rails. Consider the 35 MHz interface speed if high throughput is necessary. Check thermal management needs given the LFCSP package dimensions.

Part Context

The AD5780 belongs to the AD5780 family of high-precision DACs. It is often paired with companion products such as the AD8675 output amplifier buffer or external references like the ADR445. Evaluation boards such as the EVAL-AD5780SDZ are available for development purposes. Related devices in the portfolio include the 20-bit AD5790 and the 18-bit AD5781.

Replacement Considerations

The AD5781 is a related 18-bit device offering 0.5 LSB accuracy. For higher resolution requirements, the 20-bit AD5790 or AD5791 may be considered. Lower resolution alternatives include the 16-bit AD5760 or AD5541A. Verify pinout and register compatibility before substituting.