AD5780BCPZ

Overview

The AD5780BCPZ is a true 18-bit, unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices. It operates from a bipolar supply of up to ±16.5 V and features integrated precision reference buffers. The device guarantees monotonic operation with a maximum differential nonlinearity (DNL) of ±1 LSB and an integral nonlinearity (INL) of ±1 LSB for the B grade. Key performance metrics 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.

Feature Summary

• True 18-bit resolution with ±1 LSB INL accuracy
• Low 8 nV/√Hz output noise spectral density
• Integrated precision reference buffers eliminating external components
• Wide power supply range supporting up to ±16.5 V

Applications

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

Procurement Notes

Verify the specific suffix 'BCPZ' against the manufacturer's ordering guide to confirm the package type (LFCSP-24), temperature range (-40°C to +125°C), and quality grade. Ensure compatibility with system requirements for bipolar supplies and serial interface protocols before procurement.

Selection Notes

Select this component for applications requiring high linearity and low noise without external reference buffering. Consider the ±1 LSB INL specification for the B grade variant. Verify that the system can accommodate the required bipolar analog supply voltages and the 3-wire serial communication timing constraints.

Part Context

The AD5780 belongs to the AD5780/AD5790 family of high-precision DACs. It serves as the 18-bit counterpart to the 20-bit AD5790 and complements the 16-bit AD5760. This family is designed for demanding applications where stability and low drift are critical.

Replacement Considerations

Direct functional substitutes within the same family include the AD5781 (18-bit, 0.5 LSB accurate) and the AD5790 (20-bit). For lower resolution needs, the AD5760 (16-bit) may be considered if pin compatibility and interface requirements align.