AD5778RBCPZ

Overview

The AD5778RBCPZ is a dual-channel, 16-bit current source digital-to-analog converter (DAC) from Analog Devices. It provides two high-compliance outputs with a guaranteed 1 V dropout at 200 mA and supports load voltages up to 32 V. Each channel features eight programmable current ranges, scaling from 3.125 mA to 300 mA full-scale output. The device integrates a precision 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C and accepts external references between 1.225 V and 1.275 V. Communication is handled via an SPI/Microwire-compatible 3-wire serial interface operating at clock rates up to 50 MHz. Packaged in a 32-lead QFN.

Feature Summary

• Dual-channel 16-bit resolution with per-channel programmable output ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
• High compliance voltage supporting load voltages up to 32 V with separate supply pins for each channel
• Integrated precision 1.25 V internal reference or external reference input option
• Internal switches allow sinking up to 80 mA to an optional negative supply

Applications

• Tunable lasers
• Semiconductor optical amplifiers
• Resistive heaters
• Current-mode biasing
• Proportional solenoid drive

Procurement Notes

Verify the specific package suffix against the manufacturer's ordering guide to ensure compatibility with the required footprint. Confirm that the revision level matches the design requirements, as specifications are subject to change without notice. Cross-reference the datasheet version date to ensure all electrical parameters align with the intended application environment.

Selection Notes

Select this component when high-voltage compliance and precise current control are required. Ensure the system power supplies can accommodate the 2.85 V to 33 V range for the output channels. Verify that the digital logic levels support the 1.71 V to 5 V IOVCC requirement. Consider the thermal dissipation characteristics if operating near the maximum current ranges.

Part Context

This part belongs to the AD5778R family of softspan DACs designed for industrial and instrumentation applications. It is distinct from voltage-output DACs and offers higher current capabilities compared to standard nanoDACs. The device is suitable for designs requiring flexible current sourcing with integrated monitoring and fault detection capabilities.

Replacement Considerations

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