LTC2666HUH-16#TRPBF

Overview

The LTC2666HUH-16#TRPBF is an octal, 16-bit digital-to-analog converter (DAC) featuring SoftSpan technology and a precision integrated reference. It provides eight independent voltage outputs with ranges up to ±10V, including 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. The device guarantees monotonicity over temperature and includes rail-to-rail output buffers capable of driving ±10mA. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4 LSB at 16 bits, a settling time of 20 µs for a ±20V step, and a reference temperature coefficient of 10 ppm/°C. It operates on analog supplies from ±4.5V to ±15.75V and digital logic from 1.71V to 5.5V.

Feature Summary

• Octal 16-Bit Resolution: Eight independent channels with full 16-bit resolution across all selectable output ranges.
• SoftSpan Technology: Independently programmable output ranges (0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V) per channel.
• Integrated Precision Reference: Built-in 2.5V reference with a maximum temperature coefficient of 10 ppm/°C.
• A/B Toggle Capability: Supports hardware or software switching between two sets of DAC registers for each channel.

Applications

• Optical Networking
• Instrumentation
• Data Acquisition Systems
• Automatic Test Equipment
• Process Control and Industrial Automation

Procurement Notes

Verify the #TRPBF suffix indicates a tape and reel packaging format containing 2500 pieces. Confirm the H suffix corresponds to the automotive temperature grade (-40°C to +125°C). Ensure compatibility with the 32-lead QFN package dimensions during PCB layout. Check for RoHS compliance documentation as specified by Analog Devices.

Selection Notes

Select this part for applications requiring multiple high-precision voltage outputs with flexible range configurations. The 16-bit resolution and ±4 LSB INL make it suitable for high-fidelity signal generation. Consider the 20 µs settling time for speed requirements. The exposed pad must be soldered to the PCB for thermal management and electrical connection to V–.

Part Context

This component belongs to the LTC2666 family of SoftSpan DACs. The HU designation specifies the 32-lead (5mm × 5mm) QFN package. The H suffix denotes the extended temperature range (-40°C to +125°C), distinguishing it from Commercial (C) and Industrial (I) grades. The 16 in the model number confirms 16-bit resolution, differentiating it from the 12-bit variants.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2666HUH-16#PBF (tube packaging) and LTC2666IUH-16#TRPBF (industrial temperature grade). Verify that the alternative part meets the required -40°C to +125°C operating range if the H grade is critical for the application.