LTC2668HUJ-16#TRPBF

Overview

The LTC2668HUJ-16#TRPBF is a 16-channel, 16-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features SoftSpan technology allowing each channel to be independently programmed for five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, or ±10V. The device includes an integrated precision reference with a maximum drift of 10ppm/°C and supports external references. Key electrical parameters include a settling time of 20.5µs for the ±10V range, a differential nonlinearity (DNL) of ±0.2 LSB, and an integral nonlinearity (INL) of ±2.2 LSB. It operates on analog supplies of ±4.5V to ±15.75V and a digital supply of 1.71V to 5.5V.

Feature Summary

• 16 independent channels with 16-bit resolution and SoftSpan programmable output ranges up to ±10V
• Integrated precision 2.5V reference with 10ppm/°C max temperature coefficient
• 3-wire SPI/Microwire compatible serial interface operating at clock rates up to 50MHz
• A/B toggle capability via dedicated pin or software command for dual buffer updates

Applications

• Optical networking equipment
• Instrumentation systems
• Data acquisition platforms
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify that the #TRPBF suffix confirms the tape and reel packaging format containing 2000 pieces per reel. Ensure the HUJ designation matches the required automotive temperature grade (-40°C to +125°C) and the 40-lead QFN package type for your specific manufacturing process.

Selection Notes

Select this part when high channel density and wide dynamic range are required in a compact footprint. The H-grade variant is necessary for applications exceeding standard industrial temperatures. Consider the internal reference's 10ppm/°C drift; if tighter gain stability is needed under thermal load, utilize the REF pin with an external low-drift reference source.

Part Context

This component belongs to the LTC2668 family, which also offers 12-bit resolution variants (LTC2668-12). The HUJ-16#TRPBF specifically denotes the highest performance grade within the 16-bit subset, packaged in a 6mm × 6mm QFN form factor designed for space-constrained PCB layouts.

Replacement Considerations

Direct functional replacements within the same series include the LTC2668IUJ-16#TRPBF for industrial temperature ranges (-40°C to 85°C) or the LTC2668CUJ-16#TRPBF for commercial ranges (0°C to 70°C). Verify that the lower temperature grades meet the environmental requirements of the target application.