LTC2664HUH-12#PBF

Overview

The LTC2664HUH-12#PBF is a quad-channel, 12-bit digital-to-analog converter featuring SoftSpan technology for independently programmable output ranges up to ±10V. It integrates a precision reference with a maximum temperature coefficient of 10ppm/°C and built-in rail-to-rail output buffers capable of driving ±10mA. The device operates on analog supplies from ±4.5V to ±15.75V (or single supply) and supports a 3-wire SPI/Microwire interface at clock rates up to 50MHz. Key electrical specifications include a typical settling time of 9µs for a 10V step, an integral nonlinearity (INL) of ±1 LSB, and differential nonlinearity (DNL) of ±0.5 LSB. It is housed in a 32-lead QFN package.

Feature Summary

• Quad-channel 12-bit DAC with independently programmable SoftSpan output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V
• Integrated precision voltage reference with a maximum temperature coefficient of 10ppm/°C
• Bipolar supply operation from ±4.5V to ±15.75V or single-supply compatible via V– tied to GND
• A/B toggle capability via dedicated TGP pin or software command for dual-register updates

Applications

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

Procurement Notes

Verify the H suffix indicates the automotive temperature grade (-40°C to 125°C). Confirm the UH package designation corresponds to the 32-lead (5mm × 5mm) QFN form factor. Ensure the #PBF suffix denotes lead-free compliance. Cross-reference the specific part number against official Analog Devices documentation to confirm availability and manufacturing status.

Selection Notes

Select this component when four independent channels with high-voltage output swings are required. The 12-bit resolution and SoftSpan feature allow flexible range configuration without external scaling components. Consider the -40°C to 125°C operating range if deployed in harsh environments. Verify that the 50MHz SPI speed and 1.71V logic compatibility meet system interface requirements.

Part Context

This part belongs to the LTC2664 family of SoftSpan DACs. The HUH-12 variant specifically denotes the 12-bit resolution version within the automotive-grade (H) temperature range, packaged in the 32-lead QFN (UH) format. It shares architectural similarities with the 16-bit variants but offers optimized linearity and power characteristics for 12-bit applications.

Replacement Considerations

The LTC2664IUH-12#PBF serves as a functional substitute with identical electrical specifications, differing only in the industrial temperature range (-40°C to 85°C) compared to the automotive grade (-40°C to 125°C).