LTC2664IUH-12#PBF

Overview

The LTC2664IUH-12#PBF is a quad-channel, 12-bit digital-to-analog converter (DAC) featuring SoftSpan technology for independently programmable output ranges up to ±10V. It integrates a precision 2.5V 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 ranging from ±4.5V to ±15.75V and a digital supply from 1.71V to VCC+0.3V. Key electrical specifications include a typical settling time of 9µs for a ±5V step, an integral nonlinearity (INL) of ±0.2 LSB, and a differential nonlinearity (DNL) of ±0.05 LSB. It utilizes a 3-wire SPI/Microwire-compatible serial interface.

Feature Summary

• Quad-channel architecture with independent SoftSpan™ range programming: 0V to 5V, 0V to 10V, ±2.5V, ±5V, or ±10V.
• Integrated precision 2.5V reference with 10ppm/°C maximum temperature coefficient; supports external reference input.
• Rail-to-rail output buffers guarantee monotonicity and drive currents up to ±10mA.
• A/B toggle capability via dedicated TGP pin or software command for rapid data updates.

Applications

• Optical networking systems
• Precision instrumentation
• Data acquisition systems
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify the suffix #PBF indicates a lead-free finish. Confirm the 'I' grade designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 'UH' package code matches the required 32-lead (5mm × 5mm) QFN footprint. Cross-reference the specific part number against the manufacturer's current product selector guide to confirm availability status.

Selection Notes

Select this model for applications requiring four independent channels with flexible voltage spans without external scaling components. The 12-bit resolution is suitable where ±0.2 LSB INL is sufficient. Consider the LTC2664-16 variant if higher linearity accuracy (±4 LSB max INL) and 16-bit resolution are required. Ensure supply voltages accommodate the selected output range, noting that V– can be tied to ground for single-supply operation.

Part Context

This component belongs to the LTC2664 family of SoftSpan DACs. The IUH-12#PBF specifically denotes the Industrial temperature grade (-40°C to 85°C), 12-bit resolution, 32-lead QFN package, and lead-free construction. It shares the same block diagram and interface as the 16-bit variants but offers different linearity specifications and resolution limits.

Replacement Considerations

The LTC2664IUH-16#PBF is a pin-compatible alternative offering 16-bit resolution. Other members of the LTC2664 family share the same package and interface but vary in temperature grade (C for Commercial, H for Automotive) or resolution.