LTC2654IUF-L12#PBF

Overview

The LTC2654IUF-L12#PBF is a quad 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and communicates via a 4-wire SPI/Microwire compatible serial interface with clock rates up to 50MHz. It includes built-in high-performance output buffers and is guaranteed monotonic over the industrial temperature range of –40°C to 85°C. The component is housed in a 20-lead 4mm × 4mm plastic QFN package.

Feature Summary

• Quad 12-bit resolution with integrated 10ppm/°C max reference
• Rail-to-rail output with ±1 LSB INL and ±0.5 LSB DNL
• SPI/Microwire compatible 4-wire serial interface
• Selectable internal or external reference modes

Applications

• Mobile communications
• Process control and industrial automation
• Instrumentation
• Automatic test equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix L12 confirms the 12-bit resolution and 2.5V full-scale output configuration. Confirm the I suffix indicates the industrial temperature grade (-40°C to 85°C). Ensure the UF suffix corresponds to the 20-lead QFN package. Check for RoHS compliance status as indicated by the #PBF designation.

Selection Notes

Select this part when four independent 12-bit voltage outputs are required in a compact form factor. The integrated reference simplifies design by eliminating external precision references. Consider the 2.7V to 5.5V supply range for low-power applications. Verify that the 50MHz serial interface speed meets system timing requirements.

Part Context

This component belongs to the LTC2654 family, which offers variations in resolution (12-bit or 16-bit), accuracy grades (B or C), and full-scale voltages (2.5V or 4.096V). The IUF-L12 variant specifically targets industrial environments requiring moderate precision and low power consumption within a small footprint.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2654 variants such as LTC2654CUF-L12#PBF for commercial temperature ranges or LTC2654BIUF-L12#PBF for higher accuracy grades. Cross-family replacements like the LTC2642 require interface and performance validation.