LTC2654BCUF-L16#TRPBF

Overview

The LTC2654BCUF-L16#TRPBF is a quad 16-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead 4mm × 4mm plastic QFN package. It features an integrated precision reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and communicates via a 4-wire SPI/Microwire compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4LSB, a settling time of 8.9µs for 16-bit accuracy, and guaranteed monotonicity over the operating temperature range.

Feature Summary

• Quad 16-bit resolution with integrated 10ppm/°C max precision reference
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• SPI/Microwire compatible 4-wire serial interface supporting 50MHz clocks
• Selectable power-on reset to zero-scale or mid-scale via PORSEL pin

Applications

• Mobile communications systems
• Process control and industrial automation
• Instrumentation and measurement equipment
• Automatic test equipment (ATE)
• Automotive electronic systems

Procurement Notes

Verify that the component matches the specified 20-lead QFN package and the 'B' electrical grade indicating ±4LSB maximum INL. Confirm the 'L' suffix corresponds to the 2.5V full-scale internal reference configuration. Ensure the '#TRPBF' designation indicates lead-free tape and reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this part when four independent 16-bit voltage outputs are required within a compact footprint. The -L variant is appropriate for single-supply applications operating between 2.7V and 5.5V where a 2.5V full-scale range is sufficient. Consider the external reference mode if a different full-scale voltage is needed, as the output span becomes twice the external reference voltage.

Part Context

This component belongs to the LTC2654 family, which also includes 12-bit variants and parts with higher full-scale voltages (-H series). The BCUF designation specifies the commercial temperature grade (0°C to 70°C), the B electrical grade for linearity, and the UF QFN package. Other package options include the 16-lead narrow SSOP (GN package).

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2654BIUF-L16#TRPBF for industrial temperature ranges (-40°C to 85°C) or LTC2654CUF-L16#TRPBF for standard ±1LSB INL performance. Verify that any substitute maintains the required 16-bit resolution and 2.5V full-scale output characteristics.