LTC2654BCUF-L16#PBF

Overview

The LTC2654BCUF-L16#PBF is a quad 16-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a maximum temperature coefficient of 10ppm/°C and built-in high-performance output buffers guaranteed monotonic over temperature. The device operates on a single 2.7V to 5.5V supply, providing a full-scale output of 2.5V with the internal reference. Communication is handled via a 4-wire SPI/Microwire compatible serial interface supporting clock rates up to 50MHz. It includes a power-on reset circuit configurable for zero-scale or mid-scale initialization.

Feature Summary

• Quad 16-bit resolution with ±4LSB maximum INL error
• Integrated 10ppm/°C max precision reference with selectable internal or external mode
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• Configurable power-on reset to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the specific ordering suffix UF indicates the 20-lead 4mm × 4mm plastic QFN package. Confirm the B grade specifies a maximum Integral Nonlinearity (INL) of ±4 LSB. Ensure the L suffix corresponds to the 2.5V full-scale output range requiring a 2.7V to 5.5V supply voltage. Check RoHS compliance status as indicated by the #PBF designation.

Selection Notes

Select this component when four independent 16-bit voltage outputs are required in a compact footprint. The -L variant is suitable for single-supply designs operating between 2.7V and 5.5V. Consider the external reference option if a full-scale output greater than 2.5V is needed, as the external reference doubles the output span. Verify that the 50MHz serial interface speed meets system timing requirements.

Part Context

This part belongs to the LTC2654 family, which also includes 12-bit variants and -H options with a 4.096V full-scale output. The BCUF designation identifies the commercial temperature grade (0°C to 70°C), B accuracy grade, and QFN package. Other packages include the 16-lead narrow SSOP (GN).

Replacement Considerations

Direct replacements within the same package and electrical specifications include other LTC2654 variants such as the LTC2654BIUF-L16#PBF for industrial temperature range (-40°C to 85°C). Cross-family alternatives like the LTC2655 or LTC2656 offer similar functionality but may differ in channel count, interface type (I2C vs SPI), or package dimensions.