LTC2654BCUF-H16#PBF

Overview

The LTC2654BCUF-H16#PBF 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 voltage of 4.096V. The device operates on a single supply voltage ranging from 4.5V 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 at 16 bits, a low offset error of ±2mV maximum, and guaranteed monotonicity over the operating temperature range of 0°C to 70°C.

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 equipment
• Automatic test equipment
• Automotive applications

Procurement Notes

Verify the component matches the specific -H suffix for 4.5V–5.5V operation and 4.096V full-scale output. Confirm the BC grade indicates ±4LSB maximum INL performance. Ensure the UF package designation corresponds to the 20-lead QFN form factor required for the design. Check that the #PBF suffix confirms lead-free construction compliant with RoHS standards.

Selection Notes

Select this part when a quad-channel DAC with high accuracy and low crosstalk is required in a compact footprint. The -H variant is necessary if the system requires a 4.096V full-scale range; otherwise, the -L variant supports 2.7V–5.5V supplies with a 2.5V range. Consider the external reference option if a different full-scale voltage is needed, as the DAC supports inputs up to VCC/2. Verify thermal management requirements for the QFN package given the junction temperature limits.

Part Context

This component belongs to the LTC2654 family of quad DACs, which also includes 12-bit variants and packages such as the 16-lead narrow SSOP. The BCUF-H16 designation specifically identifies the B-grade accuracy, QFN package, commercial temperature range, and 16-bit resolution with the higher voltage internal reference configuration.

Replacement Considerations

Direct replacements within the same family include LTC2654BIUF-H16#PBF for industrial temperature range (-40°C to 85°C) or LTC2654BCGN-H16#PBF for the SSOP package. Cross-family alternatives like the LTC2641 offer single-channel solutions but lack the quad integration.