LTC2754BCUKG-16

Overview

The LTC2754BCUKG-16#PBF is a quad-channel, 16-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features SoftSpan technology, allowing for flexible output range selection without external components. The device operates with a current output type and utilizes a 3-Wire SPI interface for data communication. Key electrical specifications include a settling time of 2 µs, a differential nonlinearity (DNL) of 1 LSB, and an integral nonlinearity (INL) of 2 LSB. It functions within a temperature range of 0°C to +70°C and is housed in a QFN-52 package.

Feature Summary

• SoftSpan Technology: Supports six output ranges including 0–5V, 0–10V, ±5V, ±10V, ±2.5V, and -2.5V to +7.5V via internal configuration.
• High Precision: Delivers 16-bit resolution with 1 LSB DNL and 2 LSB INL accuracy.
• Low Power Consumption: Operates with a working supply current of 500 nA and power dissipation of 1.5 µW.
• Adjustable Transient Response: Includes dedicated offset and gain adjustment pins for optimization.

Applications

• Industrial process control systems requiring multi-channel voltage or current generation.
• Portable instrumentation where low power consumption is critical.
• Medical ultrasound equipment utilizing high-resolution signal generation.
• Software-defined radio architectures needing precise analog waveform synthesis.

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the BC grade corresponds to the commercial temperature range (0°C to +70°C). Ensure the QFN-52 package footprint matches the PCB design constraints. Check for availability status as distribution channels may report stock variations.

Selection Notes

Select this component when four independent 16-bit DAC channels are required in a single package. The SoftSpan feature eliminates the need for external resistors to set output ranges, simplifying the schematic. Compare settling time requirements against the 2 µs specification. Ensure the system can accommodate the external reference requirement, as the device does not contain an internal reference.

Part Context

This part belongs to the LTC2754 family of SoftSpan Iout DACs. It shares architectural similarities with the LTC2704 series but differs in output type (current vs. voltage) and pin count. The UKG package denotes a specific QFN variant used across multiple Analog Devices precision converters. Development is supported by the DC1546A demonstration circuit.

Replacement Considerations

Direct substitutes within the same family include other resolution variants such as the LTC2754-14 or LTC2754-12, provided pin compatibility is maintained. Cross-family replacements like the LTC2704 require voltage output interfaces rather than current outputs. Verify that any alternative maintains the 16-bit linearity specifications and QFN-52 form factor.