LTC2657BIUFD-L16#PBF

Overview

The LTC2657BIUFD-L16#PBF is an octal 16-bit digital-to-analog converter featuring integrated rail-to-rail output buffers and a precision internal reference. It operates on a single 2.7V to 5.5V supply with a maximum integral nonlinearity of ±4 LSB. The device utilizes a 2-wire I²C serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical parameters include a settling time of 9.1µs, a supply current of 3.1mA, and a power dissipation of 9mW. It is housed in a 20-lead 4mm × 5mm QFN package and functions within an industrial temperature range of –40°C to +85°C.

Feature Summary

• Octal architecture with eight independent 16-bit voltage output DACs
• Integrated 1.25V reference yielding a 2.5V full-scale output span
• Guaranteed monotonic operation over the full operating temperature range
• Power-on reset circuit configurable for zero-scale or mid-scale initialization

Applications

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

Procurement Notes

Verify the component matches the specific L-option configuration for a 2.7V minimum supply voltage. Confirm the UFD package designation corresponds to the 20-lead QFN form factor. Ensure the B-grade specification aligns with the required ±4 LSB maximum INL performance criteria for the target design.

Selection Notes

Select this part when multiple isolated analog outputs are required from a single controller via I²C. The L-option variant is suitable for designs requiring a 2.7V system supply, whereas H-options require 4.5V. Consider the external reference mode if a full-scale output exceeding 2.5V is necessary by doubling the external reference voltage.

Part Context

This component belongs to the LTC2657 family of octal DACs. The 'B' suffix indicates a maximum INL of ±4 LSB, while 'L' specifies the 2.5V full-scale range derived from the internal 1.25V reference. The 'UFD' code identifies the 20-lead plastic QFN package, and '#PBF' denotes lead-free construction compliant with RoHS standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.