LTC2657BIUFD-L16#TRPBF

Overview

The LTC2657BIUFD-L16#TRPBF is an octal, 16-bit digital-to-analog converter featuring a 2-wire I²C serial interface. It integrates a precision reference with a maximum temperature coefficient of 10ppm/°C, yielding a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and includes built-in rail-to-rail output buffers. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4LSB, a settling time of 9.1µs for 16-bit accuracy, and a typical supply current of 3.1mA. It supports standard (100kHz) and fast mode (400kHz) clock rates.

Feature Summary

• Octal architecture with 8 independent 16-bit DAC channels in a compact package
• Integrated 1.25V reference with 10ppm/°C max temperature coefficient
• Rail-to-rail buffered voltage outputs with ultralow crosstalk (0.8nV•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 '#TRPBF' confirms tape and reel packaging and lead-free construction. Confirm the 'I' grade designation matches the required operating temperature range of –40°C to +85°C. Ensure the 'B' electrical grade meets the ±4LSB maximum INL requirement for the target application.

Selection Notes

Select this part when eight isolated analog outputs are required within a limited board area. The L-option provides a 2.5V full-scale range suitable for 2.7V to 5.5V supplies. For higher voltage swings, consider the H-option which requires a 4.5V to 5.5V supply and offers a 4.096V full-scale output. External references can be used if lower noise or different voltage levels are needed.

Part Context

This component belongs to the LTC2657 family of octal DACs. The BIUFD variant specifically denotes the Industrial temperature grade (-40°C to 85°C), B-grade linearity (±4LSB INL), QFN-20 package, and 16-bit resolution. It serves as a high-channel-count alternative to single or quad DACs in dense multi-channel designs.

Replacement Considerations

Public confirmed substitute part numbers: LTC2657BCUFD-L16#TRPBF (Commercial grade, same specs, 0°C to 70°C). Note that package and pinout remain identical between C and I grades.