LTC2657BIFE-L16#PBF

Overview

The LTC2657BIFE-L16#PBF is an octal, 16-bit digital-to-analog converter (DAC) featuring a 2-wire I²C compatible serial interface. It integrates a precision reference with a maximum temperature coefficient of 10ppm/°C, establishing a full-scale output voltage of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and includes high-performance rail-to-rail output buffers that are guaranteed monotonic over the operating temperature range. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4 LSB, a settling time of 9.1µs for 16-bit accuracy, and ultralow DAC-to-DAC crosstalk of 0.8nV•s. The component is housed in a 20-lead thermally enhanced TSSOP package.

Feature Summary

• Octal architecture with eight independent 16-bit channels
• Integrated 1.25V reference yielding 2.5V full-scale output
• I²C interface supporting standard (100kHz) and fast (400kHz) modes
• Rail-to-rail output buffers with ±4 LSB maximum INL

Applications

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

Procurement Notes

Verify the specific ordering suffix 'B' confirms the ±4 LSB INL grade and 'L' confirms the 2.5V internal reference configuration. Confirm the 'FE' suffix corresponds to the 20-lead Thermally Enhanced TSSOP package. Ensure the '#PBF' designation matches lead-free requirements. Cross-reference the manufacturer's official documentation for any updates regarding RoHS compliance or material declarations prior to final procurement.

Selection Notes

Select this part when an octal DAC configuration is required with a 2.5V full-scale range. The -L option restricts the valid supply voltage range to 2.7V–5.5V, whereas the -H option requires 4.5V–5.5V. The B-grade provides ±4 LSB INL; lower accuracy grades (C-grade, ±1 LSB) are available if performance requirements allow. Consider the external reference mode capability, which allows the full-scale output to be set to twice the external reference voltage if higher dynamic ranges are needed.

Part Context

This component belongs to the LTC2657 family of octal DACs. Variants within the family differ by resolution (12-bit vs. 16-bit), accuracy grade (B-grade vs. C-grade), full-scale voltage setting (-L for 2.5V vs. -H for 4.096V), and package type (TSSOP vs. QFN). The BIFE-L16 designation specifically identifies the Industrial temperature grade, B-grade accuracy, FE package, L-option reference, and 16-bit resolution.

Replacement Considerations

Direct pin-compatible replacements within the same package and interface include other members of the LTC2657 family, such as the LTC2657BCFE-L16#PBF (Commercial grade) or LTC2657BIUFD-L16#PBF (QFN package). Substituting with H-option variants (e.g., LTC2657BIFE-H16#PBF) requires verifying the supply voltage meets the 4.5V minimum requirement.