LTC2657CFE-L12#TRPBF

Overview

The LTC2657CFE-L12#TRPBF is an octal, 12-bit digital-to-analog converter (DAC) family member from Analog Devices. It features a 20-lead thermally enhanced TSSOP package and operates within a commercial temperature range of 0°C to 70°C. The device integrates a precision reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. It utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, a settling time of 3.9µs for ±1LSB accuracy at 12-bit resolution, and a supply current of 3.1mA with the internal reference active.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels in a single 20-lead package.
• Integrated 1.25V reference yielding a 2.5V full-scale output with <10ppm/°C drift.
• Rail-to-rail buffered outputs guaranteed monotonic over temperature.
• Configurable power-on reset to zero-scale or mid-scale via the PORSEL pin.

Applications

• Mobile communications systems requiring multi-channel signal generation.
• Process control and industrial automation instrumentation.
• Automatic test equipment needing precise voltage references.
• Automotive electronic control units.

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the C-grade designation aligns with the required 0°C to 70°C operating environment for the target application. Ensure compatibility with the 20-lead thermally enhanced TSSOP footprint during PCB layout review.

Selection Notes

Select this model for applications requiring eight isolated DAC channels with integrated reference capabilities. The -L12 suffix specifies a 2.5V full-scale output range derived from the internal 1.25V reference. Choose the C-grade variant only if the ambient temperature remains within the commercial range; otherwise, consider the I-grade option for extended industrial temperatures.

Part Context

This component belongs to the LTC2657 family of octal I²C DACs. It shares architectural similarities with the quad-channel LTC2655 and the 16-bit resolution variants like the LTC2657BIFE-H16. The primary distinction lies in the channel count, resolution options, and package types available across the series.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Verify pinout and electrical parameter compatibility before substituting with other octal DACs or different resolution variants within the same manufacturer's portfolio.