LTC2657CFE-H12#PBF

Overview

The LTC2657CFE-H12#PBF is an octal, 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features a high-performance rail-to-rail output buffer and an integrated reference with a maximum temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V, providing a full-scale output of 4.096V when using the internal reference. Communication is handled via a 2-wire I²C compatible serial interface supporting standard mode (100kHz) and fast mode (400kHz). The component includes a power-on reset circuit configurable for zero-scale or mid-scale initialization.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated precision reference yielding 4.096V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over temperature
• I²C interface with selectable slave addresses via CA0-CA2 pins

Applications

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

Procurement Notes

Verify the package type corresponds to the FE suffix, indicating a 20-lead thermally enhanced TSSOP. Confirm the H12 designation matches the required 4.5V to 5.5V supply range and 4.096V full-scale output. Ensure the C grade meets the commercial operating temperature requirements of 0°C to 70°C. Cross-reference the specific ordering suffixes against the manufacturer's current product selector guide to confirm availability and lead-free status.

Selection Notes

Select this part when eight isolated voltage outputs are required in a compact form factor. The H-option is necessary if the system requires a 4.096V full-scale range; otherwise, the L-option supports lower voltages down to 2.7V. Consider the ±1 LSB INL specification for linearity requirements. Verify that the I²C bus speed requirements align with the 400kHz fast mode capability. Ensure the PCB layout accommodates the thermal pad connection for the TSSOP package.

Part Context

This component belongs to the LTC2657 family of octal DACs. Variants exist with different resolutions (12-bit or 16-bit), accuracy grades (B-grade for ±4LSB INL), and supply ranges (L-option for 2.7V-5.5V, H-option for 4.5V-5.5V). The CFE suffix specifically denotes the commercial temperature grade and TSSOP packaging. Other packages include QFN (UFD), and other grades include Industrial (I).

Replacement Considerations

Direct replacements within the same family include LTC2657CUFD-H12#PBF for QFN packaging or LTC2657IFE-H12#PBF for industrial temperature range. For higher accuracy needs, consider the B-grade variants such as LTC2657BCFE-H12#PBF. Ensure pin compatibility and electrical specifications match before substitution.