LTC2657CUFD-H12#TRPBF

Overview

The LTC2657CUFD-H12#TRPBF is an octal 12-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, providing a full-scale output voltage of 4.096V in internal reference mode. The device operates on a single supply ranging from 4.5V to 5.5V and includes built-in rail-to-rail output buffers. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, guaranteed monotonicity over the operating temperature range, and ultralow crosstalk between channels at 0.8nV•s. The component supports standard (100kHz) and fast (400kHz) I²C clock rates.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated reference delivering 4.096V full-scale output with ≤10ppm/°C drift
• Maximum INL error of ±1 LSB and guaranteed monotonic operation
• Ultralow channel-to-channel crosstalk of 0.8nV•s typical

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF confirms tape and reel packaging for automated assembly. Confirm the H-grade designation aligns with the required 4.5V to 5.5V supply voltage range. Ensure the C-grade temperature specification meets the operational environment requirements of 0°C to 70°C. Cross-reference the specific part number against current manufacturer documentation to validate availability status.

Selection Notes

Select this model when eight isolated analog outputs are required within a compact footprint. The H-option is mandatory if the system design relies on the integrated 4.096V reference; otherwise, consider L-options for lower voltage supplies. Verify that the I²C bus speed requirements do not exceed 400kHz. Check pin configuration compatibility with the chosen QFN-20 layout, ensuring the exposed pad is soldered to ground for thermal management.

Part Context

This component belongs to the LTC2657 family of octal DACs, which also includes variants with 16-bit resolution and different package styles such as TSSOP. The CUFD suffix identifies the commercial temperature grade and the 20-lead QFN package format. The H12 designation specifically denotes the high-voltage internal reference option paired with 12-bit resolution, distinguishing it from the L12 variant which provides a 2.5V full-scale output.

Replacement Considerations

Direct replacements within the same family include the LTC2657IUFD-H12#TRPBF for industrial temperature ranges or the LTC2657BCUFD-H12#TRPBF for tighter linearity specifications. Other packages like the FE variant offer equivalent functionality in a TSSOP form factor.