LTC2656IUFD-H12#PBF

Overview

The LTC2656IUFD-H12#PBF is an octal, 12-bit digital-to-analog converter (DAC) from Analog Devices. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C and operates on a single 4.5V to 5.5V supply. The device provides rail-to-rail output buffers for all eight channels and guarantees monotonicity over the full operating temperature range (-40°C to 85°C). Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. The part is housed in a 20-lead 4mm × 5mm QFN package.

Feature Summary

• Octal architecture with 12-bit resolution and ±1 LSB maximum INL error
• Integrated 2.048V reference with 10ppm/°C max temperature coefficient
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• Power-on reset configurable to zero-scale or mid-scale

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Instrumentation
• Automatic Test Equipment
• Automotive Systems

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'H' suffix indicates a 4.096V full-scale output requiring a 4.5V to 5.5V supply voltage. The 'UFD' designation confirms the 20-lead QFN package. Ensure the '#PBF' suffix is present if lead-free compliance is mandatory for the assembly process.

Selection Notes

Select this component when eight independent DAC channels are required within a compact footprint. The H-series internal reference sets the full-scale output to 4.096V, suitable for applications needing higher voltage swings than the L-series. Verify that the system power supply remains within the 4.5V to 5.5V range to ensure specified performance and linearity.

Part Context

This part belongs to the LTC2656 family of octal DACs. Variants exist with different resolutions (12-bit vs 16-bit), accuracy grades (B-grade vs C-grade), and internal reference voltages (L-series for 2.5V vs H-series for 4.096V). The IUFD-H12 specifically combines industrial temperature rating, high accuracy, and the higher voltage reference option.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2656IUFD-L12#PBF (2.5V reference, lower supply range) or the LTC2656BIUFD-H16#PBF (16-bit resolution). Cross-vendor replacements require verification of pinout compatibility, serial interface timing, and reference voltage matching.