LTC2656IUFD-H12#TRPBF

Overview

The LTC2656IUFD-H12#TRPBF is an octal 12-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output voltage of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes built-in high-performance output buffers guaranteed monotonic over temperature. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. It incorporates a power-on reset circuit configurable for zero-scale or mid-scale initialization.

Feature Summary

• Octal 12-bit resolution with ±1 LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C max temperature coefficient
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing this component. Ensure the supplier documentation matches the industrial temperature grade (-40°C to 85°C) indicated by the 'I' in the part number. Confirm lead-free finish compliance through manufacturer certificates.

Selection Notes

Select the -H option for applications requiring a 4.096V full-scale output range, which necessitates a 4.5V to 5.5V supply voltage. Choose the -L option if a 2.5V full-scale output is sufficient, as it supports a wider 2.7V to 5.5V supply range. Verify that the 12-bit resolution meets system accuracy requirements compared to the available 16-bit variants.

Part Context

This component belongs to the LTC2656 family of octal DACs, which also includes 16-bit versions and commercial temperature grade options. The IUFD designation indicates the industrial temperature grade and the 20-lead 4mm × 5mm QFN package type. The H12 suffix specifies the 4.096V internal reference configuration and 12-bit resolution.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2656 variants such as the LTC2656IUFD-L12#TRPBF for lower voltage operation or LTC2656BIUFD-H16#TRPBF for higher resolution. Cross-family alternatives like the LTC2620 require interface and pinout verification.