LTC2654IUF-L12#TRPBF

Overview

The LTC2654IUF-L12#TRPBF is a quad 12-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead 4mm × 4mm plastic QFN package. It features an integrated reference with a maximum temperature coefficient of 10ppm/°C and built-in high-performance output buffers guaranteed monotonic over temperature. Operating within an industrial temperature range of –40°C to 85°C, the device supports a supply voltage of 2.7V to 5.5V for its -L variant or 4.5V to 5.5V for the -H variant. It communicates via a 4-wire SPI/Microwire compatible interface with clock rates up to 50MHz.

Feature Summary

• Quad 12-bit resolution with ±1 LSB maximum INL error
• Integrated 10ppm/°C max precision reference with selectable internal or external mode
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• Power-on reset configurable to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free construction. Confirm the 'I' grade matches the required –40°C to 85°C industrial operating temperature range. Ensure the 'L12' designation aligns with the 2.5V full-scale internal reference requirement and 12-bit resolution specifications for the target design.

Selection Notes

Select this part when four independent 12-bit DAC channels are required in a compact QFN footprint. The -L option is suitable for single-supply operation down to 2.7V, while the -H option requires 4.5V minimum for its 4.096V full-scale output. Consider the external reference capability if system-level accuracy requirements exceed the integrated 10ppm/°C specification.

Part Context

This component belongs to the LTC2654 family, which offers both 16-bit and 12-bit resolutions. The IUF suffix indicates the Industrial temperature grade and 20-lead QFN package. Other variants include the GN SSOP package and C-grade commercial temperature options. The L12 designation specifically sets the internal reference to 1.25V, resulting in a 0V to 2.5V output span.

Replacement Considerations

Direct replacements within the same package and electrical characteristics include LTC2654CUF-L12#TRPBF (Commercial grade) or LTC2654BIUF-L12#TRPBF (B-grade accuracy). For higher resolution needs, consider the LTC2654BIUF-L16#TRPBF. Verify that the replacement maintains the 12-bit resolution and industrial temperature range requirements.