LTC2655CUF-H12#PBF

Overview

The LTC2655CUF-H12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) in a 20-lead 4mm × 4mm QFN package. It features an integrated 2.048V reference, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes high-performance rail-to-rail output buffers guaranteed monotonic over temperature. Key electrical parameters include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 3.9µs to ±1 LSB, and a typical glitch impulse of 7nV•s at mid-scale transitions.

Feature Summary

• Quad 12-bit resolution with integrated 2.048V reference for 4.096V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• I2C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes
• Selectable power-on reset to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the component matches the specified commercial temperature range (0°C to 70°C) and the H-grade internal reference configuration (2.048V). Confirm the package type is the 20-lead 4mm × 4mm plastic QFN. Ensure the ordering suffix corresponds to the tube packaging format indicated by #PBF rather than tape and reel.

Selection Notes

Select this part when a quad DAC with I2C control and a fixed 4.096V output span is required. The -H suffix designates the 4.5V to 5.5V supply range and 2.048V internal reference. For lower voltage applications requiring a 2.5V full-scale output, consider the -L variant. Verify that the 12-bit resolution meets system accuracy requirements compared to the 16-bit B-grade options.

Part Context

This component belongs to the LTC2655 family of quad DACs. The CUH designation identifies the specific combination of the Commercial temperature grade (C), the 20-lead QFN package (U), and the High-voltage/High-reference option (H) with 12-bit resolution. It serves as a compact solution for multi-channel signal generation where board space is limited.

Replacement Considerations

Direct substitutes within the same package and specification include the LTC2655IUF-H12#PBF for extended industrial temperature ranges (-40°C to 85°C). Other family members like the LTC2655CGN-H12#PBF offer the same electrical performance but in a 16-lead SSOP package.