LTC2635CUD-LMX12#TRPBF

Overview

The LTC2635CUD-LMX12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the operating temperature range.

Feature Summary

• Quad 12-bit resolution with integrated 2.5V precision reference
• I²C-compatible serial interface with selectable internal or external reference
• Power-on reset configured to mid-scale in external reference mode
• Ultralow crosstalk between DACs (3nV•s typical)

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable equipment requiring low power consumption

Procurement Notes

Verify that the specific suffix LMX12 corresponds to the required power-on reset behavior (mid-scale in external reference mode) and the 12-bit resolution. Confirm the C-grade commercial temperature rating (0°C to 70°C) meets system requirements. Ensure the QFN package thermal management aligns with the application's power dissipation limits.

Selection Notes

Select this component when four independent 12-bit channels are needed with high accuracy and low noise. The LMX suffix is critical for designs requiring a specific mid-scale initialization state when using an external reference. Compare against the LZ suffix if zero-scale reset is preferred, or the MI suffix if internal reference reset is sufficient.

Part Context

This part belongs to the LTC2635 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The 'UD' designation indicates the 16-pin 3mm × 3mm QFN package. The '#TRPBF' suffix denotes lead-free construction and tape-and-reel packaging containing 2,500 pieces.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material.