LTC2635CUD-LMI12#TRPBF

Overview

The LTC2635CUD-LMI12#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 supply ranging from 2.7V to 5.5V 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 slave addresses
• Power-on reset configured for mid-scale output in internal reference mode
• Ultralow crosstalk between DAC channels (3nV•s typical)

Applications

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

Procurement Notes

Verify that the package type matches the 16-pin QFN specification indicated by the 'UD' suffix in the part number. Confirm the temperature grade corresponds to the commercial range (0°C to 70°C) as specified by the 'C' suffix. Ensure the order quantity aligns with the tape and reel packaging format defined by the 'TR' suffix.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and low power consumption is required. The internal 2.5V reference simplifies design by eliminating external reference components. The I2C interface reduces pin count compared to SPI alternatives. Verify that the 2.7V minimum supply voltage meets system requirements, as higher voltage variants are available for different supply constraints.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also includes 8-bit and 10-bit resolution options. The specific model combines the 12-bit resolution with the 'L' variant's 2.5V full-scale output and commercial temperature rating. It is distinct from the 'H' variant, which offers a 4.096V full-scale output but requires a higher minimum supply voltage.

Replacement Considerations

Direct replacements within the same family include the LTC2635CUD-LZ12#TRPBF (zero-scale reset) or LTC2635CUD-LMX12#TRPBF (external reference reset). For lower resolution needs, the LTC2635CUD-LMI10 or LTC2635CUD-LMI8 offer similar performance with reduced bit depth.