LTC2635HUD-LMX12#TRPBF

Overview

The LTC2635HUD-LMX12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) featuring an integrated precision reference with a temperature coefficient of 10ppm/°C. It operates from a single 4.5V to 5.5V supply, providing a full-scale output of 4.096V in internal reference mode. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical characteristics include a maximum integral nonlinearity error of ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• I²C interface with selectable power-on reset to mid-scale
• Automotive grade operation from –40°C to 125°C

Applications

• Process control and industrial automation systems
• Portable equipment requiring low power consumption
• Power supply margining applications
• Automotive electronic modules

Procurement Notes

Verify the specific ordering suffix LMX12#TRPBF against the manufacturer's current datasheet revision D documentation. Confirm that the H-grade designation aligns with the required 4.5V to 5.5V supply voltage range and that the TRPBF suffix corresponds to the specified tape and reel packaging quantity for production integration.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and automotive reliability is required. The H-grade variant is necessary for 4.096V full-scale outputs, while the L-grade supports 2.7V to 5.5V supplies with 2.5V full-scale. Ensure the system design accommodates the 4.5V minimum supply voltage for the H-grade part and utilizes the I²C address pins CA0-CA2 for multi-device addressing.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also includes 8-bit and 10-bit variants. The H suffix denotes the automotive temperature grade and 4.096V internal reference capability, distinguishing it from the C-grade commercial parts and L-grade lower voltage options. The device shares the same 16-pin QFN or 10-lead MSOP package footprint as other members of the series.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2635HMI12#TRPBF (mid-scale reset) and LTC2635HZ12#TRPBF (zero-scale reset). Verify that the alternative part's power-on reset behavior matches the system requirements, as the LMX suffix specifically configures reset to mid-scale in external reference mode.