LTC2635HUD-LMO8#PBF

Overview

The LTC2635HUD-LMO8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead QFN package. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. 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 ±0.5 LSB, rail-to-rail buffered outputs, and guaranteed monotonicity over the –40°C to 125°C automotive temperature range.

Feature Summary

• Quad 8-Bit Resolution: Provides four independent DAC channels with ±0.5 LSB maximum INL error.
• Automotive Temperature Range: Guaranteed monotonic operation from –40°C to 125°C.
• Integrated Precision Reference: Internal 10ppm/°C reference sets a 2.5V full-scale output.
• Power-On Reset Configuration: Resets to mid-scale internally while placing all DAC outputs in a high-impedance state.

Applications

• Process Control and Industrial Automation
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix LMO against the manufacturer's documentation to confirm the power-on reset behavior. The LMO suffix indicates a reset to mid-scale in internal reference mode with DAC outputs in a high-impedance state. Ensure the procurement source provides the original datasheet for the LTC2635 family to validate these functional parameters.

Selection Notes

Select this component when four low-resolution, low-power DACs are required in an automotive environment. The LMO variant is suitable for applications requiring safe high-impedance outputs upon startup. Compare settling times and noise specifications against other resolutions if higher precision is needed later in the design cycle.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also includes 10-bit and 12-bit variants. The 'H' grade denotes the automotive temperature range, while 'UD' specifies the 16-pin QFN package. Other suffixes like LZ or LMI offer different power-on reset behaviors such as zero-scale or mid-scale without high-impedance outputs.

Replacement Considerations

Direct replacements within the same family include LTC2635HUZ8#PBF (zero-scale reset) or LTC2635HMSE8#PBF (MSOP package). Verify that the alternative part number maintains the required power-on reset state and package dimensions for PCB compatibility.