LTC2635HUD-LZ12#TRPBF

Overview

The LTC2635HUD-LZ12#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 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 4.5V to 5.5V and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and a power-on reset circuit configured to zero-scale.

Feature Summary

• Quad 12-bit resolution with maximum INL error of ±2.5 LSB
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• I²C interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset to zero-scale in internal reference mode

Applications

• Process control and industrial automation
• Automotive systems
• Portable equipment
• Power supply margining

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C and the 4.5V to 5.5V supply requirement. Ensure the LZ12 code matches the 12-bit resolution and zero-scale power-on reset configuration.

Selection Notes

Select this part for applications requiring four independent 12-bit channels with high accuracy and low drift. The H-grade variant is necessary for environments exceeding 70°C or requiring operation down to –40°C. The internal 4.096V reference simplifies design by eliminating external reference components, provided the supply voltage remains within the 4.5V to 5.5V window.

Part Context

This component belongs to the LTC2635 family, which offers 8-, 10-, and 12-bit resolutions in both L-grade (2.5V FS, 2.7V–5.5V supply) and H-grade (4.096V FS, 4.5V–5.5V supply) versions. The HUD package denotes a 16-pin QFN form factor. Other variants in the series differ by resolution, full-scale voltage, operating temperature range, and power-on reset behavior.

Replacement Considerations

Direct replacements within the same family include LTC2635HMD-LZ12 (MSOP package) or LTC2635HUD-HZ12 (different reset behavior). Cross-family replacements require verification of pin compatibility, I²C addressability, and electrical specifications against the original design requirements.