LTC2635HUD-LZ12#PBF

Overview

The LTC2635HUD-LZ12#PBF is a quad 12-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 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers and guarantees monotonicity over the automotive temperature range of –40°C to 125°C. Communication occurs via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. A power-on reset circuit defaults outputs 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
• Automotive grade operation from –40°C to 125°C
• Power-on reset to zero-scale with low noise (0.75mV P-P)

Applications

• Process control and industrial automation
• Portable equipment
• Mobile communications

Procurement Notes

Verify the specific suffix 'HUD' against official documentation to confirm package type and temperature grade alignment. Ensure the '#PBF' designation matches lead-free requirements for the target assembly process. Cross-reference the datasheet revision D specifications for electrical characteristics relevant to the H-grade variant.

Selection Notes

Select this part when a 4.096V internal reference is required for 12-bit accuracy in automotive or industrial environments. The H-grade variant necessitates a minimum supply voltage of 4.5V. Consider the QFN package thermal characteristics and ensure PCB layout supports the exposed ground pad connection for optimal performance.

Part Context

This component belongs to the LTC2635 family of quad DACs. The 'H' suffix indicates the 4.096V full-scale range and automotive temperature rating. The 'UD' denotes the 16-pin QFN package. The 'LZ' specifies the power-on reset behavior to zero-scale. The '12' identifies the 12-bit resolution within the series.

Replacement Considerations

Direct substitutes include other LTC2635 variants with different resolutions (8-bit or 10-bit) or reset behaviors (mid-scale), provided the supply voltage and package constraints are met. Verify pin compatibility and electrical parameters before substitution.