LTC2635CUD-HZ12#TRPBF

Overview

The LTC2635CUD-HZ12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, 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 error of ±2.5 LSB, low noise of 0.75mVP-P (0.1Hz to 200kHz), and ultralow crosstalk between DACs at 3nV•s.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference (±10ppm/°C drift)
• Automotive temperature grade (-40°C to 125°C) with guaranteed monotonicity
• Rail-to-rail output buffers and selectable power-on reset options
• Ultralow DAC-to-DAC crosstalk (3nV•s) and low supply current (0.7mA typical)

Applications

• Process control and industrial automation systems
• Power supply margining applications
• Portable equipment requiring high accuracy
• Automotive electronic control units

Procurement Notes

Verify that the component matches the specific ordering suffix requirements for the 16-pin QFN package and tape-and-reel quantity. Confirm the internal reference voltage configuration aligns with the 'H' designation for 4.096V full-scale output. Ensure the lead-free designator (#PBF) meets environmental compliance standards for the target assembly process.

Selection Notes

Select this part when a quad-channel DAC with an integrated high-accuracy reference is required in a compact 16-pin QFN footprint. The 'H' variant is necessary for 4.096V full-scale outputs, requiring a minimum 4.5V supply. The 'Z' suffix configures the power-on reset to zero-scale, which is critical for applications demanding a known safe state upon initialization without external pull-down circuitry.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also includes 8-bit and 10-bit variants (LTC2635-L/MSE series). The CUD package denotes the commercial-grade 16-pin QFN form factor, while the H suffix indicates the automotive temperature range and higher voltage reference capability compared to the L-series parts.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2635 variants with different resolutions or reset configurations, such as LTC2635CUD-HZ10#TRPBF or LTC2635CUD-HMI12#TRPBF, provided the specific reset behavior and resolution meet the design requirements.