LTC2635CUD-LZ10#PBF

Overview

The LTC2635CUD-LZ10#PBF is a quad 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead 3mm × 3mm QFN package. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and includes rail-to-rail output buffers that are guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled 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 10-bit resolution with maximum INL error of ±1 LSB
• Integrated 2.5V precision reference with 10ppm/°C drift
• Rail-to-rail output buffers guaranteed monotonic from 0°C to 70°C
• I²C interface with selectable slave addresses via CA0–CA2 pins

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction. Confirm the UD package designation corresponds to the 16-pin QFN form factor. Ensure the LZ power-on reset configuration aligns with system requirements for zero-scale initialization upon power-up. Cross-reference the C-grade temperature rating against the intended operating environment limits.

Selection Notes

Select this component when a quad DAC configuration with low crosstalk (3nV•s) and ultralow noise (0.75mV P-P) is required. The 2.5V full-scale range suits applications where the internal reference eliminates external components. Consider the H-grade variant if automotive temperature ranges (-40°C to 125°C) or a 4.096V full-scale output are necessary. Verify I²C bus compatibility for standard and fast mode operation.

Part Context

This part belongs to the LTC2635 family, which includes 8-bit, 10-bit, and 12-bit variants. The 'L' suffix denotes the 2.5V full-scale internal reference option, while 'Z' specifies the zero-scale power-on reset behavior. The 'UD' package code identifies the 16-pin QFN housing, distinguishing it from the 10-lead MSOP option.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.