LTC2635CUD-LMX8#PBF

Overview

The LTC2635CUD-LMX8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 voltage ranging from 2.7V to 5.5V. It includes rail-to-rail output buffers and is guaranteed monotonic over the operating temperature range. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The part incorporates a power-on reset circuit configured to reset outputs to mid-scale when using an external reference.

Feature Summary

• Quad 8-Bit Resolution with Integrated 2.5V Precision Reference
• I2C-Compatible Serial Interface with Standard and Fast Modes
• Power-On Reset to Mid-Scale in External Reference Mode
• Rail-to-Rail Output Buffers Guaranteed Monotonic

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Portable Equipment

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction. Confirm the package type UD corresponds to the 16-pin QFN format. Ensure the LMX suffix requirement for mid-scale reset with external references matches the system design needs. Check that the C grade commercial temperature range meets application requirements.

Selection Notes

Select this component for applications requiring four independent 8-bit DAC channels with low pin count. The LMX variant is necessary if the design uses an external reference voltage but requires mid-scale initialization upon power-up. The 2.7V to 5.5V supply range supports various single-supply logic levels. Consider the ±0.5 LSB INL specification for required accuracy.

Part Context

This part belongs to the LTC2635 family, which includes 12-bit, 10-bit, and 8-bit variants. The 'L' designation indicates a 2.5V full-scale internal reference, while 'H' denotes 4.096V. The 'UD' suffix specifies the 16-lead QFN package. Other reset options include zero-scale (Z) or high-impedance (MO) states depending on the middle suffix character.

Replacement Considerations

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