LTC2635CMSE-LMX8#PBF

Overview

The LTC2635CMSE-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 operates on a single 2.7V to 5.5V supply. The device utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a settling time of 3.5µs, low noise of 0.75mVP-P (0.1Hz to 200kHz), and guaranteed monotonicity over the commercial temperature range of 0°C to 70°C. It incorporates double-buffered data latches and ultralow crosstalk between DACs.

Feature Summary

• Quad 8-Bit Voltage-Output DAC with Integrated 2.5V Precision Reference
• I2C-Compatible Serial Interface with Standard and Fast Mode Support
• Rail-to-Rail Output Buffers Guaranteed Monotonic Over Temperature
• Power-On Reset to Mid-Scale in External Reference Mode (LMX)
• Low Power Consumption: 0.6mA at 3V Supply

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment

Procurement Notes

Verify the package type matches the MSE (10-Lead MSOP) designation in the part number. Confirm the L suffix indicates the 2.5V internal reference and the X8 suffix specifies 8-bit resolution. Ensure the C grade meets the required 0°C to 70°C operating temperature range for the specific application environment.

Selection Notes

Select this component when four independent 8-bit voltage outputs are required with minimal external reference components. The LMX variant is appropriate if power-on reset to mid-scale is desired when using an external reference source. Consider the H-grade variants if automotive temperature ranges (-40°C to 125°C) or higher 4.096V full-scale outputs are necessary.

Part Context

This part belongs to the LTC2635 family, which includes 12-, 10-, and 8-bit resolutions. The CMSE suffix denotes the Commercial temperature grade and 10-lead MSOP package. The #PBF suffix indicates lead-free construction compliant with RoHS standards. Other variants in the family offer different reset behaviors (Z, MI, MO) and reference configurations.

Replacement Considerations

Direct replacements within the same family include LTC2635MSE-LMI8#PBF (internal reference reset) or LTC2635MSE-LZ8#PBF (zero-scale reset). For higher resolution needs, consider LTC2635MSE-LMX10#PBF or LTC2635MSE-LMX12#PBF. Cross-family SPI-based alternatives like the LTC2636 series require interface redesign.