LTC2634IMSE-LZ8#TRPBF

Overview

The LTC2634IMSE-LZ8#TRPBF is a quad 8-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates from a single 2.7V to 5.5V supply and includes rail-to-rail output buffers. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to zero-scale in internal reference mode.

Feature Summary

• Quad 8-bit resolution with guaranteed monotonicity over the operating temperature range
• Integrated 10ppm/°C precision reference yielding a 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk between DACs (2.4nV•s)
• 3-wire serial interface (SPI/MICROWIRE) with SDO for daisy-chain operation

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the IMSE designation corresponds to the Industrial temperature grade (-40°C to 85°C) and the MSE package style. Ensure the LZ8 suffix aligns with the required 8-bit resolution and zero-scale power-on reset configuration for the target application.

Selection Notes

Select this component when four independent 8-bit channels are required in a compact surface-mount footprint. The internal 2.5V reference simplifies design by eliminating external reference components. Verify that the 2.7V minimum supply voltage meets system requirements, as higher voltage variants (LTC2634-H) require a minimum of 4.5V.

Part Context

This part belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both 16-lead QFN and 10-lead MSOP packages. The IMSE variant specifically denotes the Industrial temperature grade housed in the MSOP-10 package. The family shares common architectural features including double-buffered data latches and selectable internal or external reference modes.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2634 variants such as LTC2634IMSE-LZ10#TRPBF or LTC2634IMSE-LZ12#TRPBF if higher resolution is acceptable. For automotive applications, verify AEC-Q100 qualified equivalents like the LTC2634W series.