LTC2634CMSE-LMX8#PBF

Overview

The LTC2634CMSE-LMX8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 10-lead MSOP package. 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 includes rail-to-rail output buffers, guaranteed monotonicity over the commercial temperature range (0°C to 70°C), and communicates via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit resolution with ±0.5 LSB maximum Integral Nonlinearity (INL)
• Integrated 10ppm/°C precision reference providing 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 50MHz clock capability

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the MSE package designation corresponds to the 10-lead MSOP form factor required for the design. Ensure the LMX power-on reset configuration matches system initialization requirements for mid-scale output in external reference mode.

Selection Notes

Select this component when four independent 8-bit channels are required in a compact surface-mount package. The CMSE suffix denotes the commercial temperature grade (0°C to 70°C). Choose the LMX variant if mid-scale power-up is preferred over zero-scale or internal reference reset modes. Verify that the 2.5V internal reference range meets the application's output voltage swing needs.

Part Context

This part belongs to the LTC2634 family, which also offers 10-bit and 12-bit resolutions. Variants exist in 16-lead QFN packages and with different temperature grades (Industrial -40°C to 85°C, Automotive -40°C to 125°C). The CMSE-LMX8#PBF specifically targets cost-sensitive commercial applications requiring quad-channel DAC functionality with moderate accuracy.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2634 variants such as LTC2634IMSE-LMX8#PBF for extended temperature ranges. For higher resolution needs, consider LTC2634IMSE-LMX10#PBF or LTC2634IMSE-LMX12#PBF, noting potential changes in INL specifications and settling times.