LTC2634IMSE-LMX8#PBF

Overview

The LTC2634IMSE-LMX8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference with a full-scale output of 2.5V and operates from a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 85°C temperature range, and communicates via a 50MHz SPI/MICROWIRE compatible interface. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 2.5V full-scale reference
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• SPI/MICROWIRE compatible 3-wire serial interface up to 50MHz
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS requirements. Confirm the IMSE designation corresponds to the Industrial temperature grade (-40°C to 85°C) and the MSE package type. Ensure the LMX8 configuration matches the required power-on reset behavior for external reference applications.

Selection Notes

Select this part when four independent 8-bit channels are required with low power consumption. The LMX8 variant is suitable for designs where outputs must initialize to mid-scale during power-up in external reference configurations. Verify that the 2.5V internal reference range meets the application's voltage swing requirements.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also offers 10-bit and 12-bit resolutions. Variants include QFN packages and different temperature grades (C, I, H). The IMSE-LMX8 specifically targets industrial applications requiring precise initialization states.

Replacement Considerations

LTC2634IMSE-LMI8#PBF: Identical specifications except power-on reset defaults to mid-scale in internal reference mode.

FAQ

What is the settling time for the LTC2634IMSE-LMX8?

The typical settling time to ±1LSB (8-bit) is 3.3µs at VCC = 3V.

How does the power-on reset function in this specific model?

The LMX8 suffix indicates the device resets to mid-scale in external reference mode upon power-up.

What is the maximum clock rate for the serial interface?

The SPI/MICROWIRE compatible interface supports clock rates up to 50MHz.