LTC2634HUD-LMX12#PBF

Overview

The LTC2634HUD-LMX12#PBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C temperature range, and communicates via a 50MHz SPI/MICROWIRE compatible interface. Key specifications include a maximum integral nonlinearity error of ±2.5 LSB, low noise performance, and ultralow crosstalk between channels.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers and guaranteed monotonic operation
• 50MHz SPI/MICROWIRE compatible serial interface
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive

Procurement Notes

Verify that the component matches the specified automotive temperature grade (-40°C to 125°C) and the H suffix indicating the 4.096V full-scale range. Confirm the package type is the 16-lead QFN and ensure the #PBF designation indicates lead-free compliance as per manufacturer standards.

Selection Notes

Select this part for applications requiring high accuracy and wide operating temperatures. The LMX suffix ensures the DAC outputs reset to mid-scale when using an external reference upon power-up. Ensure the system supply voltage remains within the 4.5V to 5.5V range required for the H-grade full-scale specification.

Part Context

This component belongs to the LTC2634 family of quad DACs available in 8-, 10-, and 12-bit resolutions. The HUD suffix identifies the specific combination of the H-grade automotive temperature rating, the UD 16-lead QFN package, and the LMX power-on reset configuration.

Replacement Considerations

Other members of the LTC2634 family may serve as substitutes if resolution or reset requirements differ. For example, the LTC2634CUD-LMX12#PBF offers identical electrical characteristics but is rated for the commercial temperature range (0°C to 70°C).

FAQ

What is the power-on reset behavior for the LTC2634HUD-LMX12?

Upon power-up, the DAC outputs reset to mid-scale relative to the external reference voltage because of the LMX suffix.

What is the maximum integral nonlinearity error for this device?

The maximum integral nonlinearity (INL) error is ±2.5 LSB for the 12-bit version.

Does this device support daisy-chain operation?

Yes, the QFN package includes a Serial Data Output (SDO) pin that allows for daisy-chaining multiple devices.