LTC2634HUD-HMX12#PBF

Overview

The LTC2634HUD-HMX12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity error of ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the -40°C to 125°C temperature range. The H suffix denotes the automotive temperature grade, while MX indicates power-on reset to mid-scale in external reference mode.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• SPI/MICROWIRE compatible 3-wire serial interface operating at 50MHz
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Guaranteed monotonic operation over -40°C to 125°C temperature range

Applications

• Automotive systems requiring AEC-Q100 qualified components
• Process control and industrial automation equipment
• Portable battery-powered instrumentation
• Automatic test equipment

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm package type, temperature grade, and power-on reset behavior. Ensure that the external reference mode configuration aligns with system requirements for the MX variant. Confirm RoHS compliance status through manufacturer datasheets prior to procurement.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and wide temperature tolerance is required. The H-grade ensures performance from -40°C to 125°C. The MX suffix configures the device to reset to mid-scale using an external reference upon power-up. Verify that the supply voltage remains within the 4.5V to 5.5V range for specified performance.

Part Context

This part belongs to the LTC2634 family of quad DACs available in 12-, 10-, and 8-bit resolutions. Variants are distinguished by full-scale voltage (L for 2.5V, H for 4.096V), temperature grade (C, I, H), and power-on reset settings (MI, MX, Z). The HUD package identifies the 16-lead QFN form factor.

Replacement Considerations

Direct replacements must match the 12-bit resolution, quad channel count, and 16-lead QFN package. Consider variants like LTC2634IUD-HMX12#PBF for industrial temperature ranges or LTC2634CUD-HMX12#PBF for commercial ranges if thermal constraints allow.