LTC2634CUD-HMX12#TRPBF

Overview

The LTC2634CUD-HMX12#TRPBF 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 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 ultralow crosstalk between DACs (2.4nV•s). It incorporates double-buffered data latches and a power-on reset circuit configured to set outputs to mid-scale in external reference mode upon initialization.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers guaranteed monotonic over -40°C to 125°C
• Ultralow DAC-to-DAC crosstalk of 2.4nV•s typical
• 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 the H-grade temperature rating (-40°C to 125°C) and the MX suffix indicating mid-scale reset in external reference mode. Confirm the TRPBF suffix denotes a tape and reel packaging format containing 2,500 pieces. Ensure the QFN package type matches the design requirements for the exposed pad soldering.

Selection Notes

Select this part when a quad 12-bit DAC with high accuracy (±2.5 LSB INL) and low noise is required. The H-grade variant supports higher supply voltages (4.5V–5.5V) compared to the L-grade. The MX suffix is critical if the application requires outputs to settle at mid-scale during power-up using an external reference source rather than zero-scale or internal reference modes.

Part Context

This component belongs to the LTC2634 family of quad DACs available in 8-, 10-, and 12-bit resolutions. The CUD designation indicates the commercial temperature grade (0°C to 70°C) is not applicable here; the H suffix denotes the automotive/high-temperature grade (-40°C to 125°C). The UD package specifies the 16-lead 3mm × 3mm QFN form factor.

Replacement Considerations

Direct substitutes within the same family include LTC2634HMX12#PBF (tube packaging) or LTC2634HMX12#TRMPBF (500-unit reel). Variants with different reset behaviors like LTC2634HZ12 or different resolutions such as LTC2634HMX10 are functionally similar but require verification of pin compatibility and performance parameters.