LTC2634CUD-HZ12#TRPBF

Overview

The LTC2634CUD-HZ12#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 a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and utilizes a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, a settling time of 4.8µs at 12-bit resolution, and rail-to-rail output buffers. The unit is housed in a 16-lead 3mm × 3mm QFN package and includes power-on reset functionality that clears outputs to zero-scale.

Feature Summary

• Quad 12-bit DAC architecture with integrated 4.096V precision reference
• Rail-to-rail output buffers with guaranteed monotonicity over the operating range
• 3-wire serial interface (SPI/MICROWIRE) with 50MHz clock capability
• Power-on reset circuit configured to clear outputs to zero-scale

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging format containing 2,500 units. Confirm the C temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the H designation for full-scale voltage aligns with the required 4.5V to 5.5V supply voltage constraints for this specific part number.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and low drift is required. The H variant necessitates a minimum supply voltage of 4.5V, distinguishing it from the L variant which supports 2.7V operation. The Z suffix ensures the outputs initialize to zero upon power-up, which is critical for applications where downstream circuits must remain inactive during startup.

Part Context

This part belongs to the LTC2634 family, which offers various combinations of resolution (8, 10, or 12 bits), package types (QFN or MSOP), and power-on reset behaviors. The CUD-HZ12 configuration specifically combines the commercial temperature grade, 16-lead QFN package, high full-scale voltage, and zero-scale reset behavior.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-LZ12#TRPBF for lower voltage operation or LTC2634IUD-HZ12#TRPBF for extended industrial temperature ranges. Verify pin compatibility and thermal characteristics when substituting between package variants.