LTC2634HUD-LZ12#PBF

Overview

The LTC2634HUD-LZ12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead 3mm x 3mm QFN package. 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, double-buffered data latches, and an SPI/Microwire compatible 3-wire serial interface supporting clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.8µs at 5V, and a power-on reset function that clears outputs to zero-scale. It is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• AEC-Q100 Qualified for Automotive Applications
• Integrated Precision Reference with 10ppm/°C Drift
• Maximum INL Error: ±2.5 LSB
• Low Noise: 0.75mVP-P (0.1Hz to 200kHz)

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and standard tube packaging. Confirm the H-grade designation corresponds to the -40°C to 125°C operating temperature range required for automotive environments. Ensure the LZ12 suffix matches the 4.096V full-scale output and zero-scale power-on reset configuration. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm current production status and availability channels.

Selection Notes

Select this component when a quad 12-bit DAC with high accuracy and automotive qualification is required. The H-grade variant necessitates a supply voltage between 4.5V and 5.5V, unlike the L-grade which supports 2.7V. The LZ12 suffix ensures the outputs reset to zero-scale upon power-up, which is critical for systems where downstream circuits must remain inactive during initialization. Verify that the 16-lead QFN package fits the PCB footprint constraints.

Part Context

This part belongs to the LTC2634 family of quad DACs, which offers various resolutions (8, 10, and 12 bits) and power-on reset options. The HUD package denotes the 16-lead QFN form factor, while the H suffix specifies the 4.096V internal reference range. The LZ12 combination uniquely identifies the 12-bit resolution, zero-scale reset behavior, and automotive grade temperature rating within this product line.

Replacement Considerations

Direct replacements within the same family include LTC2634HUD-HMX12#PBF (mid-scale reset) or LTC2634HUD-HMI12#PBF (mid-scale reset, external ref mode). For lower resolution needs, consider LTC2634HUD-HZ10#PBF or LTC2634HUD-HZ8#PBF. Ensure any substitute maintains the AEC-Q100 qualification if automotive reliability is mandatory.