LTC2634CUD-HZ8#PBF

Overview

The LTC2634CUD-HZ8#PBF is a quad 8-bit voltage output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 16-lead QFN package and communicates via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity error of ±0.5 LSB, rail-to-rail output buffers, and a power-on reset function that clears outputs to zero-scale in internal reference mode.

Feature Summary

• Quad 8-bit resolution with ±0.5 LSB maximum INL error
• Integrated 4.096V full-scale reference with ±10ppm/°C drift
• Power-on reset to zero-scale for consistent initialization
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the C temperature grade matches the application's operational range of 0°C to 70°C. Ensure the H designation for 4.096V full-scale output aligns with system voltage requirements, necessitating a 4.5V minimum supply.

Selection Notes

Select this part when zero-scale power-up behavior is required for safety or initialization purposes. The 8-bit resolution is suitable for applications not requiring high precision. Verify that the 4.5V to 5.5V supply constraint fits the design, as lower voltages are insufficient for the 4.096V output swing.

Part Context

This component belongs to the LTC2634 family, which offers variations in resolution (8, 10, 12 bits), temperature grades (C, I, H), and power-on reset behaviors (Zero-Scale Z, Mid-Scale MI/MX). The CUD package denotes the commercial temperature grade in a 16-lead QFN form factor.

Replacement Considerations

Direct substitutes within the same family include LTC2634CUD-HZ10#PBF (10-bit) or LTC2634CUD-HZ12#PBF (12-bit) if higher resolution is needed. For mid-scale reset options, consider LTC2634CUD-HMI8#PBF. Package compatibility remains consistent across the QFN variants.