LTC2634HUD-HZ8#PBF

Overview

The LTC2634HUD-HZ8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) featuring an integrated precision reference with a full-scale output of 4.096V. It operates from a single 4.5V to 5.5V supply and utilizes a 16-lead QFN package. The device communicates via a 50MHz SPI/MICROWIRE compatible interface and includes rail-to-rail output buffers. Key specifications include a maximum integral nonlinearity error of ±0.5 LSB, a settling time of 3.8µs at ±1 LSB for 8-bit resolution, and a power-on reset to zero-scale in internal reference mode.

Feature Summary

• Quad 8-bit DAC architecture with 4.096V full-scale output
• Integrated 10ppm/°C precision reference
• SPI/MICROWIRE compatible 3-wire serial interface up to 50MHz
• Power-on reset to zero-scale in internal reference mode
• Rail-to-rail output buffers guaranteed monotonic over -40°C to 125°C

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive applications

Procurement Notes

Verify the H-grade temperature rating (-40°C to 125°C) and the Z suffix indicating zero-scale power-on reset behavior. Confirm the #PBF designation ensures lead-free compliance. Ensure the 16-lead QFN footprint matches the PCB layout requirements, specifically the exposed ground pad connection.

Selection Notes

Select this part when a quad DAC configuration with 4.096V full-scale range is required. The H-grade variant supports extended automotive temperatures compared to C or I grades. The Z suffix ensures outputs initialize to zero upon power-up, which is critical for systems where downstream circuits must remain inactive during startup.

Part Context

This component belongs to the LTC2634 family, which offers various resolutions (8, 10, 12 bits) and reset configurations. The HUD suffix denotes the 16-lead QFN package, H indicates the high-temperature grade, Z specifies zero-scale reset, and 8 defines the 8-bit resolution.

Replacement Considerations

LTC2634CUD-HZ8#PBF: Identical electrical performance but limited to commercial temperature range (0°C to 70°C). LTC2634IUD-HZ8#PBF: Identical electrical performance but limited to industrial temperature range (-40°C to 85°C).