LTC2634IMSE-HZ8#PBF

Overview

The LTC2634IMSE-HZ8#PBF is a quad 8-bit voltage output DAC in a 10-lead MSOP package. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates from a single 4.5V to 5.5V supply and includes rail-to-rail output buffers. It guarantees monotonicity over the -40°C to 125°C automotive temperature range. Communication occurs via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Power-on reset 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 (10ppm/°C drift)
• Automotive qualified (AEC-Q100) for -40°C to 125°C operation
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the HZ8 suffix indicates the specific combination of 4.096V full-scale, zero-scale power-on reset, and 8-bit resolution within the automotive grade (-H) and MSOP package (-MSE). Confirm lead-free status (#PBF) and tape/reel packaging if required by assembly equipment. Ensure the source document matches the exact part number to avoid confusion with similar L-series or MI/MX variants.

Selection Notes

Select this component when four independent 8-bit channels are required with high accuracy and automotive reliability. The 4.096V internal reference eliminates external reference components. Choose the HZ variant specifically for zero-scale initialization upon power-up. Verify that the system supply voltage remains between 4.5V and 5.5V to meet electrical specifications.

Part Context

This part belongs to the LTC2634 family of quad DACs, which offers various resolutions (8, 10, 12-bit), full-scale voltages (2.5V or 4.096V), and power-on reset behaviors (zero or mid-scale). The IMSE designation specifies the Industrial/Automotive temperature grade, MSOP package, and specific configuration options defined by the ordering code structure.

Replacement Considerations

Direct substitutes include other LTC2634 variants with matching resolution and package, such as LTC2634IMSE-HZ12#PBF for 12-bit resolution. Cross-family replacements require verifying pin compatibility and electrical performance. No alternative part numbers are explicitly listed as direct replacements in the provided datasheet.