LTC2636HDE-LZ8#PBF

Overview

The LTC2636HDE-LZ8#PBF is an octal, 8-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 supply voltage ranging from 4.5V to 5.5V. It communicates via a 3-wire SPI/MICROWIRE-compatible serial interface supporting clock rates up to 50MHz. Key electrical characteristics include a maximum integral nonlinearity error of ±0.5 LSB, a settling time of 3.8µs at 5V, and ultralow DAC-to-DAC crosstalk below 2.4nV•s. The unit is housed in a 14-lead DFN package and guarantees monotonicity over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Octal 8-Bit Architecture: Provides eight independent voltage-output channels with rail-to-rail buffers in a compact 14-lead DFN package.
• Integrated Precision Reference: Includes a 4.096V internal reference with low drift (10ppm/°C), eliminating the need for external components.
• Automotive Grade Reliability: Designed for operation across the extended temperature range of –40°C to 125°C with guaranteed monotonicity.
• High-Speed Serial Interface: Supports SPI/MICROWIRE protocols with clock frequencies up to 50MHz for rapid data transfer.

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF confirms lead-free construction and RoHS compliance as per manufacturer standards. Confirm the DE package designation corresponds to the 14-lead DFN form factor required for the PCB layout. Ensure the H-grade specification matches the system's power supply constraints, as this variant requires a minimum of 4.5V.

Selection Notes

Select the LTC2636HDE-LZ8#PBF when an octal configuration is required alongside high-precision analog performance in automotive or industrial environments. The 'H' suffix dictates a 4.5V to 5.5V supply range, distinguishing it from the lower-voltage 'L' variants. The 'Z' suffix ensures a zero-scale power-on reset state, which is critical for systems requiring safe initialization without intermediate voltage glitches.

Part Context

This component belongs to the LTC2636 family of octal DACs, which offers various resolution and package options. The HDE-LZ8 variant specifically targets applications needing 8-bit accuracy with a 4.096V span in an automotive-rated environment. It shares the same core architecture and serial interface as other members but differs in temperature grade, reset behavior, and supply voltage requirements.

Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC2636IDE-LZ8#PBF (Industrial grade, –40°C to 85°C) or the LTC2636CDE-LZ8#PBF (Commercial grade, 0°C to 70°C). For higher resolution needs, the LTC2636HDE-LZ12#PBF (12-bit) is available. Note that these alternatives share the same package and interface but differ in operating temperature ranges and linearity specifications.