LTC2636CDE-HMI8#PBF

Overview

The LTC2636CDE-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features eight independent channels with rail-to-rail output buffers and a guaranteed monotonic transfer function. The device integrates a high-accuracy reference providing a 4.096V full-scale output, operating within a 4.5V to 5.5V supply range. Communication is handled via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz. Power-on reset defaults the outputs to mid-scale in internal reference mode. The component is housed in a 14-lead plastic DFN package.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels with rail-to-rail output buffers.
• Integrated Reference: Internal 4.096V full-scale reference with ±10ppm/°C drift.
• High-Speed Interface: 3-wire serial interface compatible with SPI/MICROWIRE, operating at up to 50MHz.
• Power-On Reset: Configurable reset to mid-scale in internal reference mode upon power-up.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems
• Optical Networking

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction and tube packaging for the DE package variant. Confirm the C temperature grade matches commercial requirements of 0°C to 70°C. Ensure the H designation for 4.096V full-scale and MI reset configuration aligns with system initialization needs. Cross-reference the DFN-14 footprint dimensions against PCB layout guidelines.

Selection Notes

Select this part when eight low-cost, moderate-resolution channels are required with integrated precision references. The H-grade internal reference sets the full-scale output to 4.096V, requiring a minimum supply voltage of 4.5V. Choose the MI suffix if mid-scale initialization is preferred over zero-scale. Verify that the 14-lead DFN package fits the available board space compared to the 16-lead MSOP option.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 12-bit variants. The family shares identical pinouts and control logic but differs in resolution, linearity specifications, and internal reference voltages. The DE package denotes the 14-lead DFN form factor, distinct from the MSOP package which offers additional hardware control pins.

Replacement Considerations

Direct replacements within the same family include LTC2636CDE-LMI8#PBF for 2.5V full-scale or LTC2636CDE-HMX8#PBF for external reference operation. Higher resolution options like LTC2636CDE-HMI10#PBF or LTC2636CDE-HMI12#PBF offer improved linearity while maintaining pin compatibility.