LTC2636HDE-HMI8#PBF

Overview

The LTC2636HDE-HMI8#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 operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and double-buffered data latches. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels with rail-to-rail output buffers.
• Integrated Precision Reference: Internal 4.096V full-scale reference with ±10ppm/°C drift.
• Automotive Grade: Guaranteed monotonic operation from –40°C to 125°C.
• Hardware Control: MSOP package includes dedicated CLR and LDAC pins for asynchronous updates and clearing.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment

Procurement Notes

Verify the specific ordering suffix HDE-HMI8#PBF against the manufacturer's current product selection guide. Confirm that the DE package designation corresponds to the 14-lead DFN form factor and that the H-grade specification meets the required 4.5V to 5.5V supply constraints for the 4.096V full-scale output.

Selection Notes

Select this component when eight isolated analog outputs are required within a compact footprint. The H-grade variant is necessary for environments exceeding 85°C. Ensure the system power supply remains within the 4.5V to 5.5V range, as the internal reference sets the full-scale output to 4.096V. Verify that the 14-lead DFN package fits the PCB layout constraints.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants exist with 2.5V full-scale outputs (LTC2636-L) or external reference capabilities (MX suffix). The HDE-HMI8#PBF specifically targets high-reliability applications requiring the widest operating temperature range and hardware control pins available in the DFN package.

Replacement Considerations

Direct pin-compatible substitutes within the same family include other resolution variants like the LTC2636HDE-HMI10#PBF or LTC2636HDE-HMI12#PBF. For different package types, the MSOP version LTC2636HMS-HMI8#PBF offers identical electrical performance but includes additional CLR and LDAC pins.