LTC2636IMS-HMI8#PBF

Overview

The LTC2636IMS-HMI8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and an integrated precision reference with a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 4.5V to 5.5V, providing a full-scale output of 4.096V. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. This specific variant includes power-on reset functionality that sets outputs to mid-scale in internal reference mode upon initialization.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over the operating range
• Power-on reset to mid-scale in internal reference mode

Applications

• Process control and industrial automation systems
• Portable equipment requiring low power consumption
• Automotive electronic applications
• Optical networking infrastructure

Procurement Notes

Verify the package type matches the design requirements, as this component is available in both 14-lead DFN and 16-lead MSOP configurations. Confirm the ordering suffix corresponds to the desired resolution, reset behavior, and temperature grade before procurement. Ensure the supply voltage constraints for the H-grade part are met during system design.

Selection Notes

Select this part when eight isolated analog outputs are required within a compact footprint. The H-grade designation indicates operation from 4.5V to 5.5V with a 4.096V full-scale range. Choose the IMS suffix for the 16-lead MSOP package if board space allows for larger packages or if exposed pad soldering is not feasible compared to the DFN option.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants exist with different full-scale voltages (2.5V or 4.096V) and reset behaviors (zero-scale or mid-scale). The IMS-HMI8#PBF specifically denotes the industrial temperature grade, MSOP package, mid-scale reset, and 8-bit resolution.

Replacement Considerations

Direct substitutes include other parts within the LTC2636 family such as the LTC2636IMS-HMX8#PBF for external reference operation or LTC2636IMS-LMI8#PBF for lower voltage operation. Cross-family replacements like the LTC2637 offer I2C interfaces instead of SPI.