LTC2636HMS-HMI8#PBF

Overview

The LTC2636HMS-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 4.096V full-scale reference with a temperature coefficient of 10ppm/°C and operates on a single 4.5V to 5.5V supply. The device provides rail-to-rail output buffering, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and double-buffered data latches. Communication occurs via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Octal 8-Bit Resolution: Eight independent DAC channels with 8-bit resolution and ±0.5 LSB DNL.
• Integrated Precision Reference: Internal 4.096V reference with 10ppm/°C drift; supports external reference input.
• Automotive Grade: Guaranteed monotonic operation across –40°C to 125°C temperature range.
• Power-On Reset: Configurable to reset outputs to mid-scale upon power-up.

Applications

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

Procurement Notes

Verify the H-grade specification for the –40°C to 125°C operating range and the MSOP-16 package type. Confirm that the system supply voltage remains within the 4.5V to 5.5V requirement for the H-series variant. Ensure the design accounts for the mid-scale power-on reset behavior inherent to the HMI suffix.

Selection Notes

Select this part when eight low-cost, 8-bit DAC channels are required in a compact surface-mount package. The HMI8 variant is suitable for applications needing a fixed 4.096V full-scale range and mid-scale initialization. For lower voltage operation or different reset behaviors, consider the L-series or Z/MX suffixes respectively.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 12-bit variants. The 'H' indicates the 4.096V internal reference and higher supply voltage range, while 'MS' denotes the 16-lead MSOP package. The 'HMI8' suffix specifically identifies the 8-bit resolution, automotive temperature grade, and mid-scale power-on reset configuration.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2636HMX-HMI8#PBF (external reference mode) or LTC2636HZ-HMI8#PBF (zero-scale reset). Cross-resolution equivalents like LTC2636HMX-HMI10#PBF offer higher precision but retain the same package and interface.