LTC2637CDE-HMI8#PBF

Overview

The LTC2637CDE-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features a commercial temperature grade (0°C to 70°C) and utilizes a 14-lead DFN package. The device incorporates double-buffered data latches and operates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes a power-on reset circuit configured to reset outputs to mid-scale in internal reference mode upon power-up.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated precision reference providing 2.5V full-scale output
• Rail-to-rail buffered outputs guaranteed monotonic over operating range
• Power-on reset function set to mid-scale for internal reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix HMI, which designates the power-on reset behavior to mid-scale in internal reference mode. Confirm the DE package designation corresponds to the 14-lead DFN form factor. Ensure the C temperature grade meets the application's thermal requirements of 0°C to 70°C. Cross-reference the datasheet revision to confirm electrical characteristics match the production batch.

Selection Notes

Select this part when eight low-resolution voltage outputs are required in a compact footprint. The 8-bit resolution offers a balance between cost and performance for applications not requiring high precision. The internal 2.5V reference simplifies design by eliminating external reference components. Verify that the I2C address configuration pins (CA0, CA1, CA2) allow for the necessary bus addressing in the system topology.

Part Context

This component belongs to the LTC2637 family, which also includes 10-bit and 12-bit variants. The 'L' suffix indicates the 2.5V full-scale version, while 'H' denotes the 4.096V version. The 'I' and 'H' temperature grades extend the operating range to -40°C to 85°C and -40°C to 125°C, respectively. The MSOP package option provides a 16-lead alternative for designs requiring additional address pins or different thermal profiles.

Replacement Considerations

Direct substitutes within the same family include LTC2637CDE-LZ8#PBF (zero-scale reset) or LTC2637CDE-MI8#PBF if available. For higher resolution needs, consider the 10-bit LTC2637CDE-LMI10#PBF or 12-bit LTC2637CDE-LMI12#PBF. Industrial grade equivalents are the LTC2637IDE series.