LTC2637CMS-HMX12#PBF

Overview

The LTC2637CMS-HMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter from Analog Devices. It features a 4.096V full-scale output with an integrated 10ppm/°C reference and operates on a 4.5V to 5.5V supply. The device utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity error of ±2.5LSB, a settling time of 5µs at ±1LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. It incorporates double-buffered data latches and power-on reset functionality.

Feature Summary

• Octal 12-bit resolution with rail-to-rail buffered outputs
• Integrated 4.096V precision reference with 10ppm/°C drift
• Ultralow crosstalk between channels (<3nV•s)
• I2C interface with selectable internal or external reference

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 suffix configuration against the datasheet ordering guide. The CMS designation indicates a 16-lead MSOP package, C-grade temperature range, H-grade full-scale voltage, MX power-on reset mode, and 12-bit resolution. Confirm that the #PBF suffix denotes lead-free construction compliant with RoHS standards before finalizing procurement.

Selection Notes

Select this component for applications requiring multiple high-precision voltage outputs in a compact footprint. Ensure the system supply voltage remains within the 4.5V to 5.5V range required for the H-grade variant. Verify that the I2C bus speed requirements align with the supported standard and fast modes. Consider the thermal resistance of the MSOP package when calculating power dissipation limits under load.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 8-bit and 10-bit variants. The family shares identical pinouts and core architecture but differs in resolution and internal reference voltage options. The H-grade designation specifically provides a 4.096V full-scale output suitable for higher dynamic range applications compared to the L-grade 2.5V version.

Replacement Considerations

Direct functional equivalents within the same package and specification profile are limited due to the unique combination of octal channels, 12-bit resolution, and specific reference voltage. Review other parts in the LTC2637 series for pin-compatible alternatives if different resolutions or reset behaviors are acceptable.