LTC2637CDE-HMX12#PBF

Overview

The LTC2637CDE-HMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. 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 communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches, rail-to-rail output buffers, and a power-on reset circuit configured to reset to mid-scale in external reference mode. The component is housed in a 14-lead DFN package and is rated for commercial temperature operation between 0°C and 70°C.

Feature Summary

• Octal 12-bit resolution with maximum INL error of ±2.5 LSB
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Power-on reset to mid-scale in external reference mode
• Ultralow DAC-to-DAC crosstalk (<3nV•s)

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix HMX, which designates the power-on reset behavior as resetting to mid-scale when using an external reference. Confirm the C grade indicates a commercial temperature range of 0°C to 70°C. Ensure the DE package type corresponds to the 14-lead DFN form factor required for the target PCB layout.

Selection Notes

Select this part if an octal DAC configuration is required with 12-bit accuracy and I2C connectivity. The H-grade internal reference necessitates a supply voltage between 4.5V and 5.5V. For applications requiring zero-scale reset or different supply ranges, consider the LZ or L-series variants respectively. Verify that the 14-lead DFN package fits the available footprint.

Part Context

This component belongs to the LTC2637 family of octal voltage-output DACs. The family offers variations in resolution (8, 10, or 12 bits), package types (DFN or MSOP), and temperature grades (C, I, or H). The CDE-HMX12 variant specifically combines the commercial temperature grade, DFN package, external reference mid-scale reset, and 12-bit resolution.

Replacement Considerations

Direct functional equivalents within the same family include other LTC2637 variants with different resolutions or reset behaviors. Cross-family replacements are not explicitly documented in the provided datasheet.