LTC2637CDE-HMI10#PBF

Overview

The LTC2637CDE-HMI10#PBF is an octal, 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the operating range, and double-buffered data latches. The part is housed in a 14-lead DFN package and incorporates a power-on reset circuit configured to reset to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with eight independent 10-bit DAC channels
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C interface with selectable slave addresses via CA0–CA2 pins

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 suffixes against the manufacturer's current documentation to ensure correct package type, temperature grade, and power-on reset configuration. Confirm that the I2C address selection pins are properly terminated in the design to avoid bus conflicts. Check for any recent product change notices regarding lead finish or manufacturing site updates.

Selection Notes

Select this component when multiple low-cost, moderate-resolution voltage outputs are required in a compact footprint. The H-grade variant supports higher supply voltages up to 5.5V compared to the L-grade. Ensure the application does not require external reference buffering beyond the specified capacitive load limits. Verify that the I2C clock speed matches the system controller capabilities.

Part Context

This part belongs to the LTC2637 family, which also offers 8-bit and 12-bit resolutions. Variants exist with different power-on reset behaviors (zero-scale vs. mid-scale) and reference configurations (internal vs. external). The CDE suffix denotes the commercial temperature range and 14-lead DFN package, distinguishing it from industrial or automotive grades and MSOP packages.

Replacement Considerations

Direct functional substitutes within the same family include LTC2637CDE-LMI10#PBF (different reset behavior) or LTC2637IDE-HMI10#PBF (industrial temperature grade). Cross-family SPI-based alternatives like the LTC2636 series require interface modifications.