LTC2637HDE-HMI12#TRPBF

Overview

The LTC2637HDE-HMI12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output with 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. Each DAC channel includes a rail-to-rail output buffer guaranteed monotonic over the –40°C to 125°C automotive temperature range. The part incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with eight independent 12-bit voltage-output DACs
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail output buffers guaranteed monotonic from –40°C to 125°C
• Power-on reset defaults to mid-scale in internal reference mode

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel precision
• Automotive electronic control units
• Optical networking infrastructure

Procurement Notes

Verify the H-grade designation confirms the –40°C to 125°C operating range and 4.5V minimum supply requirement. Confirm the DE suffix indicates the 14-lead DFN package and the TRPBF suffix specifies tape and reel packaging. Ensure the MI power-on reset configuration matches system startup requirements for mid-scale initialization.

Selection Notes

Select this part when eight isolated channels are required within a compact footprint. The H-grade variant is necessary for automotive or high-temperature environments exceeding 85°C. Verify that the 4.5V minimum supply voltage aligns with the system power rails, as the L-grade variant supports lower voltages down to 2.7V.

Part Context

This component belongs to the LTC2637 family of octal DACs. The specific ordering code defines the performance grade (H), package type (DE), resolution (12-bit), and power-on behavior (MI). Other variants in the series include different resolutions (8-bit, 10-bit), temperature grades (C, I), and reset configurations (Z, MX).

Replacement Considerations

Direct substitutes within the same family include LTC2637HDE-LZ12#TRPBF for zero-scale reset or LTC2637HDE-MX12#TRPBF for external reference reset. Cross-package equivalents like the MSOP version require pinout verification.