LTC2637CDE-LMI12#TRPBF

Overview

The LTC2637CDE-LMI12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches and a power-on reset circuit configured to reset outputs to mid-scale in internal reference mode. The component is housed in a 14-lead DFN package and is rated for commercial operation between 0°C and 70°C.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over the operating range
• Ultralow DAC-to-DAC crosstalk specified at less than 3nV•s

Applications

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

Procurement Notes

Verify that the C-grade designation confirms the 0°C to 70°C commercial temperature range requirement. Ensure the LMI12 suffix matches the need for a 2.5V full-scale output with mid-scale power-on reset behavior. Confirm the DE package type corresponds to the 14-lead DFN footprint and the TRPBF suffix indicates tape and reel packaging.

Selection Notes

Select this part when eight isolated voltage outputs are required within a compact space. The 12-bit resolution provides high accuracy suitable for instrumentation. The low power consumption of 100µA per DAC at 3V makes it appropriate for portable applications. Verify that the I²C address configuration via CA0-CAn pins fits the system bus topology.

Part Context

This component belongs to the LTC2637 family, which offers variations in resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and temperature grades (Commercial, Industrial, Automotive). The specific ordering code defines the package style, reset state, and reference configuration unique to this variant.

Replacement Considerations

Direct substitutes include other members of the LTC2637 family such as the LTC2637IDE-LMI12#TRPBF for industrial temperature ranges or the LTC2637CMS-LMI12#TRPBF for MSOP packages. Cross-model compatibility requires verifying pinout alignment and electrical parameter tolerances.