LTC2637CDE-LMX12#TRPBF

Overview

The LTC2637CDE-LMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 2.5V full-scale internal reference with a 10ppm/°C temperature coefficient and operates on a single 2.7V 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 4.5µs at 3V, and ultralow DAC-to-DAC crosstalk below 3nV•s. It incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale in external reference mode.

Feature Summary

• Octal architecture providing eight independent 12-bit voltage output channels
• Integrated precision 2.5V reference with 10ppm/°C drift specification
• Ultralow inter-channel crosstalk performance (<3nV•s)
• Power-on reset logic set to mid-scale for external reference configurations

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm that the C-grade designation aligns with the required commercial operating temperature range of 0°C to 70°C. Ensure the L-series selection matches the system's 2.7V to 5.5V supply constraints and 2.5V full-scale requirement.

Selection Notes

Select this component when multiple low-drift voltage outputs are required within a compact footprint. The L-series variant is appropriate for systems powered by 2.7V to 5.5V rails requiring a 2.5V output span. The MX suffix dictates the power-on state behavior; choose this option if mid-scale initialization is preferred during external reference operation rather than zero-scale or internal reference states.

Part Context

This part belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The DE package designation identifies the 14-lead plastic DFN form factor. The C temperature grade distinguishes it from the wider operating ranges of the I and H grades available within the same product line.

Replacement Considerations

Direct functional substitutes within the same family include the LTC2637CDE-LMI12#TRPBF, which shares identical electrical characteristics but resets to mid-scale in internal reference mode instead of external reference mode.