LTC2637CDE-HMX8#TRPBF

Overview

The LTC2637CDE-HMX8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features eight independent channels with rail-to-rail output buffers and double-buffered data latches. The device operates on a single 2.7V to 5.5V supply and utilizes an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The part is housed in a 14-lead DFN package and is specified for commercial operation between 0°C and 70°C.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Precision Reference: Includes a 10ppm/°C internal reference yielding a 2.5V full-scale output; supports external reference input.
• Low Power Consumption: Draws approximately 100µA per DAC at 3V supply voltage.
• Ultralow Crosstalk: Features less than 3nV•s crosstalk between DAC channels.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the C-grade designation aligns with the required commercial temperature range of 0°C to 70°C. Ensure the HMX power-on reset configuration matches system requirements for mid-scale initialization in external reference mode.

Selection Notes

Select this component when multiple low-resolution voltage outputs are required within a compact footprint. The 14-lead DFN package suits space-constrained designs. Verify that the 2.7V to 5.5V supply range accommodates the system voltage rails. Consider the HMX suffix if mid-scale reset upon power-up is necessary for external reference applications.

Part Context

This part belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions in both DFN and MSOP packages. The 'L' variant provides a 2.5V full-scale output, while the 'H' variant offers 4.096V. The 'C' grade denotes commercial temperature performance, distinct from the industrial and automotive grades available in the series.

Replacement Considerations

Direct substitutes within the same family include LTC2637CDE-LZ8#TRPBF or LTC2637CDE-MI8#TRPBF, differing primarily in power-on reset behavior and reference mode handling. Higher resolution variants such as the LTC2637CDE-LZ10#TRPBF or LTC2637CDE-LZ12#TRPBF offer increased bit depth but maintain pin compatibility.