LTC2637HMS-LMX12#TRPBF

Overview

The LTC2637HMS-LMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a 10ppm/°C temperature coefficient, providing a full-scale output of 4.096V. 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. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 5µs at ±1LSB, and ultralow DAC-to-DAC crosstalk of less than 3nV•s. The part is housed in a 16-lead MSOP package and includes double-buffered data latches.

Feature Summary

• Octal 12-bit resolution with rail-to-rail buffered outputs
• Integrated 4.096V precision reference with 10ppm/°C drift
• I2C interface with selectable power-on reset to mid-scale for external reference mode
• Ultralow crosstalk (<3nV•s) and guaranteed monotonicity over -40°C to 125°C

Applications

• Process control and industrial automation systems
• Automatic test equipment
• Portable battery-powered instrumentation
• Automotive electronic modules

Procurement Notes

Verify the specific ordering suffix LMX12#TRPBF against the manufacturer's current documentation to confirm the tape and reel quantity and lead finish. Ensure the design supports the 4.5V minimum supply requirement for the H-grade variant. Confirm that the I2C bus pull-up resistors are correctly sized for the 400kHz fast mode operation specified in the datasheet.

Selection Notes

Select this part when eight independent 12-bit voltage channels are required in a compact surface-mount package. The H-grade designation indicates suitability for automotive applications requiring operation up to 125°C. Choose the LMX suffix if the system requires the DAC outputs to initialize to mid-scale codes upon power-up when using an external reference voltage source.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The H-grade variants are distinguished by their higher full-scale output voltage of 4.096V and a wider operating supply range starting at 4.5V, compared to the 2.5V output and 2.7V start of the L-grade parts.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2637HMI12#TRPBF (internal reference reset) and LTC2637HZ12#TRPBF (zero-scale reset). For different resolutions or package types, consider LTC2637HDE-HZ12#TRPBF (DFN package) or lower-resolution variants like LTC2637HMX10#TRPBF.