LTC2637CMS-LMX12#PBF

Overview

The LTC2637CMS-LMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter from Analog Devices Inc. It features a 16-lead MSOP package and operates within a supply voltage range of 4.5V to 5.5V. The device incorporates an internal precision reference yielding a full-scale output of 4.096V with a temperature coefficient of 10ppm/°C. Communication is handled via 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 5µs at ±1LSB, and rail-to-rail buffered outputs guaranteed monotonic over the operating temperature range.

Feature Summary

• Octal architecture providing eight independent 12-bit DAC channels in a single component
• Integrated 4.096V precision reference with 10ppm/°C drift for high accuracy
• I2C-compatible serial interface with selectable slave addresses via CA0, CA1, and CA2 pins
• Power-on reset circuit configured to initialize outputs to mid-scale in external reference mode

Applications

• Mobile communications systems requiring multi-channel signal generation
• Process control and industrial automation instrumentation
• Automatic test equipment utilizing precise voltage references
• Portable battery-powered equipment needing low power consumption
• Automotive electronic control units
• Optical networking transceivers

Procurement Notes

Verify that the specific suffix LMX12 corresponds to the intended power-on reset behavior and resolution configuration before finalizing procurement. Confirm package availability in the 16-lead MSOP format as required by the PCB layout. Ensure the design supports the 4.5V to 5.5V supply voltage range mandated by the H-grade internal reference operation.

Selection Notes

Select this part when eight isolated 12-bit voltage outputs are required with minimal inter-channel crosstalk. The LMX suffix indicates a mid-scale reset state suitable for external reference applications where a defined initial voltage is preferred over zero-scale. Consider the 16-lead MSOP package dimensions if space constraints preclude the use of the smaller DFN footprint.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes variants with 10-bit and 8-bit resolutions. The family shares common architectural features such as the I2C interface and rail-to-rail output buffers. Variations exist between the L-series (2.5V FS, 2.7V–5.5V supply) and H-series (4.096V FS, 4.5V–5.5V supply), with this specific model representing the high-voltage, high-resolution option.

Replacement Considerations

Direct functional substitutes within the same package and pinout may include other members of the LTC2637 family, such as the LTC2637IMS-LMX12#PBF or LTC2637IMS-HMX12#PBF, provided the temperature grade and reset configuration match the system requirements.