LTC2637CMS-LMI10#PBF

Overview

The LTC2637CMS-LMI10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Upon power-up, the internal data latches reset to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 10-bit resolution and integrated 2.5V precision reference
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C-compatible serial interface with selectable addresses via CA0-CA2 pins
• Power-on reset configured for mid-scale output initialization

Applications

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

Procurement Notes

Verify the package type matches the design requirements; this specific part number utilizes the 16-lead MSOP package. Confirm that the operating environment remains within the commercial temperature range of 0°C to 70°C, as higher grades are required for extended ranges. Ensure the I2C bus pull-up resistors are correctly sized for the desired clock speed, up to 400kHz. Check that the supply voltage stays between 2.7V and 5.5V to maintain specified performance levels.

Selection Notes

Select this component when eight independent voltage outputs are required in a compact form factor. The 10-bit resolution offers a balance between cost and accuracy, suitable for general-purpose analog control. The integrated 2.5V reference simplifies board layout by eliminating external reference components. Consider the H-grade variant if operation above 70°C or at higher supply voltages (4.5V–5.5V) with a 4.096V full-scale output is necessary.

Part Context

This part belongs to the LTC2637 family, which also includes 8-bit and 12-bit variants. The 'L' suffix indicates the 2.5V full-scale internal reference configuration, while 'H' denotes the 4.096V version. The 'MS' suffix specifies the 16-lead MSOP package, distinct from the 14-lead DFN option. The 'C' grade limits operation to commercial temperatures, whereas 'I' and 'H' grades support industrial and automotive ranges respectively.

Replacement Considerations

Direct functional equivalents within the same family include the LTC2637CMS-LZ10#PBF (zero-scale reset) or LTC2637CMS-HMI10#PBF (4.096V reference). For different resolutions, the LTC2637CMS-LMI8#PBF and LTC2637CMS-LMI12#PBF share identical pinouts and interfaces. Verify that any substitute maintains the same package dimensions and thermal characteristics.