LTC2637CMS-LZ12#PBF

Overview

The LTC2637CMS-LZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates double-buffered data latches and a power-on reset circuit configured to reset to zero-scale in internal reference mode.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail buffered outputs
• Integrated 2.5V precision reference with ±10ppm/°C drift
• I2C-compatible serial interface with selectable slave addresses
• Power-on reset to zero-scale in internal reference mode

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 specific ordering suffix 'LZ' confirms the zero-scale power-on reset behavior for internal reference applications. Confirm the 'MS' package designation matches the required 16-lead MSOP footprint. Ensure the 'C' grade meets the commercial temperature range requirements of the target design environment.

Selection Notes

Select this part when eight independent 12-bit channels are required within a compact surface-mount package. The integrated 2.5V reference eliminates external component count compared to external reference variants. Verify that the 2.7V to 5.5V supply range aligns with the system power rails, as the H-grade variant requires a minimum of 4.5V.

Part Context

This component belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit resolutions. Variants exist with different full-scale voltages (2.5V or 4.096V), power-on reset behaviors (zero-scale or mid-scale), and temperature grades (Commercial, Industrial, Automotive). The CMS package denotes the 16-lead MSOP form factor.

Replacement Considerations

Direct functional equivalents within the same family include LTC2637IMS-LZ12#PBF (Industrial grade) or LTC2637HMS-LZ12#PBF (Automotive grade). For pin-compatible alternatives with different reset behaviors, consider the LMI or LMX suffix variants.