LTC2637HMS-LZ12#TRPBF

Overview

The LTC2637HMS-LZ12#TRPBF is an octal 12-bit voltage-output DAC family member from Analog Devices, housed in a 16-lead MSOP package. It features an integrated precision reference providing a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device communicates 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 ±2.5 LSB, low noise performance of 0.75mVP-P (0.1Hz to 200kHz), and rail-to-rail buffered outputs guaranteed monotonic over the –40°C to 125°C temperature range.

Feature Summary

• Octal architecture with 8 independent 12-bit channels in a compact 16-lead MSOP package
• Integrated 10ppm/°C precision reference yielding a 4.096V full-scale output
• I2C-compatible serial interface with selectable internal or external reference modes
• Power-on reset circuit configured to initialize outputs to zero-scale

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable battery-powered instrumentation
• Optical networking components

Procurement Notes

Verify that the H-grade suffix corresponds to the automotive temperature range of –40°C to 125°C and the 4.5V minimum supply requirement. Confirm the LZ12 designation ensures the 12-bit resolution and zero-scale power-on reset behavior. Ensure the TRPBF suffix matches the required tape and reel packaging quantity for the production line.

Selection Notes

Select this part when eight isolated voltage outputs are required within a small footprint. The H-grade variant is necessary for applications demanding operation above 85°C or those adhering to automotive environmental standards. Verify that the system supply voltage remains within the 4.5V to 5.5V window to support the 4.096V internal reference configuration.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions in both DFN and MSOP packages. The H-grade specifically denotes the extended temperature capability and higher voltage reference compared to the L-grade parts. The MSOP package provides a 16-lead form factor suitable for dense PCB layouts where through-hole or larger surface-mount options are impractical.

Replacement Considerations

Direct replacements within the same family include other LTC2637 variants differing only in resolution (LTC2637HMS-LZ10#TRPBF, LTC2637HMS-LZ8#TRPBF) or package type (LTC2637HDE-LZ12#TRPBF). Cross-family substitution requires verifying pin compatibility and interface protocols.