LTC2637HMS-LZ8#PBF

Overview

The LTC2637HMS-LZ8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal 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 includes rail-to-rail output buffers that are guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated precision reference yielding 2.5V full-scale output with ±10ppm/°C drift
• Rail-to-rail output buffers guaranteed monotonic from –40°C to 125°C
• I²C interface with selectable slave addresses via CA0–CA2 pins

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 suffix configuration against the manufacturer's ordering guide to ensure correct package type, temperature grade, and power-on reset behavior. Confirm that the MSOP-16 package variant matches the intended PCB footprint and thermal requirements for the target application environment.

Selection Notes

Select this component when multiple low-channel-count DACs are required in a compact form factor. The integrated reference eliminates external components, reducing board space. Ensure the supply voltage remains within the 2.7V to 5.5V range for the LTC2637-L variant. Consider the ultralow crosstalk specification if adjacent channels switch simultaneously.

Part Context

This part belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolutions. Variants include the LTC2637-H series for 4.096V full-scale outputs requiring 4.5V to 5.5V supplies. Package options include 14-lead DFN and 16-lead MSOP. Temperature grades range from commercial (C) to automotive (H).

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2637HMS-LZ10#PBF (10-bit) and LTC2637HMS-LZ12#PBF (12-bit), offering higher resolution with identical interfaces and packages.