LTC2637CMS-LZ8#TRPBF

Overview

The LTC2637CMS-LZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical characteristics include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a settling time of 3.9µs at ±1 LSB for 8-bit resolution, and rail-to-rail output buffers. The part is guaranteed monotonic over the commercial temperature range of 0°C to 70°C.

Feature Summary

• Octal 8-bit DAC architecture with rail-to-rail output buffers
• Integrated 2.5V precision reference with 10ppm/°C drift
• I2C-compatible serial interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset circuit configurable to zero-scale or mid-scale

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 #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the 'C' grade designation aligns with the required commercial operating temperature range of 0°C to 70°C. Ensure the 'L' suffix corresponds to the 2.5V full-scale internal reference requirement. Cross-check the 'Z' power-on reset setting against system initialization needs.

Selection Notes

Select this component when an octal DAC configuration is required within a compact footprint. The 8-bit resolution suits applications where cost and speed are prioritized over high precision. The 2.5V internal reference simplifies design by eliminating external reference components. Verify that the I2C bus speed requirements do not exceed 400kHz and that the supply voltage remains within the 2.7V to 5.5V range for specified performance.

Part Context

This part belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions in both DFN and MSOP packages. The CMS variant specifically denotes the 16-lead MSOP package with commercial temperature grading. Other variants in the family include higher resolution options like the LTC2637CMS-LZ12 or different temperature grades such as the Industrial (I) and Automotive (H) versions.

Replacement Considerations

Direct pin-for-pin replacements within the same package and resolution include other LTC2637CMS-LZ8 variants with different power-on reset settings (e.g., LTC2637CMS-LMI8#TRPBF). For different resolutions, ensure INL and settling time specifications meet the application requirements.