LTC2636CMS-LZ10#PBF

Overview

The LTC2636CMS-LZ10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated high-accuracy 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 a rail-to-rail output buffer guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz. This specific variant incorporates a power-on reset circuit that initializes all DAC outputs to zero-scale upon power-up.

Feature Summary

• Octal architecture with 8 independent 10-bit DAC channels in a 14-lead DFN package
• Integrated 10ppm/°C reference yielding a 2.5V full-scale output
• Power-on reset function forces outputs to zero-scale for consistent system initialization
• Ultralow DAC-to-DAC crosstalk specification of less than 2.4nV•s

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable instrumentation
• Optical networking devices

Procurement Notes

Verify the component matches the exact suffix #PBF for lead-free compliance and standard tube packaging. Confirm the 'L' designation indicates the 2.5V internal reference configuration and 'Z' confirms the zero-scale power-on reset behavior. Ensure the MSOP or DFN package type aligns with the design schematic, as pinouts differ between packages.

Selection Notes

Select this part when eight simultaneous low-cost analog outputs are required within a compact footprint. The zero-scale power-on reset is critical for applications where downstream circuits must remain inactive during startup. Verify that the 2.5V full-scale range meets the input requirements of subsequent stages without requiring external attenuation.

Part Context

This component belongs to the LTC2636 family, which offers variations in resolution (8, 10, or 12 bits), package type (DFN or MSOP), and power-on reset behavior. The CMS suffix denotes the 16-lead MSOP package, while the LZ10 suffix specifies the 10-bit resolution, 2.5V internal reference, and zero-scale reset option.

Replacement Considerations

Direct replacements include other LTC2636 variants with matching resolution and reset characteristics, such as the LTC2636CDE-LZ10#PBF if a DFN package is acceptable. Cross-family alternatives like the LTC2637 offer I2C interfaces but require interface adaptation.