LTC2634CMSE-LZ10#PBF

Overview

The LTC2634CMSE-LZ10#PBF is a quad 10-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 operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the temperature range, and low noise characteristics. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. This specific variant utilizes a 10-lead MSOP package and incorporates a power-on reset circuit that defaults outputs to zero-scale.

Feature Summary

• Quad 10-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with 2.5V full-scale voltage
• 3-wire SPI/MICROWIRE serial interface operating up to 50MHz
• Power-on reset to zero-scale in internal reference mode
• Guaranteed monotonic operation from -40°C to 125°C

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive applications

Procurement Notes

Verify the component matches the specified 10-lead MSOP package and the LZ10 suffix configuration for zero-scale reset and 2.5V full-scale output. Confirm the C-grade commercial temperature rating aligns with system requirements. Ensure ordering documentation specifies the #PBF lead-free designation. Cross-reference the manufacturer's latest datasheet revision for any pinout or electrical characteristic updates before finalizing procurement.

Selection Notes

Select this part when a quad channel DAC with a fixed 2.5V internal reference is required. The LZ suffix ensures outputs initialize to zero upon power-up, which is critical for safety in certain analog circuits. The MSE package offers a compact footprint compared to the QFN option. Verify that the 2.7V minimum supply voltage meets the system's power budget, as the H-grade variants require higher voltages for their 4.096V reference.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also includes 8-bit and 12-bit resolutions. Variants are available with different full-scale voltages (L for 2.5V, H for 4.096V) and reset behaviors (MI, MX, Z). The CMSE designation specifically identifies the Commercial grade temperature range and the 10-lead MSOP physical package form factor within this product line.

Replacement Considerations

Direct replacements include other LTC2634 variants with matching resolution and package, such as LTC2634CMSE-LZ12#PBF for 12-bit resolution. For external reference applications, consider the LMX series. Ensure any substitute maintains the 3-wire SPI compatibility and similar settling time specifications.