LTC2634CMSE-LZ8#PBF

Overview

The LTC2634CMSE-LZ8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 10-lead MSOP package. 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 supply ranging from 2.7V to 5.5V and communicates via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Key specifications include a settling time of 3.3µs, guaranteed monotonicity over the commercial temperature range of 0°C to 70°C, and power-on reset to zero-scale.

Feature Summary

• Quad 8-bit DAC architecture with rail-to-rail output buffers
• Integrated 2.5V full-scale reference with ±10ppm/°C drift
• Power-on reset configured to zero-scale for safe initialization
• Ultralow crosstalk between channels (2.4nV•s typical)

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and MSE denotes the 10-lead MSOP package. Confirm the LZ designation ensures zero-scale power-on reset behavior. Ensure the C grade matches the required 0°C to 70°C operating environment. Cross-reference the datasheet revision E for accurate timing parameters.

Selection Notes

Select this part when four independent 8-bit outputs are required in a compact surface-mount footprint. The internal 2.5V reference eliminates external component count compared to external reference variants. Choose this model over the H-grade if operation below 4.5V is necessary, as the H-grade requires a minimum of 4.5V supply voltage.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions. The CMSE variant specifically utilizes the 10-lead MSOP package, distinct from the 16-lead QFN (UD) package available in the same family. The LZ suffix differentiates it from MI (mid-scale internal) and MX (mid-scale external) reset options.

Replacement Considerations

Direct pin-compatible replacements within the same package require matching the resolution, reset behavior, and reference type. Variants such as LTC2634CMSE-LZ10 or LTC2634CMSE-LZ12 offer higher resolution but maintain the same physical footprint and zero-scale reset configuration.