LTC2634CMSE-HZ8#PBF

Overview

The LTC2634CMSE-HZ8#PBF is a quad 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 operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface for communication. It includes double-buffered data latches, ultralow crosstalk between DACs, and a power-on reset circuit that defaults outputs to zero-scale. The component is housed in a 10-lead MSOP package and is guaranteed monotonic over the commercial temperature range of 0°C to 70°C.

Feature Summary

• Quad 8-bit resolution with rail-to-rail output buffers
• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• Power-on reset to zero-scale for consistent system initialization
• Ultralow DAC-to-DAC crosstalk of 2.4nV•s typical

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix #PBF confirms lead-free compliance and RoHS standards. Confirm the MSE package designation matches the required 10-lead MSOP footprint. Ensure the C grade temperature rating aligns with the operational environment requirements. Check for any automotive-specific variants if AEC-Q100 qualification is necessary for the target application.

Selection Notes

Select this part when four independent 8-bit channels are required with low power consumption. The internal 2.5V reference simplifies design by eliminating external components. Choose the H-grade variant if operation above 70°C or higher voltage rails are needed. Verify that the 3-wire serial interface timing meets the system clock constraints.

Part Context

This component belongs to the LTC2634 family, which offers various resolutions (8, 10, 12 bits) and package options (QFN, MSOP). The CMSE suffix indicates the Commercial temperature grade and MSOP package. Other family members include the LTC2635 (I2C interface) and LTC2636 (Octal configuration), sharing similar architectural features but differing in interface and channel count.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2634 variants with different resolutions or reset behaviors, such as LTC2634CMSE-LZ8#PBF. For interface changes, consider the LTC2635 series for I2C compatibility. Cross-referencing requires verifying pinout compatibility and electrical parameter alignment.