LTC2634HMSE-LMX8#PBF

Overview

The LTC2634HMSE-LMX8#PBF is a quad 8-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference with a full-scale output of 4.096V, requiring a supply voltage between 4.5V and 5.5V. The device includes rail-to-rail output buffers and guarantees monotonicity over the -40°C to 125°C temperature range. Communication occurs via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 4.096V precision reference
• Rail-to-rail output buffers guaranteed monotonic from -40°C to 125°C
• 3-wire SPI/MICROWIRE serial interface operating at 50MHz
• Power-on reset to mid-scale in external reference mode

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS requirements. Confirm the MSE package designation corresponds to the 10-lead MSOP form factor. Ensure the H-grade temperature rating matches the intended operational environment of -40°C to 125°C. Check for any automotive-specific reliability reports if required by application standards.

Selection Notes

Select this part when a quad 8-bit resolution is sufficient for the application. The H-suffix denotes a 4.096V full-scale output, necessitating a 4.5V to 5.5V supply. The LMX suffix specifies power-on reset behavior to mid-scale using an external reference. Compare settling time specifications against system speed requirements, noting typical values around 3.3µs to 3.8µs depending on supply voltage.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The HMSE variant specifically utilizes the MSOP footprint and H-grade temperature range. Other family members include the LTC2635 (I2C interface) and LTC2636 (octal configuration).

Replacement Considerations

Direct pin-compatible replacements within the same package and resolution include other LTC2634 variants with different reset behaviors or reference voltages. Cross-family alternatives like the LTC2635 offer I2C compatibility but differ in interface protocol.