LTC2634IMSE-LZ12#PBF

Overview

The LTC2634IMSE-LZ12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates from a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the -40°C to 85°C industrial temperature range. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum integral nonlinearity error
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to zero-scale for consistent system initialization

Applications

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

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm compliance with automotive reliability standards if the application requires AEC-Q100 qualification, as standard versions may differ from qualified variants. Ensure the lead-free designation matches environmental requirements.

Selection Notes

Select this part when four independent 12-bit channels are required in a compact MSOP footprint. The LZ suffix indicates a zero-scale power-on reset, suitable for applications where downstream circuits must remain inactive during startup. Choose the IMSE suffix for industrial temperature operation (-40°C to 85°C). Verify that the 2.5V internal reference range meets the system's output voltage requirements.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also offers 10-bit and 8-bit resolutions. Variants exist in 16-lead QFN packages and with different power-on reset behaviors (mid-scale or external reference modes). The IMSE-LZ12 configuration specifically targets industrial applications requiring precise zero-scale initialization.

Replacement Considerations

Direct replacements within the same family include LTC2634IMSE-HZ12#PBF for 4.096V full-scale output or LTC2634IMSE-MI12#PBF for mid-scale reset. For pin-compatible alternatives with different reset behaviors, consider the MI or MX suffix variants.