LTC2636CDE-LZ12#TRPBF

Overview

The LTC2636CDE-LZ12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and communicates via a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches and a power-on reset circuit that clears outputs to zero-scale upon initialization. The component is housed in a 14-lead 4mm × 3mm DFN package.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 10ppm/°C precision reference for 2.5V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel packaging configuration containing 2500 pieces. Confirm the lead-free designator matches project requirements. Ensure the commercial temperature grade (C) aligns with the operational environment constraints of 0°C to 70°C. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm availability status.

Selection Notes

Select this part when eight isolated 12-bit voltage outputs are required within a compact footprint. The LZ suffix ensures outputs initialize to zero-scale, which is critical for safety or downstream circuit protection during power-up. Choose the DE package for space-constrained designs requiring a 14-lead DFN form factor. Verify that the 2.7V to 5.5V supply range fits the system power architecture.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 8-bit resolutions. Variants exist with mid-scale reset options (MI/MX suffixes) or higher voltage references (H suffix). The CDE designation specifically denotes the commercial temperature grade and 14-lead DFN package type, distinguishing it from industrial or automotive grades.

Replacement Considerations

Direct substitutes include other LTC2636 variants with different resolutions or reset behaviors, such as LTC2636CDE-LMI12#TRPBF for mid-scale reset. For single-channel applications, the LTC2630 series may be considered if pin compatibility allows.