LTC2636IDE-LMX12#PBF

Overview

The LTC2636IDE-LMX12#PBF 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 supporting clock rates up to 50MHz. It includes double-buffered data latches and resets to mid-scale in external reference mode upon power-up. The component is housed in a 14-lead DFN package and guarantees monotonicity over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with maximum integral nonlinearity error of ±2.5 LSB.
• Integrated Precision Reference: Features a low-drift internal reference with a temperature coefficient of ±10ppm/°C for a 2.5V full-scale output.
• SPI Interface: Supports high-speed communication via a 3-wire serial interface with clock rates up to 50MHz.
• Power-On Reset: Configured to reset outputs to mid-scale in external reference mode after power-up.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction and RoHS compliance as per manufacturer standards. Confirm the DE package designation corresponds to the 14-lead DFN form factor required for the design. Ensure the IDE suffix matches the industrial temperature grade (-40°C to 85°C) and LMX12 specifies the 12-bit resolution with mid-scale external reference reset behavior.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required with tight linearity specifications. The LMX12 variant is appropriate if the system requires mid-scale initialization during power-up while using an external reference voltage. Verify that the supply voltage remains within the 2.7V to 5.5V range and that the PCB layout accommodates the 14-lead DFN package with exposed pad grounding.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes variants with different resolutions (8-bit, 10-bit), temperature grades (Commercial, Automotive), and reset configurations (Zero-Scale, Mid-Scale Internal). The IDE-LMX12 specifically denotes the Industrial grade, External reference mid-scale reset, and 12-bit resolution within the 2.5V full-scale sub-family.

Replacement Considerations

Direct replacements within the same family include LTC2636IDE-LMI12#PBF (internal reference reset) or LTC2636IDE-LZ12#PBF (zero-scale reset). For different resolutions, consider LTC2636IDE-LMX10#PBF or LTC2636IDE-LMX8#PBF. Cross-family alternatives like the LTC2637 offer I2C interfaces instead of SPI.