LTC2636IMS-LMX12#PBF

Overview

The LTC2636IMS-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 when operating in internal reference mode. 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 power-on reset functionality that sets outputs to mid-scale in external reference mode. The component is housed in a 16-lead MSOP package.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 10ppm/°C precision reference for 2.5V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• Power-on reset to mid-scale in external reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix LMX12#PBF against the manufacturer's current documentation to confirm lead-free status and tape-and-reel packaging specifications. Ensure compatibility with the required power-on reset behavior for mid-scale initialization in external reference mode before finalizing procurement.

Selection Notes

Select this part for designs requiring multiple low-drift voltage outputs with precise mid-scale initialization upon power-up. The 12-bit resolution and 2.5V full-scale range are suitable for applications demanding high accuracy within a single-supply voltage environment. Consider the MSOP package dimensions if board space is constrained.

Part Context

This component belongs to the LTC2636 family of octal DACs, which offers various combinations of resolution, reset modes, and full-scale voltages. The IMS designation indicates the Industrial temperature grade (-40°C to 85°C), while the L suffix specifies the 2.5V internal reference configuration. The MX suffix defines the mid-scale reset behavior in external reference mode.

Replacement Considerations

Direct substitutes within the same family include LTC2636IMS-LMI12#PBF (internal reference reset) or LTC2636IMS-HMX12#PBF (4.096V full-scale). Verify pinout compatibility and thermal characteristics when replacing with different package types or temperature grades.