LTC2636HDE-LMI12#TRPBF

Overview

The LTC2636HDE-LMI12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated high-accuracy reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches, power-on reset to mid-scale in internal reference mode, and rail-to-rail output buffers guaranteed monotonic over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with maximum integral nonlinearity error of ±2.5LSB.
• Integrated Precision Reference: Features an internal 10ppm/°C reference yielding a 4.096V full-scale output.
• Automotive Temperature Grade: Operates reliably within the extended temperature range of –40°C to 125°C.
• SPI Interface: Communicates via a 3-wire serial interface supporting clock rates up to 50MHz.

Applications

• Automotive systems requiring multi-channel precision control
• Process control and industrial automation equipment
• Automatic test equipment
• Optical networking infrastructure

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation matches the required automotive temperature range and 4.5V to 5.5V supply voltage constraints for the target application environment.

Selection Notes

Select this part when eight independent 12-bit outputs are required with a fixed 4.096V full-scale range. Ensure the system supply voltage remains between 4.5V and 5.5V. Choose this model over L-grade variants if operation above 85°C is necessary or if automotive qualification is mandated.

Part Context

This component belongs to the LTC2636 family of octal DACs. The DE suffix denotes the 14-lead DFN package, while H specifies the automotive temperature grade. The MI12 suffix indicates 12-bit resolution with power-on reset to mid-scale in internal reference mode.

Replacement Considerations

Direct replacements within the same family include LTC2636HDE-HZ12#TRPBF for zero-scale reset or LTC2636HDE-LMI12#TRPBF for lower voltage operation. Cross-family substitutes like the LTC2637 offer I2C interfaces but require pinout and software adaptation.

FAQ

["What is the power-on reset behavior?","The LTC2636HDE-LMI12 resets all DAC outputs to mid-scale upon power-up when operating in internal reference mode."]

["What is the minimum supply voltage?","The device requires a supply voltage between 4.5V and 5.5V to maintain specified performance characteristics."]

["How is crosstalk managed between channels?","The DACs feature ultralow crosstalk, typically less than 2.4nV•s, ensuring minimal interference when adjacent channels switch states."]