LTC2636HDE-HMX12#TRPBF

Overview

The LTC2636HDE-HMX12#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 includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 50MHz SPI/MICROWIRE-compatible 3-wire serial interface. This specific variant incorporates power-on reset logic that sets outputs to mid-scale when using an external reference.

Feature Summary

• Octal architecture with 12-bit resolution and 4.096V full-scale output
• Integrated 10ppm/°C reference for high stability
• Automotive grade operation from –40°C to 125°C
• Power-on reset to mid-scale in external reference mode

Applications

• Automotive systems requiring high reliability
• Process control and industrial automation
• Automatic test equipment

Procurement Notes

Verify the H-grade designation confirms the extended –40°C to 125°C operating range required for automotive applications. Ensure the MX suffix aligns with system designs utilizing external references, as this variant resets to mid-scale under those conditions rather than zero-scale or internal reference modes.

Selection Notes

Select this part when an octal DAC configuration is necessary alongside strict temperature requirements up to 125°C. The 4.096V span suits 5V logic systems. Verify if the mid-scale power-on state meets downstream circuit safety needs; otherwise, consider the HZ variant for zero-scale initialization.

Part Context

This component belongs to the LTC2636 family of octal DACs. The 'H' indicates the automotive temperature grade, 'DE' specifies the 14-lead DFN package, and 'MX12' defines the mid-scale external reference reset behavior at 12-bit resolution. It shares core specifications with commercial and industrial grades but offers expanded thermal capability.

Replacement Considerations

LTC2636IDE-HMX12#TRPBF: Identical electrical performance but limited to the industrial temperature range (–40°C to 85°C).

FAQ

What is the power-on reset behavior for this specific part number?

The LTC2636HDE-HMX12#TRPBF resets all DAC outputs to mid-scale upon power-up when operating in external reference mode.

What is the maximum clock rate for the serial interface?

The SPI/MICROWIRE-compatible 3-wire serial interface supports clock rates up to 50MHz.

Does this device support rail-to-rail output?

Yes, the LTC2636 incorporates rail-to-rail output buffers capable of swinging close to the supply rails.