LTC2636IMS-HMX12#TRPBF

Overview

The LTC2636IMS-HMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 4.096V full-scale output with an integrated precision reference and operates on a 4.5V to 5.5V supply. The device includes double-buffered data latches, ultralow crosstalk (<2.4nV•s), and guaranteed monotonicity over the –40°C to 125°C automotive temperature range. It communicates via a 50MHz SPI/MICROWIRE-compatible 3-wire serial interface and powers up to mid-scale in external reference mode.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with ±2.5 LSB maximum INL error.
• Automotive Temperature Grade: Operates reliably from –40°C to 125°C.
• Power-On Reset Configuration: Resets outputs to mid-scale when operating in external reference mode.
• Low Power Consumption: Draws approximately 1.1mA at VCC = 5V with internal reference active.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems
• Optical Networking

Procurement Notes

Verify the H-grade automotive rating and MSOP-16 package configuration. Confirm the TRPBF suffix indicates a 2500-piece tape and reel packaging format. Ensure the HMX12 designation matches the required mid-scale power-on reset behavior for external reference applications.

Selection Notes

Select this part for designs requiring eight synchronized analog outputs with high accuracy. The H-series variant is necessary for 4.096V full-scale ranges. The MX suffix is critical if the system requires mid-scale initialization during external reference operation. Verify that the 4.5V minimum supply voltage aligns with 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 within the family differ by full-scale voltage (2.5V or 4.096V), power-on reset behavior (zero or mid-scale), and temperature grades (commercial, industrial, or automotive).

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching resolution and package. For different reset behaviors, consider LTC2636IMS-HMZ12#TRPBF (zero-scale) or LTC2636IMS-HMI12#TRPBF (internal reference mid-scale). Lower resolution options like the 10-bit or 8-bit versions are available if cost reduction is prioritized.

FAQ

What is the full-scale output voltage for the LTC2636-H series?

The LTC2636-H series provides a full-scale output of 4.096V when using the internal reference.

How does the HMX12 suffix affect power-up behavior?

The HMX12 designation configures the device to reset all DAC outputs to mid-scale when power is applied while operating in external reference mode.

What is the maximum clock rate for the serial interface?

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