LTC2636CMS-HMX8#TRPBF

Overview

The LTC2636CMS-HMX8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 16-lead MSOP package and operates within the automotive temperature range of -40°C to 125°C. The device utilizes an external reference mode, resetting to mid-scale upon power-up. It supports a supply voltage of 4.5V to 5.5V with a full-scale output determined by the external reference voltage. Communication occurs via a 3-wire SPI/MICROWIRE interface at clock rates up to 50MHz. Key specifications include guaranteed monotonicity, rail-to-rail output buffering, and double-buffered data latches for ultralow crosstalk.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with 8-bit resolution in a single package.
• Automotive Temperature Grade: Operates reliably from -40°C to +125°C.
• External Reference Mode: Full-scale output is set by the external reference voltage; resets to mid-scale on power-up.
• High-Speed Interface: Compatible with SPI/MICROWIRE standards, supporting serial clock frequencies up to 50MHz.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation matches the required -40°C to 125°C operating temperature range for the target application environment. Ensure the external reference circuitry aligns with the device's input voltage requirements.

Selection Notes

Select this part when eight low-cost, 8-bit DAC channels are required in an automotive or high-temperature industrial environment. Choose the H-grade variant over C or I grades if operation above 85°C is necessary. The external reference configuration is suitable for systems requiring flexible full-scale voltage ranges defined by an external source rather than fixed internal references.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 12-bit variants. The family shares common architectural features such as the 3-wire serial interface and rail-to-rail output buffers. Variations exist between L-grade (2.7V–5.5V supply, 2.5V FS) and H-grade (4.5V–5.5V supply, 4.096V FS internal ref) devices, as well as different reset behaviors (Zero-Scale vs. Mid-Scale).

Replacement Considerations

Direct pin-compatible replacements within the same package must be selected from the LTC2636 family. Consider LTC2636CMS-HMX10 or LTC2636CMS-HMX12 for higher resolution requirements. For lower resolution needs, LTC2636CMS-LMX8 offers similar functionality but with a wider supply voltage range (2.7V–5.5V) and commercial temperature grade.