LTC2636HMS-HZ8#TRPBF

Overview

The LTC2636HMS-HZ8#TRPBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a temperature coefficient of 10ppm/°C and 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 that are guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to zero-scale in internal reference mode.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with ±0.5 LSB DNL and ±0.05 LSB INL.
• Automotive Grade: Operates reliably from –40°C to +125°C with a 4.096V full-scale output.
• Integrated Reference: Includes a low-drift 10ppm/°C internal reference; power-on reset clears outputs to zero-scale.
• High-Speed Interface: Supports 3-wire serial communication at SCK frequencies up to 50MHz.

Applications

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

Procurement Notes

Verify the specific suffix HZ8 corresponds to the 8-bit resolution, H-grade automotive temperature range, and zero-scale power-on reset configuration. Confirm the MS package type and tape-and-reel delivery format match system requirements. Cross-reference the datasheet revision for any updates to electrical characteristics or pin definitions before finalizing procurement.

Selection Notes

Select this part when eight synchronized DAC channels are required in an automotive environment. The 4.096V span suits applications needing higher dynamic range than the 2.5V variant. Ensure the supply voltage remains within 4.5V to 5.5V. Consider the external reference option if tighter accuracy or different scaling is needed compared to the integrated 10ppm/°C reference.

Part Context

This component belongs to the LTC2636 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The 'H' designation indicates automotive qualification with extended temperature limits, while 'Z' specifies the zero-scale power-on reset behavior. The 'MS' suffix denotes the 16-lead MSOP package, which provides dedicated CLR and LDAC pins not present in the DFN version.

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching resolution and package, such as LTC2636HMI8 or LTC2636HZ12, noting differences in power-on reset behavior. For I2C interfaces, consider the LTC2637 family. Verify thermal resistance and pin compatibility when swapping between DFN and MSOP packages.