LTC2636HMS-HMI12#PBF

Overview

The LTC2636HMS-HMI12#PBF 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 supply voltage ranging from 4.5V to 5.5V and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes rail-to-rail output buffers, double-buffered data latches, and power-on reset circuitry that sets outputs to mid-scale upon initialization. The component is housed in a 16-lead MSOP package and supports an operating temperature range of –40°C to 125°C.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with guaranteed monotonicity over the full temperature range.
• Integrated Precision Reference: Features an internal 10ppm/°C reference generating a 4.096V full-scale output for the H-grade variant.
• High-Speed Serial Interface: Communicates via a 3-wire SPI/MICROWIRE interface supporting clock frequencies up to 50MHz.
• Power-On Reset Configuration: Configured for Mid-Scale reset in internal reference mode (HMI suffix) upon power-up.

Applications

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

Procurement Notes

Verify the specific ordering suffixes against the manufacturer's current documentation to ensure correct resolution, reset behavior, and package type. Confirm that the supply voltage requirements align with the H-grade specifications, which mandate a minimum of 4.5V. Check for lead-free compliance and RoHS status as indicated in the official datasheet.

Selection Notes

Select this part when eight independent 12-bit channels are required with a fixed 4.096V full-scale range. The HMI suffix indicates a mid-scale reset in internal reference mode; choose HZ or MX suffixes if zero-scale or external reference reset behaviors are needed. Ensure the system supply voltage remains within the 4.5V to 5.5V range specified for the H-grade devices.

Part Context

The LTC2636 family comprises octal DACs available in 12-, 10-, and 8-bit resolutions. The 'H' designation specifies the automotive grade with a 4.096V internal reference and extended temperature range. The 'MS' indicates the 16-lead MSOP package, while 'HMI' defines the mid-scale reset configuration in internal reference mode. This part is distinct from the L-grade variants which operate at lower voltages and provide a 2.5V full-scale output.

Replacement Considerations

Direct replacements within the same family include LTC2636HMS-LMI12#PBF (different reset behavior) or LTC2636HMS-HMX12#PBF (external reference mode). For different resolutions, consider LTC2636HMS-HMI10#PBF or LTC2636HMS-HMI8#PBF. Verify pin compatibility and electrical specifications before substitution.

FAQ

What is the full-scale output voltage for the LTC2636HMS-HMI12#PBF?

The full-scale output voltage is 4.096V when using the internal reference, as specified for the H-grade devices.

How does the power-on reset function work for this specific part number?

The HMI suffix indicates that the DAC outputs reset to mid-scale (approximately 2.048V) in internal reference mode upon power-up.

What is the maximum serial clock frequency supported by the LTC2636?

The device supports a serial clock (SCK) frequency of up to 50MHz.