LTC2636HDE-HMI12#PBF

Overview

The LTC2636HDE-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. Packaged in a 14-lead DFN, it includes double-buffered data latches and a power-on reset circuit that initializes outputs to mid-scale.

Feature Summary

• Octal 12-bit resolution with guaranteed monotonicity over the operating temperature range
• Integrated 10ppm/°C reference yielding a 4.096V full-scale output
• Ultralow DAC-to-DAC crosstalk specification of less than 2.4nV•s
• Power-on reset function configured to initialize all channels to mid-scale

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive applications
• Optical networking

Procurement Notes

Verify the specific ordering suffix HMI12#PBF against official Analog Devices documentation to confirm the mid-scale reset behavior and lead-free status. Ensure the design supports the required 4.5V to 5.5V supply range for the H-grade variant. Confirm package compatibility with the 14-lead DFN footprint and exposed pad grounding requirements.

Selection Notes

Select this component when eight independent 12-bit voltage outputs are required within a compact form factor. The H-grade designation indicates suitability for automotive environments with an extended temperature range up to 125°C. Choose this part over L-grade variants if the system requires a 4.096V full-scale range rather than 2.5V. Verify that the 50MHz SPI clock speed aligns with the host controller's capabilities.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 8-bit resolutions. Variants within the family differ by full-scale voltage (L for 2.5V, H for 4.096V), temperature grade (C, I, H), and power-on reset configuration (Z for zero-scale, MI/MX for mid-scale). The DE suffix denotes the 14-lead DFN package used in this specific model.

Replacement Considerations

Direct replacements include other LTC2636 variants such as LTC2636HDE-HMX12#PBF or LTC2636HDE-HZ12#PBF, provided the power-on reset behavior matches the application requirements. Cross-family alternatives like the LTC2637 offer I2C interfaces instead of SPI.