LTC2637HDE-LZ12#TRPBF

Overview

The LTC2637HDE-LZ12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates a high-accuracy, low-drift reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device features rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication occurs via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes power-on reset circuits and double-buffered data latches within a 14-lead DFN package.

Feature Summary

• Octal architecture providing eight independent 12-bit DAC channels in a compact footprint
• Integrated precision reference yielding a 4.096V full-scale output with ±10ppm/°C drift
• Rail-to-rail output buffers ensuring guaranteed monotonicity across the automotive temperature range
• I2C-compatible serial interface with selectable slave addresses via CA0 pin

Applications

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

Procurement Notes

Verify the specific suffix 'LZ' indicates a power-on reset to zero-scale in internal reference mode. Confirm the 'H' grade designation matches the required –40°C to 125°C operating temperature range for the target application environment.

Selection Notes

Select this part when multiple isolated voltage outputs are required from a single controller. Ensure the system supply voltage remains between 4.5V and 5.5V to support the 4.096V internal reference. Consider the 14-lead DFN package dimensions if board space is constrained.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. Variants include the LTC2637-L series for 2.5V full-scale operation on 2.7V–5.5V supplies and the LTC2637-H series for 4.096V full-scale operation on 4.5V–5.5V supplies. Package options include 14-lead DFN and 16-lead MSOP.

Replacement Considerations

Public confirmed substitute part numbers: None.