LTC2637HDE-LZ8#PBF

Overview

The LTC2637HDE-LZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and a power-on reset circuit configured to zero-scale in internal reference mode.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail buffered outputs with ultralow crosstalk (<3nV•s)
• Automotive grade operation from –40°C to 125°C

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel output
• Portable battery-powered instrumentation
• Optical networking signal generation

Procurement Notes

Verify the specific suffix 'LZ8' indicates zero-scale power-on reset behavior with the internal 4.096V reference. 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 eight isolated voltage outputs are required within a compact footprint. Ensure the system supply voltage remains between 4.5V and 5.5V to support the 4.096V full-scale range. Consider the 14-lead DFN package thermal characteristics if high output currents are anticipated.

Part Context

This component belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolution options. The H-grade variant specifically targets automotive applications, providing extended temperature coverage compared to the C-grade (commercial) and I-grade (industrial) counterparts available in the same series.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the LTC2637HDE-LZ10#PBF (10-bit) and LTC2637HDE-LZ12#PBF (12-bit). These parts share identical pinouts and interfaces but offer higher resolution.