LTC2637HMS-HZ8#PBF

Overview

The LTC2637HMS-HZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit configured to zero-scale in internal reference mode. The component is housed in a 16-lead MSOP package and is guaranteed monotonic over the –40°C to 125°C temperature range.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C interface with selectable slave addresses via CA0–CA2 pins

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific suffix HZ8 corresponds to the Automotive grade (–40°C to 125°C), Zero-Scale power-on reset, and 8-bit resolution within the 16-lead MSOP package. Confirm that the #PBF designation indicates lead-free compliance. Cross-reference the manufacturer's ordering guide to ensure the selected variant matches the required full-scale voltage and reset behavior for the target application.

Selection Notes

Select this part when eight isolated analog outputs are required with minimal inter-channel interference. The H-grade ensures performance across the extended automotive temperature range. Ensure the system supply voltage remains between 4.5V and 5.5V to support the 4.096V internal reference. Verify that the I2C bus speed requirements align with the device's standard or fast mode capabilities.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants exist with 2.5V full-scale outputs (L-grade) or different power-on reset behaviors (MI/MX suffixes). The HZ8 configuration specifically targets high-reliability applications requiring zero-scale initialization upon power-up.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.