LTC2637HDE-LMI8#PBF

Overview

The LTC2637HDE-LMI8#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 with a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes a power-on reset circuit configured to initialize outputs to mid-scale in internal reference mode. The component is housed in a 14-lead 4mm × 3mm DFN package.

Feature Summary

• Octal 8-bit resolution with rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• Integrated 4.096V full-scale reference with ±10ppm/°C temperature coefficient
• I2C-compatible serial interface with selectable internal or external reference input
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix HDE-LMI8 corresponds to the 14-lead DFN package, Industrial temperature grade, and Mid-Scale power-on reset configuration as defined in the manufacturer's selection guide. Confirm RoHS compliance and lead-free status through official documentation before procurement.

Selection Notes

Select this part for applications requiring eight independent voltage outputs with high accuracy and low drift. Ensure the supply voltage remains within the 4.5V to 5.5V range required for the H-grade internal reference. Consider the 14-lead DFN package constraints for thermal management and PCB layout requirements.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit variants. The 'H' designation indicates operation with a 4.096V internal reference and a 4.5V minimum supply voltage, distinguishing it from the 'L' variant which uses a 2.5V reference and supports lower supply voltages down to 2.7V.

Replacement Considerations

Direct substitutes within the same family include other LTC2637 variants with different resolutions or reset configurations, such as LTC2637HDE-LZ8#PBF (Zero-Scale reset) or LTC2637HDE-LMI10#PBF (10-bit). Verify pin compatibility and electrical specifications when considering cross-resolution replacements.