LTC2637HMS-LMI8#TRPBF

Overview

The LTC2637HMS-LMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 supply voltage ranging from 4.5V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates double-buffered data latches, rail-to-rail output buffers guaranteed monotonic over the -40°C to 125°C temperature range, and a power-on reset circuit configured to initialize outputs to mid-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
• I2C-compatible serial interface with selectable slave addresses
• Power-on reset to mid-scale in internal reference mode

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 ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation ensures operation within the automotive temperature range of -40°C to 125°C. Ensure the MS package corresponds to the 16-lead MSOP form factor required for the design.

Selection Notes

Select this part when eight isolated voltage outputs are required with high accuracy and low crosstalk. The H-grade variant is necessary for applications requiring operation up to 125°C junction temperature. The LMI suffix specifies the internal power-on reset behavior to mid-scale, which differs from the LZ (zero-scale) or LMX (external reference) options.

Part Context

This component belongs to the LTC2637 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The H-series variants are distinguished by their higher full-scale output voltage of 4.096V compared to the L-series 2.5V output. The MS package denotes the 16-lead Mini Small Outline Package, offering a compact footprint suitable for dense PCB layouts.

Replacement Considerations

Direct functional equivalents within the same family include LTC2637HMS-LZ8#TRPBF (zero-scale reset) and LTC2637HMS-LMX8#TRPBF (external reference reset). For different resolutions, consider LTC2637HMS-LMI10#TRPBF or LTC2637HMS-LMI12#TRPBF, noting that pin compatibility remains consistent across the resolution variants.