LTC2637IMS-HMI8#PBF

Overview

The Analog Devices LTC2637IMS-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) housed in a 16-lead MSOP package. It features an integrated precision reference providing a 4.096V full-scale output, operating from a 4.5V to 5.5V supply. The device communicates via a 2-wire I2C-compatible serial interface supporting standard and fast modes. Key electrical characteristics include a maximum integral nonlinearity (INL) of ±0.5 LSB, a settling time of 3.9µs at ±1 LSB, and a power-on reset function configured to initialize outputs to mid-scale.

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 guaranteed monotonic over –40°C to 125°C
• I2C interface with selectable slave addresses via CA0–CA2 pins

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automotive instrumentation
• Optical networking devices

Procurement Notes

Verify the specific suffix HMI8 against the manufacturer's current ordering guide to confirm the mid-scale reset configuration and automotive temperature grade. Ensure the 16-lead MSOP footprint matches the PCB design requirements for thermal dissipation during operation.

Selection Notes

Select this part when eight isolated analog outputs are required within a compact surface-mount footprint. The internal 4.096V reference eliminates the need for external components, reducing board space. Verify that the system supply voltage remains within the 4.5V to 5.5V range to ensure specified performance levels.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The IMS designation indicates the Industrial temperature grade (-40°C to 85°C), while the H suffix specifies the 4.096V full-scale range. The MI suffix defines the power-on reset behavior as mid-scale initialization.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the LTC2637IMS-LMI8#PBF for lower voltage applications or the LTC2637IMS-HMX8#PBF if zero-scale reset is preferred. Cross-family replacements require verification of I2C address compatibility and output drive capabilities.