LTC2637HMS-HMI8#PBF

Overview

The LTC2637HMS-HMI8#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. Each DAC channel includes a rail-to-rail output buffer and double-buffered data latches. The part guarantees monotonicity over the automotive temperature range of –40°C to 125°C and incorporates a power-on reset circuit that defaults outputs to mid-scale.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V internal 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

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable battery-powered instrumentation
• Automotive electronic control units

Procurement Notes

Verify the specific suffix HMI8 corresponds to the MSOP-16 package, 8-bit resolution, 4.096V full-scale, and mid-scale power-on reset behavior. 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 component when multiple low-resolution voltage outputs are needed in a compact footprint. The H-grade variant is necessary for high-temperature automotive or industrial environments. Ensure the system supply voltage remains within the 4.5V to 5.5V range to maintain specified performance and linearity characteristics.

Part Context

This part belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolutions. The 'H' suffix denotes the automotive temperature grade, while 'MS' indicates the 16-lead MSOP package. Other variants include the 'L' series for 2.5V outputs and 'DE' packages for DFN form factors.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2637HMS-HMI10#PBF (10-bit) and LTC2637HMS-HMI12#PBF (12-bit). Lower resolution options like LTC2637HMS-HZ8#PBF share the package but differ in power-on reset behavior.