LTC2637HDE-LMI10#TRPBF

Overview

The LTC2637HDE-LMI10#TRPBF is an octal, 10-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. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 4.3µs at ±1 LSB, and ultralow DAC-to-DAC crosstalk of 3nV•s. It incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 10-bit resolution and rail-to-rail output buffers
• Integrated 4.096V precision reference with 10ppm/°C drift
• Ultralow crosstalk between channels (<3nV•s)
• Guaranteed monotonic operation over –40°C to 125°C temperature range

Applications

• Process control and industrial automation systems
• Automatic test equipment
• Portable battery-powered instrumentation
• Automotive electronic modules

Procurement Notes

Verify the specific ordering suffixes against the manufacturer's current documentation to confirm package type, temperature grade, and power-on reset behavior. Ensure the I2C address pins (CA0, CA1, CA2) are correctly terminated for the target system topology. Confirm that the supply voltage remains within the 4.5V to 5.5V range required for the H-grade variant to maintain specified performance metrics.

Selection Notes

Select this component when multiple isolated analog outputs are required in a compact footprint. The H-grade designation ensures suitability for automotive environments requiring operation up to 125°C. Verify that the 4.096V full-scale range aligns with downstream ADC or amplifier input requirements. Consider the 16-lead MSOP package dimensions if board space is constrained relative to the DFN alternative.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 8-bit and 12-bit variants. The 'H' suffix denotes the automotive temperature grade (-40°C to 125°C), while 'LMI10' specifies the 10-bit resolution, mid-scale power-on reset, and 4.096V internal reference configuration. The 'DE' indicates the 14-lead DFN package, though the provided datasheet details both DFN and MSOP pinouts.

Replacement Considerations

Direct substitutes within the same family include LTC2637HMS-LMI10#TRPBF (MSOP package) or other resolution variants like LTC2637HDE-LMI12#TRPBF if higher precision is needed. Cross-family replacements such as the LTC2634 require interface adaptation due to SPI compatibility differences.