LTC2637HDE-LMI8#TRPBF

Overview

The LTC2637HDE-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. Communication is handled 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 is guaranteed monotonic over the automotive temperature range of –40°C to 125°C and incorporates a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent 8-bit DAC channels with ±0.5 LSB DNL and ±0.05 LSB INL accuracy.
• Integrated Precision Reference: Includes a 4.096V internal reference with low drift (10ppm/°C); supports external reference input.
• Automotive Grade Reliability: Guaranteed monotonic operation across the extended temperature range of –40°C to 125°C.
• Low Power Consumption: Draws approximately 1mA total supply current at 5V, with power-down mode reducing current to 30µA.

Applications

• Process Control and Industrial Automation Systems
• Automatic Test Equipment (ATE)
• Portable Battery-Powered Equipment
• Automotive Electronic Control Units

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms the tape and reel packaging quantity of 2500 units. Confirm the 'H' grade designation matches the required –40°C to 125°C operating temperature range for the target application environment. Ensure the LMI8 suffix corresponds to the MSOP-16 package variant if pin compatibility with existing layouts is critical.

Selection Notes

Select this component when multiple isolated voltage outputs are required in a compact footprint. The H-grade version is necessary for applications exceeding 85°C ambient temperatures. Verify that the 4.096V full-scale range aligns with downstream ADC or amplifier input requirements. Consider the I2C address configuration pins (CA0–CA2) if multiple devices share the same bus.

Part Context

This part belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. The 'H' suffix denotes the automotive temperature grade, while 'I' indicates industrial grade and 'C' commercial grade. The 'DE' package is a 14-lead DFN, whereas 'MS' is a 16-lead MSOP. The '#TRPBF' suffix indicates lead-free tape and reel packaging.

Replacement Considerations

Publicly confirmed substitute part numbers include other variants within the LTC2637 family, such as LTC2637IMS-LMI8#TRPBF (Industrial Grade, MSOP Package) or LTC2637IDE-LMI8#TRPBF (Industrial Grade, DFN Package). Cross-referencing requires matching resolution, package type, and temperature grade specifications.