LTC2644HMS-L8#TRPBF

Overview

The LTC2644HMS-L8#TRPBF is a dual 8-bit PWM-to-voltage digital-to-analog converter (DAC) from Analog Devices, housed in a 12-lead MSOP package. It features an integrated 10ppm/°C reference providing a 2.5V full-scale output or supports external references. The device converts PWM input signals into buffered voltage outputs with typical settling times of 7µs and rail-to-rail drive capability up to 10mA at 5V. Operating on a single 2.7V to 5.5V supply, it includes pin-selectable idle states and power-down modes, ensuring low power consumption and high accuracy for industrial applications.

Feature Summary

• Dual 8-bit resolution with ±0.5 LSB maximum DNL and ±0.05 LSB maximum INL
• No latency PWM-to-voltage conversion with typical 7µs settling time
• Integrated 10ppm/°C reference yielding 2.5V full-scale output
• Rail-to-rail output buffers capable of sourcing/sinking up to 10mA at 5V

Applications

• Digital calibration systems
• Trimming and adjustment circuits
• Process control and industrial automation
• Instrumentation and automotive electronics

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging configuration containing 2,500 pieces. Confirm the 'H' temperature grade designation corresponds to the automotive range of –40°C to 125°C. Ensure compatibility with the required IOVCC logic levels before procurement.

Selection Notes

Select this model for applications requiring 8-bit resolution where cost efficiency is prioritized over higher precision. The L8 variant offers tighter linearity specifications than lower-grade options but less resolution than the L12. Consider the internal reference for simplified designs or external reference for custom full-scale voltages.

Part Context

This component belongs to the LTC2644 family of dual PWM DACs. The 'H' suffix denotes the extended temperature grade suitable for automotive environments, while 'L8' specifies the 8-bit resolution variant. It shares the same 12-lead MSOP footprint and core architecture as the L10 and L12 models within the series.

Replacement Considerations

Direct substitutes include other LTC2644 variants such as the LTC2644HMS-L10#TRPBF or LTC2644HMS-L12#TRPBF if higher resolution is acceptable. Single-channel alternatives like the LTC2642 may be considered if only one DAC channel is required.