LTC2645HMS-L10#PBF

Overview

The LTC2645HMS-L10#PBF is a quad 10-bit PWM-to-voltage output DAC in a 16-lead MSOP package. It features an integrated 10ppm/°C reference, providing a 2.5V full-scale output. The device measures PWM period and pulse width, updating outputs within 8µs typically. It operates on a single 2.7V to 5.5V supply with rail-to-rail buffered outputs capable of sourcing/sinking up to 10mA at 5V. Key specifications include ±1 LSB max DNL, ±2.5 LSB max INL, and pin-selectable internal or external reference modes.

Feature Summary

• Quad 10-bit resolution with no latency PWM-to-voltage conversion
• Integrated 10ppm/°C reference yielding 2.5V full-scale output
• Rail-to-rail output buffers sourcing/sinking up to 10mA (5V)
• Pin-selectable idle states: power-down, hold, zero-scale, or full-scale

Applications

• Digital Calibration
• Trimming and Adjustment
• Level Setting
• Process Control and Industrial Automation
• Automotive Systems

Procurement Notes

Verify the suffix #PBF indicates lead-free packaging and tube shipping format. Confirm the H-grade designation for automotive temperature range (-40°C to 125°C). Ensure the L10 suffix corresponds to 10-bit resolution and 2.5V internal reference full-scale voltage as per the selection guide.

Selection Notes

Select this model for applications requiring four independent voltage outputs controlled by PWM signals without external filters. Choose the H-grade variant if operation above 85°C is required. Consider the L12 or L8 variants if higher or lower resolution respectively is needed, noting that settling time and maximum input frequency vary with resolution.

Part Context

This component belongs to the LTC2645 family, which includes 12-bit (L12), 10-bit (L10), and 8-bit (L8) versions. All variants share the same 16-lead MSOP package and core architecture but differ in linearity specifications and maximum supported PWM input frequencies.

Replacement Considerations

Public confirmed substitutes are not available in the provided documentation. Cross-model compatibility exists within the LTC2645 family (e.g., LTC2645HMS-L12#PBF) for pin-compatible upgrades, though resolution and timing parameters will change.