LTC2645HMS-L8#PBF

Overview

The LTC2645HMS-L8#PBF is a quad 8-bit PWM-to-voltage output DAC from Analog Devices, housed in a 16-lead MSOP package. It integrates a high-accuracy, low-drift 10ppm/°C reference with a full-scale output of 2.5V. The device features rail-to-rail buffered outputs capable of sourcing/sinking up to 5mA at 3V or 10mA at 5V. It operates on a single 2.7V to 5.5V supply and supports PWM input frequencies up to 100kHz. Outputs update within 8µs typically, eliminating the need for external analog filters.

Feature Summary

• Quad 8-bit resolution with ±0.5 LSB max DNL and ±0.05 LSB max INL
• Integrated 10ppm/°C reference providing 2.5V full-scale output
• Rail-to-rail voltage outputs with 5mA (3V) / 10mA (5V) drive capability
• Pin-selectable internal or external reference modes

Applications

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

Procurement Notes

Verify the suffix #PBF indicates tube packaging rather than tape and reel. Confirm the H-grade temperature range (-40°C to 125°C) matches application requirements. Ensure IOVCC levels are compatible with the driving PWM logic signals.

Selection Notes

Select this part for applications requiring direct PWM-to-voltage conversion without latency. The L8 variant provides 8-bit resolution; choose L10 or L12 if higher precision is needed. Verify that the 2.5V internal reference range suits the target voltage span or consider external reference mode via REFSEL.

Part Context

This component belongs to the LTC2645 family, which includes 12-bit (L12), 10-bit (L10), and 8-bit (L8) variants. All share the same 16-lead MSOP footprint and pinout, differing primarily in resolution and linearity specifications. The H-grade denotes automotive temperature qualification.

Replacement Considerations

LTC2645IMS-L8#TRPBF offers identical electrical performance but in tape-and-reel packaging instead of tubes.