LTC2645HMS-L12#PBF

Overview

The LTC2645HMS-L12#PBF is a quad 12-bit PWM-to-voltage output DAC from Analog Devices, housed in a 16-lead MSOP package. It integrates a high-accuracy 10ppm/°C reference, providing a 2.5V full-scale output. The device converts PWM input signals into stable analog voltages with no latency, updating outputs within 8µs typically. It operates on a single 2.7V to 5.5V supply and supports PWM inputs from 1.71V to 5.5V. Key electrical parameters include ±2.5LSB maximum INL, ±1LSB maximum DNL, and rail-to-rail output buffers capable of sourcing/sinking up to 5mA at 3V or 10mA at 5V.

Feature Summary

• Quad 12-bit resolution with integrated 10ppm/°C reference for 2.5V full-scale output
• No latency PWM-to-voltage conversion with settling time under 8µs
• Pin-selectable internal or external reference modes
• Rail-to-rail output buffers with 5mA (3V) or 10mA (5V) drive capability

Applications

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

Procurement Notes

Verify the specific suffix L12 confirms the 12-bit resolution and 2.5V internal reference configuration. Confirm the H-grade designation indicates operation across the –40°C to 125°C temperature range. Ensure the #PBF suffix denotes lead-free compliance and RoHS adherence before procurement.

Selection Notes

Select this component when low-latency voltage generation from PWM signals is required without external filters. The 12-bit resolution suits applications needing precise calibration. Consider the 16-lead MSOP package for space-constrained designs. Verify that the PWM input frequency remains within the 30Hz to 6.25kHz range for optimal accuracy.

Part Context

This part belongs to the LTC2645 family, which includes 10-bit and 8-bit variants. The 'H' suffix specifies the automotive temperature grade (-40°C to 125°C), while 'L12' defines the 12-bit resolution with a 2.5V internal reference. It shares the same pinout and core architecture as other resolutions in the series.

Replacement Considerations

Direct substitutes within the same family include LTC2645IMS-L10#PBF (10-bit) and LTC2645IMS-L8#PBF (8-bit). These offer identical pinouts and functionality but with lower resolution. Cross-family replacements require verification of interface compatibility and performance specifications.