LTC2645CMS-L12#TRPBF

Overview

The LTC2645CMS-L12#TRPBF 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, low-drift 10ppm/°C reference, providing a full-scale output of 2.5V. The device converts PWM input signals to buffered voltage outputs within 8µs typically, eliminating the need for external analog filters. 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
• No latency PWM-to-voltage conversion settling within 8µs
• Pin-selectable internal (2.5V) or external reference modes
• Rail-to-rail output buffers with 5mA/10mA drive capability

Applications

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

Procurement Notes

Verify the suffix #TRPBF indicates a tape and reel packaging format containing 2,500 pieces. Confirm the 'C' temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the ordering suffix matches the specific lot traceability requirements for your manufacturing process.

Selection Notes

Select this part when a PWM interface is required instead of SPI or I2C. The 12-bit resolution is suitable for applications needing ±2.5LSB INL. Consider the H-grade variant if operation below 0°C or above 85°C is necessary. Verify that the PWM frequency stays within the 30Hz to 6.25kHz range for optimal accuracy.

Part Context

This component belongs to the LTC2645 family, which also includes 10-bit and 8-bit variants. The CMS designation identifies the 16-lead MSOP package and Commercial temperature grade. The L12 suffix specifies the 12-bit resolution and 2.5V full-scale voltage derived from the internal reference.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires matching the quad channel count, 12-bit resolution, PWM input interface, and MSOP-16 package constraints.