LTC2644IMS-L10#PBF

Overview

The LTC2644IMS-L10#PBF is a dual-channel, 10-bit PWM-to-voltage digital-to-analog converter (DAC) from Analog Devices. It features an integrated 10ppm/°C precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device converts PWM input signals into stable analog voltages without latency, updating outputs within 8µs typically. It supports rail-to-rail operation, pin-selectable internal or external references, and includes power-down capabilities consuming less than 1µA. Packaged in a 12-lead MSOP, it is designed for industrial and automotive applications requiring high accuracy and low component count.

Feature Summary

• Dual 10-bit DAC channels with no-latency PWM-to-voltage conversion
• Integrated 10ppm/°C reference providing 2.5V full-scale output
• Rail-to-rail output buffers sourcing/sinking up to 10mA at 5V
• Pin-selectable idle states and power-down mode (<1µA current)

Applications

• Digital calibration systems
• Trimming and adjustment circuits
• Process control and industrial automation
• Automotive instrumentation

Procurement Notes

Verify the suffix #PBF indicates tube packaging rather than tape and reel. Confirm the IMS package code corresponds to the 12-lead MSOP form factor. Ensure the L10 designation matches the required 10-bit resolution and 2.5V internal reference voltage for the specific design constraints.

Selection Notes

Select this part when PWM inputs are available and analog filtering components must be minimized. The 10-bit resolution offers a balance between cost and precision. Verify that the PWM frequency stays within the 25kHz limit for 10-bit accuracy. Consider the external reference option if system-wide voltage standards differ from the internal 2.5V reference.

Part Context

This component belongs to the LTC2644 family, which also includes 12-bit and 8-bit variants. The 'I' grade specifies an industrial temperature range of –40°C to 85°C. The 'MS' indicates the 12-lead plastic MSOP package. Other family members include the LTC2645 (quad channel) and different resolution codes like L12 or L8.

Replacement Considerations

Direct replacements within the same package and function include the LTC2644-L12#PBF for higher resolution or LTC2644-L8#PBF for lower resolution. For quad-channel requirements, the LTC2645 series is the functional equivalent. Cross-family substitutes require verifying interface compatibility and pinout alignment.