LTC2644IMS-L12#TRPBF

Overview

The LTC2644IMS-L12#TRPBF is a dual 12-bit PWM-to-voltage output DAC in a 12-lead MSOP package. It features an integrated 10ppm/°C reference providing a 2.5V full-scale output. The device converts PWM input signals to analog voltages with no latency, updating outputs within 8µs typically. It operates from 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 buffered outputs capable of sourcing/sinking up to 10mA at 5V.

Feature Summary

• Dual 12-bit resolution with pin-selectable internal (2.5V) or external reference
• No latency PWM-to-voltage conversion with settling time under 8µs
• Rail-to-rail output buffers supporting up to 10mA load current
• Guaranteed monotonic operation over –40°C to 85°C temperature range

Applications

• Digital calibration systems
• Trimming and adjustment circuits
• Level setting applications
• Process control and industrial automation
• Instrumentation and automotive systems

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging configuration containing 2,500 units. Confirm the IMS designation corresponds to the Industrial temperature grade (-40°C to 85°C). Ensure compatibility with the required 12-lead MSOP footprint during procurement planning.

Selection Notes

Select this model for applications requiring high accuracy (±2.5LSB INL) and fast response times without external filtering components. The 12-bit resolution is suitable for precision tasks. Consider the power-down mode (<1µA current) for energy-constrained designs. Verify that the PWM input frequency remains within the 30Hz to 6.25kHz limit for 12-bit accuracy.

Part Context

This component belongs to the LTC2644 family, which includes 10-bit and 8-bit variants. The L12 suffix specifically denotes the 12-bit resolution version with a 2.5V full-scale output when using the internal reference. Other family members share similar pinouts and functionality but offer different linearity specifications and update speeds.

Replacement Considerations

Direct substitutes within the same family include LTC2644IMS-L10#TRPBF (10-bit) and LTC2644IMS-L8#TRPBF (8-bit), offering lower resolution but potentially different cost profiles. For quad-channel requirements, the LTC2645 series serves as a functional equivalent with four channels instead of two.