LTC2645IMS-L10#PBF

Overview

The Analog Devices LTC2645IMS-L10#PBF is a quad 10-bit PWM-to-voltage output DAC 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 measures PWM period and pulse width, updating outputs after each rising edge with typical settling to 10-bit accuracy within 7.4µs. It operates on a single 2.7V to 5.5V supply, supports rail-to-rail buffered voltage outputs capable of sourcing/sinking up to 10mA at 5V, and features pin-selectable internal or external reference modes.

Feature Summary

• Quad 10-bit resolution with ±1 LSB maximum DNL and ±1 LSB maximum INL
• Integrated 10ppm/°C reference yielding 2.5V full-scale output
• No latency PWM-to-voltage conversion with 7.4µs typical settling time
• Pin-selectable idle mode states (power-down, hold, zero-scale, full-scale)

Applications

• Digital calibration systems
• Trimming and adjustment circuits
• Process control and industrial automation
• Instrumentation level setting

Procurement Notes

Verify the specific suffix L10 confirms 10-bit resolution and the IMS designation indicates the 16-lead MSOP package. Confirm the temperature grade I corresponds to the –40°C to 85°C operating range required for the application. Ensure the #PBF lead-free designation matches environmental compliance needs.

Selection Notes

Select this part when a quad channel DAC driven by PWM signals is required without external analog filters. The 10-bit resolution balances precision and speed, offering 7.4µs settling. Consider the integrated 2.5V reference if space is limited; otherwise, use external reference mode via REFSEL. Ensure PWM input frequencies remain below 25kHz for guaranteed accuracy.

Part Context

This component belongs to the LTC2645 family, which includes 12-bit (LTC2645-L12) and 8-bit (LTC2645-L8) variants. All share the same 16-lead MSOP footprint and functional architecture but differ in resolution, linearity specifications, and maximum PWM input frequency capabilities.

Replacement Considerations

The LTC2645IMS-L10#PBF is functionally equivalent to the bare die variant LTC2645-L10. Verify that any substitute maintains the 10-bit resolution and 16-lead MSOP package form factor.