LTC2644IMS-L8#PBF

Overview

The LTC2644IMS-L8#PBF is a dual 8-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, or supports external references. The device converts PWM input signals to stable analog voltages with typical settling times of 7µs and rail-to-rail outputs capable of sourcing/sinking up to 10mA at 5V. Operating on a single 2.7V to 5.5V supply, it includes pin-selectable idle states and power-down modes for low-power applications.

Feature Summary

• Dual 8-bit resolution with ±0.5 LSB max DNL and ±0.05 LSB max INL
• No latency PWM-to-voltage conversion with 7µs typical settling time
• Integrated 10ppm/°C reference (2.5V FS) or selectable external reference
• Rail-to-rail buffered outputs with 10mA drive capability at 5V

Applications

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

Procurement Notes

Verify the H suffix indicates the automotive temperature grade (-40°C to 125°C). Confirm the L8 designation specifies 8-bit resolution with a 2.5V internal reference full scale. Ensure the IMS8 package matches the required 12-lead MSOP footprint. Check datasheet specifications for load regulation and output impedance under expected operating conditions.

Selection Notes

Select this part when high-speed PWM-to-voltage conversion is required without external filters. The 8-bit resolution suits applications where ±0.5 LSB DNL is sufficient. Choose between internal reference for simplicity or external reference for custom voltage ranges. Consider the 10mA output current capability for direct driving of low-impedance loads.

Part Context

This component belongs to the LTC2644 family, which offers 12-bit, 10-bit, and 8-bit resolutions. The IMS8 variant specifically denotes the Industrial/Automotive temperature grade housed in a 12-lead MSOP package. It shares the same core architecture as other LTC2644 models but provides optimized linearity specifications for 8-bit operation.

Replacement Considerations

LTC2644IMS-L10#PBF: Higher 10-bit resolution with tighter linearity specs. LTC2644IMS-L12#PBF: Highest 12-bit resolution with ±2.5 LSB INL. All variants share identical pinouts and package dimensions.