LTC2645CMS-L8#TRPBF

Overview

The LTC2645CMS-L8#TRPBF is a quad 8-bit PWM-to-voltage output DAC from Analog Devices Inc., 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 features rail-to-rail buffered outputs capable of sourcing/sinking up to 5mA at 3V or 10mA at 5V. It operates on a single 2.7V to 5.5V supply with digital inputs supported by a separate 1.71V to 5.5V IOVCC. Key electrical parameters include ±0.5LSB maximum DNL and ±0.05LSB maximum INL for the 8-bit variant. Outputs update and settle within 8µs typically.

Feature Summary

• Quad 8-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
• Integrated 10ppm/°C precision reference source

Applications

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

Procurement Notes

Verify the suffix #TRPBF indicates a tape and reel packaging format containing 2,500 pieces. Confirm the 'C' temperature grade designation corresponds to the commercial range of 0°C to 70°C. Ensure the ordering information matches the specific 8-bit resolution variant required for the design.

Selection Notes

Select this component when a compact quad DAC solution driven by PWM signals is required without external analog filters. The 8-bit resolution suits applications where ±0.5LSB linearity is sufficient. Consider the 16-lead MSOP package constraints and ensure the PCB layout supports the separate analog and digital ground planes recommended for optimal performance.

Part Context

This part belongs to the LTC2645 family, which includes 12-bit and 10-bit variants. The CMS-L8 designation specifically identifies the Commercial temperature grade, MSOP package, and 8-bit resolution. It serves as a direct replacement for discrete PWM filtering solutions in space-constrained designs.

Replacement Considerations

The LTC2645IMS-L8#PBF is a verified equivalent offering identical electrical specifications but packaged in tubes instead of tape and reel. Other family members like the LTC2645HMS-L12#PBF provide higher resolution or extended temperature ranges but differ in bit depth.