LTC6655CHMS8-3#TRPBF

Overview

The LTC6655CHMS8-3#TRPBF is a precision bandgap voltage reference from Analog Devices, offering an output of 3V with ±0.05% initial accuracy and a maximum temperature coefficient of 5ppm/°C. It operates within a supply range of VOUT + 0.2V to 13.2V, drawing 7.5mA typical supply current. The device features low noise (0.67ppm RMS at 10Hz–1kHz) and supports ±5mA source/sink currents. Packaged in an 8-lead MSOP, it functions across –40°C to 125°C.

Feature Summary

• Advanced curvature compensation ensures predictable temperature characteristics and high accuracy.
• Superior load regulation with both sourcing and sinking capabilities maintains performance under varying loads.
• Dedicated shutdown mode significantly reduces power consumption for energy-efficient applications.

Applications

• Instrumentation and test equipment
• High resolution data acquisition systems
• Precision battery monitors

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the CHMS8 designation corresponds to the 8-lead plastic MSOP package variant. Ensure compatibility with system requirements for the 3V fixed output and 5ppm/°C drift specification before finalizing procurement decisions.

Selection Notes

Select this component when a 3V output is required with moderate precision needs. The CH grade offers ±0.05% accuracy, suitable where calibration is feasible. Consider the BH grade if tighter ±0.025% accuracy is necessary. Evaluate thermal management requirements given the 7.5mA operating current and MSOP package thermal resistance.

Part Context

This part belongs to the LTC6655 family of precision references, designed for high-resolution measurements. It complements other variants like the LTC6655LN for lower noise or the LS8 package for hermetic stability. The family shares core architecture but varies in accuracy grades and packaging options to suit diverse industrial and automotive environments.

Replacement Considerations

LTC6655BHMS8-3#TRPBF offers higher accuracy (±0.025%) with identical pinout and functionality.

FAQ

How does the SHDN pin behave if left unconnected?

An internal pull-up resistor ties the SHDN pin to VIN, placing the device in normal operation. External pulling high is recommended to prevent accidental shutdown from noise.

What is the minimum dropout voltage for the 3V output version?

The minimum supply voltage is VOUT + 0.2V, allowing operation down to 3.2V while maintaining specified performance.