LT6650HS5#TRMPBF

Voltage Reference Overview

The LT6650HS5#TRMPBF is a micropower, low voltage series voltage reference featuring an integrated rail-to-rail buffer amplifier. It provides a nominal 400mV output with a maximum initial accuracy of ±1.5% and a temperature coefficient of 30 ppm/°C. The device operates from a supply voltage range of 1.4V to 18V, drawing a typical quiescent current of 5.6µA. It supports bidirectional current sourcing and sinking up to 200µA and is specified for operation over the extended industrial temperature range of –40°C to +125°C.

Voltage Reference Feature Summary

• Integrated rail-to-rail buffer amplifier allows external scaling of the 400mV reference to any desired value up to the supply voltage using two resistors.
• Capable of both sourcing and sinking load currents up to 200µA while maintaining stability with output capacitors of 1µF or higher.
• Configurable as a shunt reference for positive or negative voltage applications within the operating input range.

Voltage Reference Applications

• Battery-operated systems requiring extended life due to low quiescent current
• Handheld instruments and portable devices
• Industrial control systems
• Data acquisition systems
• Negative voltage reference configurations

Voltage Reference Procurement Notes

Verify that the specific suffix HS5 corresponds to the –40°C to +125°C operating temperature grade required for the application. Confirm the #TRMPBF designation indicates lead-free tape and reel packaging. Ensure the design accounts for the 1µF minimum output capacitance requirement for stability and check that the supply voltage remains within the 1.4V to 18V operational limits.

Voltage Reference Selection Notes

Select this component when a very low voltage reference is needed in a compact SOT-23 package. The HS5 grade is appropriate for environments requiring operation down to –40°C. Consider the internal buffer's ability to drive loads directly if high impedance sources are not available. Evaluate the need for shunt configuration if negative references are required, as this part supports such topology without additional active components.

Voltage Reference Part Context

This part belongs to the LT6650 family of micropower voltage references. While other variants like the CS5 and IS5 exist, they differ primarily in their specified operating temperature ranges (0°C to 70°C and –40°C to 85°C, respectively). All variants share the same core architecture, pinout, and electrical characteristics regarding accuracy and noise, differing only in thermal qualification.

Voltage Reference Replacement Considerations

LT6650IS5#TRMPBF

Voltage Reference FAQ

How is the output voltage adjusted above 400mV?

The output voltage can be scaled to any value between 400mV and nearly the supply potential by connecting two external feedback resistors between the OUT, FB, and GND pins to set the gain of the internal buffer amplifier.

What is the minimum output capacitance required for stability?

The device requires a total output capacitance of 1µF or greater to ensure stability. Higher capacitance values improve transient response performance.