LT1790BIS6-1.25#TRMPBF

Voltage Reference Overview

The LT1790BIS6-1.25#TRMPBF is a micropower low dropout series voltage reference from Analog Devices, housed in a 6-lead ThinSOT package. It provides a fixed output voltage of 1.25V with B-grade initial accuracy of ±0.1% and a maximum temperature coefficient of 25ppm/°C. The device operates within an industrial temperature range of –40°C to 85°C, drawing a maximum supply current of 75µA. It supports a wide input voltage range up to 18V and features both sourcing and sinking capabilities.

Voltage Reference Feature Summary

• Curvature compensation and post-package trimming ensure high output accuracy and low drift.
• Capable of sourcing and sinking current for flexible positive or negative reference configurations.
• Minimized thermally induced hysteresis maintains stability across temperature cycles.

Voltage Reference Applications

• Handheld Instruments
• Negative Voltage References
• Industrial Control Systems
• Data Acquisition Systems
• Battery-Operated Equipment

Voltage Reference Procurement Notes

Verify the specific suffix #TRMPBF indicates tape and reel packaging containing 500 units, distinct from standard bulk or cut tape options. Confirm the B-grade designation aligns with the required ±0.1% accuracy and 25ppm/°C drift specifications for your design. Ensure the TSOT-23-6 footprint matches your PCB layout constraints.

Voltage Reference Selection Notes

Select this component when low power consumption is critical alongside moderate precision requirements. The B-grade offers a balance between cost and performance compared to the higher-precision A-grade. Consider the low dropout voltage characteristics if operating near minimum supply limits. Verify that the 75µA quiescent current fits within the system's battery life calculations.

Voltage Reference Part Context

This part belongs to the LT1790 family of micropower SOT-23 low dropout references. The family utilizes curvature compensation and trimmed thin-film resistors to achieve high accuracy. Variants are available in commercial (0°C to 70°C) and industrial (–40°C to 85°C) temperature grades, with A and B accuracy levels.

Voltage Reference Replacement Considerations

LT1790AIS6-1.25#TRMPBF: Offers improved accuracy (±0.05%) and lower drift (10ppm/°C) in the same package.

Voltage Reference FAQ

Can the LT1790BIS6-1.25#TRMPBF operate as a negative voltage reference?

Yes, because it can sink current, it can be configured to operate as a micropower negative voltage reference with performance similar to its positive operation.

What is the significance of the 'B' grade in the part number?

The 'B' grade indicates a maximum initial accuracy of ±0.1% and a maximum temperature coefficient of 25ppm/°C, which is less stringent than the 'A' grade but suitable for many general applications.