LT1790BIS6-5#TRMPBF

Voltage Reference Overview

The LT1790BIS6-5#TRMPBF is a micropower low dropout series voltage reference from Analog Devices, housed in a 6-lead plastic TSOT-23 package. It provides a fixed output voltage of 5V with an initial accuracy of ±0.1% and a maximum temperature coefficient of 25ppm/°C. The device operates within a supply voltage range of 5.5V to 18V and draws a maximum no-load supply current of 80µA. It is guaranteed functional over an operating temperature range of –40°C to 125°C, with specified performance documented for the industrial grade range of –40°C to 85°C.

Voltage Reference Feature Summary

• Combines curvature compensation and trimmed precision thin-film resistors for high accuracy and low drift
• Capable of sourcing and sinking current to function as a positive or negative voltage reference
• Post-package trimming minimizes temperature coefficient and enhances output accuracy
• Designed with special care to minimize thermally induced hysteresis

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 cut tape or tube options. Confirm the 'I' designation corresponds to the industrial temperature range of –40°C to 85°C rather than the commercial 0°C to 70°C variant. Ensure the 'S6' package code matches the required 6-lead TSOT-23 footprint for your PCB layout.

Voltage Reference Selection Notes

Select this component when low power dissipation and small package size are critical constraints. The B grade offers 0.1% accuracy suitable for general precision applications, while the I grade ensures operation across wider industrial temperatures. Consider the minimum operating voltage requirements relative to the 5V output when designing the input supply rail.

Voltage Reference Part Context

This part belongs to the LT1790 family of micropower SOT-23 low dropout references. The family includes various output voltages and accuracy grades (A and B) with different temperature ranges (Commercial and Industrial). The LT1790 series is designed to replace shunt references by eliminating the need to idle the entire load current, offering significant power savings in battery-operated systems.

Voltage Reference Replacement Considerations

LT1790BIS6-5#TRPBF

Voltage Reference FAQ

Can the LT1790BIS6-5 be used as a negative voltage reference?

Yes, because the device can sink current, it can operate as a micropower negative voltage reference with the same performance characteristics as its positive reference mode.

What is the difference between the A and B grades in the LT1790 family?

The A grade provides higher accuracy (0.05% max) and lower drift (10ppm/°C max), whereas the B grade offers 0.1% max accuracy and 25ppm/°C max drift.