LT1461CIS8-5#TRPBF

Voltage Reference Overview

The LT1461CIS8-5#TRPBF is a micropower precision low dropout series voltage reference from Analog Devices, packaged in an 8-lead plastic SOIC with tape and reel delivery. It provides a fixed 5V output with an initial accuracy of ±0.08% and a maximum temperature coefficient of 12ppm/°C over the industrial range of –40°C to 85°C. The device draws a typical supply current of 35µA and supports a minimum output drive current of 50mA. It features a shutdown pin for power management and operates with an input voltage range up to 20V.

Voltage Reference Feature Summary

• Combines high accuracy and low drift with micropower consumption and high output drive capability
• Utilizes advanced curvature compensation and trimmed precision thin-film resistors
• Includes a shutdown feature for system power down and load current switching
• Incorporates thermal shutdown protection against overload conditions

Voltage Reference Applications

• A/D and D/A converters
• Precision regulators
• Handheld instruments
• Power supplies

Voltage Reference Procurement Notes

Verify the specific suffix #TRPBF confirms tape and reel packaging rather than tube. Confirm the CIS8 designation matches the required industrial temperature grade and accuracy class. Ensure the 5V output variant aligns with circuit requirements. Check for automotive qualification if applicable, as standard parts differ from W-suffix versions.

Voltage Reference Selection Notes

Select this part when a fixed 5V reference with ±0.08% accuracy and 12ppm/°C drift is required in an industrial environment. It is suitable for applications needing low quiescent current alongside moderate load drive capabilities. Consider the SOIC-8 package constraints and thermal management needs for high dissipation scenarios.

Voltage Reference Part Context

This component belongs to the LT1461 family of micropower precision low dropout series voltage references. The family offers various output voltages and accuracy grades, including A, B, C, and D options. The LT1461CIS8-5#TRPBF specifically represents the C-grade industrial version with 5V output in tape and reel format.

Voltage Reference Replacement Considerations

LT1461CIS8-5#PBF (Tube Packaging)

Voltage Reference FAQ

What is the function of Pin 3 on the LT1461CIS8-5#TRPBF?

Pin 3 is the Shutdown (SHDN) pin. Driving it low shuts off the load current, reducing supply current to a maximum of 35µA. It operates normally when open or at logic high levels.

How does the LT1461 handle thermal overload?

The device includes thermal shutdown protection that turns off the output if the junction temperature exceeds approximately 150°C, protecting the part from damage during overload conditions.