LT1461ACS8-5#TRPBF

Voltage Reference Overview

The LT1461ACS8-5#TRPBF is a micropower precision low dropout series voltage reference manufactured by Analog Devices Inc. It provides a fixed 5V output with an initial accuracy of ±0.04% and a maximum temperature coefficient of 3ppm/°C. The device operates within a specified commercial temperature range of 0°C to 70°C and draws a typical supply current of 35µA. It features a shutdown pin for power management, thermal limiting protection, and supports up to 50mA output drive current.

Voltage Reference Feature Summary

• Combines high accuracy and low drift with low supply current and high output drive capability
• Utilizes advanced curvature compensation techniques 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 ordering suffix #TRPBF confirms tape and reel packaging rather than tube packaging when sourcing components. Confirm the 'A' grade designation matches the required ±0.04% accuracy and 3ppm/°C temperature coefficient specifications for the target application environment. Ensure the commercial temperature range of 0°C to 70°C aligns with operational requirements.

Voltage Reference Selection Notes

Select this component for applications requiring high precision with minimal power consumption. The low dropout voltage ensures extended battery life in portable devices while maintaining full reference performance. The high output drive capability makes it suitable for driving higher power loads or precision regulators without external buffering.

Voltage Reference Part Context

This part belongs to the LT1461 family of micropower precision low dropout series voltage references. The family offers various output voltage options including 2.5V, 3V, 3.3V, 4.096V, and 5V. Different grades (A, B, C) provide varying levels of accuracy and temperature stability to suit diverse precision requirements.

Voltage Reference Replacement Considerations

LT1461BCS8-5#TRPBF

Voltage Reference FAQ

What is the function of Pin 3 on the LT1461?

Pin 3 is the Shutdown (SHDN) pin. Driving this pin low shuts off the load current, reducing supply current to a maximum of 35µA. The device operates normally when this pin is open or greater than or equal to 2.4V.

How does the LT1461 handle thermal overload?

The device includes thermal shutdown protection that limits the junction temperature to around 150°C. If the junction temperature exceeds this limit due to high power dissipation, the thermal shutdown will turn the part off to prevent damage.