LT1461ACS8-4#PBF

Voltage Reference Overview

The LT1461ACS8-4#PBF is a micropower precision low dropout series voltage reference manufactured by Analog Devices Inc. It provides a fixed output voltage of 4.096V 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 full load current switching
• Provides 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 #PBF indicates lead-free finish and tube packaging when ordering. Confirm the ACS8 grade corresponds to the required 0.04% accuracy and 3ppm/°C temperature coefficient specifications. Ensure the commercial temperature range (0°C to 70°C) meets the application requirements rather than industrial or automotive grades.

Voltage Reference Selection Notes

Select this component for applications requiring precise voltage references with minimal power consumption. The low dropout voltage ensures efficiency in battery-powered systems. Consider the 50mA output drive capability if driving moderate loads directly. Verify that the SOIC-8 package orientation and board layout strategies are implemented to minimize mechanical stress effects on long-term stability.

Voltage Reference Part Context

This part belongs to the LT1461 family of micropower precision low dropout series voltage references. The family offers various output voltages including 2.5V, 3V, 3.3V, 4.096V, and 5V. Different letter codes denote varying accuracy and temperature coefficient grades, with the 'A' grade representing the highest precision tier in the commercial range.

Voltage Reference Replacement Considerations

LT1461BCS8-4#PBF

Voltage Reference FAQ

What is the function of Pin 3?

Pin 3 is the Shutdown (SHDN) pin. Driving it low shuts off the load current, while leaving it open or above 2.4V allows normal operation.

How does the LT1461 handle thermal overload?

The device includes thermal limiting and thermal shutdown features that protect the part from overload conditions by limiting junction temperature.