LT1461AIS8-4#PBF

Voltage Reference Overview

The LT1461AIS8-4#PBF is a micropower precision low dropout series voltage reference from Analog Devices, housed in an 8-lead plastic SO package. It provides a fixed 4V output with an initial accuracy of ±0.04% and a maximum temperature coefficient of 3ppm/°C. The device operates within a specified temperature range of –40°C to 85°C, drawing a typical supply current of 35µA with a maximum of 50µA. It supports a minimum output drive current of 50mA and features a shutdown pin for power management.

Voltage Reference Feature Summary

• Advanced curvature compensation techniques ensure low temperature drift and high output accuracy.
• Integrated shutdown feature allows switching full load currents and enables system power down modes.
• Built-in thermal limiting protects the component from overload conditions during operation.

Voltage Reference Applications

• A/D and D/A Converters
• Precision Regulators
• Handheld Instruments

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging when sourcing. Confirm the AIS8 designation corresponds to the industrial temperature grade of –40°C to 85°C. Ensure compatibility with 8-lead SOIC footprints during PCB layout. Check for any automotive-specific variants if AEC-Q100 qualification is required for the target application environment.

Voltage Reference Selection Notes

Select this part for applications requiring high precision (±0.04%) and low drift (3ppm/°C) in industrial environments. The 4V output option suits systems needing intermediate reference levels without external scaling. Consider the 50mA drive capability for driving moderate loads directly. Evaluate board stress mitigation techniques, such as slotting, to maintain long-term accuracy given the surface mount package sensitivity.

Voltage Reference Part Context

This component belongs to the LT1461 family of micropower precision references. The AIS8 variant specifically denotes the industrial temperature range extension compared to commercial grades. It shares architectural similarities with other members like the LT1461ACS8-4#PBF but offers wider operational temperature tolerance suitable for demanding industrial settings.

Voltage Reference Replacement Considerations

LT1461BIS8-4#PBF offers slightly lower accuracy (±0.06%) and higher drift (7ppm/°C). LT1461CCS8-4#PBF provides commercial grade performance. Direct substitutes must match the 4V output and 8-lead SOIC package constraints while verifying temperature range requirements.