LT6658BIMSE-1.2#PBF

Overview

The LT6658BIMSE-1.2#PBF is a precision dual output voltage reference from Analog Devices, operating at a fixed 1.2V output with B-grade specifications. It features an initial accuracy of ±0.1% and a temperature coefficient of 20ppm/°C over the -40°C to +85°C range. The device integrates two independent outputs: Output 1 supports up to 150mA sourcing current, while Output 2 provides up to 50mA. It utilizes Kelvin sense connections for high load regulation and includes separate supply pins (VIN1, VIN2) for each output to optimize power consumption and isolation.

Feature Summary

• Combines precision voltage reference performance with linear regulator capabilities in a single IC
• Provides two independent outputs that track each other over temperature and load variations
• Features Kelvin sense connections on outputs to minimize load regulation errors
• Includes thermal shutdown protection and short-circuit protection mechanisms

Applications

• Driving precision reference inputs of high resolution ADCs and DACs under heavy loading
• Powering microcontrollers and supporting circuitry simultaneously with analog references
• Dual output tracking reference systems requiring matched voltage rails
• Data acquisition systems requiring low drift and low noise voltage supplies

Procurement Notes

Verify the specific suffix #PBF indicates RoHS and WEEE compliance when ordering. Confirm the package type matches the design requirements, as this part uses the 16-lead MSOP format. Ensure the B-grade specification meets the system's accuracy needs, as A-grade variants offer tighter tolerances. Check for availability in tube packaging versus tape and reel options if automated assembly is required.

Selection Notes

Select this component when dual isolated or tracked supplies are needed from a single reference source. The B-grade offers a balance of cost and performance for general precision applications. Consider the separate supply pins if reducing cross-regulation between the reference and digital loads is critical. Verify input voltage headroom requirements against the dropout characteristics for the chosen load currents.

Part Context

This part belongs to the LT6658 family of Refulator devices, which merge reference and regulator functions. Other variants in the series include different fixed voltages such as 1.8V, 2.5V, and 3.3V, as well as adjustable configurations. The family is available in both MSOP and DFN packages with varying temperature grades (I and H) and accuracy grades (A and B).

Replacement Considerations

LT6658AIMSE-1.2#PBF offers higher accuracy (±0.05%) and lower drift (10ppm/°C) with identical pinout and functionality.