LT6658AHMSE-1.2#PBF

Overview

The LT6658AHMSE-1.2#PBF is a precision dual output voltage reference from Analog Devices, operating at a nominal 1.2V with an initial accuracy of ±0.05% and a maximum temperature coefficient of 10ppm/°C. It features Output 1 sourcing up to 150mA and Output 2 sourcing up to 50mA. The device operates within a junction temperature range of -40°C to 125°C and accepts input voltages up to 36V. Packaged in a 16-lead MSOP with an exposed thermal pad, it combines low drift and low noise performance with linear regulator capabilities.

Feature Summary

• Dual outputs track each other over temperature and load while maintaining identical precision specifications.
• Each output can be configured with external resistors to provide adjustable output voltages up to 6V.
• Separate supply pins allow for reduced power consumption and isolation of buffer amplifiers.
• Kelvin sense connections enable high load regulation performance under heavy loading conditions.

Applications

• Driving precision reference inputs of high resolution ADCs and DACs
• Powering microcontrollers and supporting circuitry simultaneously
• Automotive control and monitoring systems
• Data acquisition systems

Procurement Notes

Verify the specific suffix #PBF indicates RoHS compliance when ordering. Confirm the H-grade designation matches the required -40°C to 125°C operating temperature range for your application environment. Ensure the 16-lead MSOP package footprint aligns with your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when simultaneous high-current buffering and precision referencing are required. The A-grade offers tighter accuracy and drift specifications compared to B-grade options. Consider the separate VIN1/VIN2 pins if independent power domain isolation is necessary to minimize cross-talk between the reference and supply functions.

Part Context

This part belongs to the LT6658 family of Refulators, which merge voltage reference and linear regulator technologies. The AHMSE variant specifically denotes the Automotive/H-grade temperature rating and the MSOP package style. Other family members include different fixed voltages like 1.8V, 2.5V, and 3.3V, as well as DFN package options.

Replacement Considerations

LT6658AIMSE-1.2#PBF (I-grade, -40°C to 85°C)

FAQ

Can the outputs be adjusted to voltages higher than the internal 1.2V setting?

Yes, both outputs can be configured with external resistors to provide adjustable output voltages up to 6V.

What is the purpose of the separate VIN1 and VIN2 pins?

Separate supply pins provide an option to reduce overall power consumption and isolate the buffer amplifiers for each output channel.