LT6658AIMSE-5#PBF

Overview

The LT6658AIMSE-5#PBF is a precision dual output voltage reference with an adjustable output voltage up to 6V, configured for 5V in this variant. It features A-grade accuracy of ±0.05% and a maximum temperature coefficient of 10ppm/°C. Output 1 provides 150mA sourcing and 20mA sinking current, while Output 2 provides 50mA sourcing and 20mA sinking. The device operates within a specified junction temperature range of –40°C to 85°C and accepts input voltages up to 36V. It utilizes Kelvin sense connections for load regulation and includes thermal shutdown protection.

Feature Summary

• Combines precision voltage reference performance with linear regulator capabilities for heavy loading applications
• Features separate supply pins for each output to reduce power consumption and isolate buffer amplifiers
• Includes a noise reduction pin to band-limit and lower total integrated noise
• Provides short circuit and thermal protection to prevent thermal overstress

Applications

• Dual output tracking reference systems
• Microcontroller or FPGA applications with ADC/DAC interfaces
• Data acquisition systems
• Precision low noise regulators

Procurement Notes

Verify the part number suffix #PBF indicates RoHS and WEEE compliance. Confirm the 'A' grade designation matches the required ±0.05% initial accuracy and 10ppm/°C temperature coefficient specifications. Ensure the MSOP package type aligns with the PCB footprint requirements. Check that the operating temperature range meets the application's environmental constraints.

Selection Notes

Select this component when high precision and high current drive are required simultaneously from two independent outputs. The A-grade specification ensures tighter tolerance bounds compared to B-grade options. Consider the separate VIN1 and VIN2 pins if independent power domains are needed for noise isolation. Verify that the 5V fixed output meets the system voltage requirements without external resistor adjustment.

Part Context

This component belongs to the LT6658 family of precision dual output references. It is available in multiple output voltage options including 1.2V, 1.8V, 2.5V, 3V, 3.3V, and 5V. The family offers both A-grade and B-grade accuracy levels and is housed in either a 16-lead MSOP or a 4mm × 3mm DFN package with an exposed pad for thermal management.

Replacement Considerations

LT6658BIMSE-5#PBF: Lower accuracy grade (±0.1%, 20ppm/°C).

FAQ

What is the maximum output voltage capability of the LT6658?

Each output can be configured with external resistors to provide an output voltage up to 6V.

How does the LT6658 handle load regulation?

It uses Kelvin connections to achieve typical load regulation of 0.1ppm/mA for Output 1 and 0.25µV/mA for Output 2 under specified conditions.