LT6658AHDE-2.5#TRPBF

Overview

The LT6658AHDE-2.5#TRPBF is a precision dual output voltage reference from Analog Devices, operating at a fixed 2.5V output. It features an A-grade initial accuracy of ±0.05% and a maximum temperature coefficient of 10ppm/°C. The device operates within a junction temperature range of -40°C to 125°C and utilizes a 16-lead (4mm × 3mm) plastic DFN package with an exposed pad. Output 1 supports sourcing up to 150mA and sinking 20mA, while Output 2 supports sourcing up to 50mA and sinking 20mA. It accepts input voltages up to 36V.

Feature Summary

• Combines low drift, low noise reference performance with linear regulator capabilities for high current drive.
• Features separate supply pins for each output to reduce power consumption and isolate buffer amplifiers.
• Includes Kelvin sense connections on outputs for precise load regulation and thermal shutdown protection.

Applications

• Microcontroller or FPGA systems with integrated ADC/DAC
• Dual output tracking reference circuits
• Data acquisition systems requiring high precision
• Precision low noise regulators

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the AHDE designation corresponds to the H-grade extended temperature range (-40°C to 125°C) and the DE package type (16-lead DFN). Ensure compatibility with PCB footprint requirements for the 4mm × 3mm DFN form factor and exposed pad soldering.

Selection Notes

Select this part for applications requiring simultaneous high-current buffering and ultra-low noise voltage referencing. The H-grade variant is suitable for environments exceeding standard industrial temperatures. Consider the separate VIN1/VIN2 pins if independent power domain isolation is required to minimize cross-talk between the two outputs.

Part Context

This component belongs to the LT6658 family of Refulators™, which merge precision reference and linear regulator technologies. The AHDE-2.5 variant specifically denotes the H-grade temperature rating, DFN package, and 2.5V fixed output. It serves as a robust power management solution for sensitive analog front-ends in mixed-signal systems.

Replacement Considerations

LT6658BHDE-2.5#TRPBF offers B-grade specifications (±0.1% accuracy, 20ppm/°C TC) with identical pinout and package.

FAQ

Can the output voltage be adjusted?

No, the LT6658AHDE-2.5 has a fixed internal output voltage of 2.5V. Other variants in the family allow adjustment via external resistors up to 6V.

What is the purpose of the OD pin?

The OD (Output Disable) pin allows the user to disable the outputs to reduce quiescent current consumption when the reference is not in use.