LT6658BHDE-2.5#PBF

Overview

The LT6658BHDE-2.5#PBF is a precision dual output voltage reference from Analog Devices, operating at a fixed 2.5V output with B-grade initial accuracy of ±0.1% and a maximum temperature coefficient of 20ppm/°C. It features Output 1 capable of sourcing up to 150mA and sinking 20mA, while Output 2 sources 50mA and sinks 20mA. 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 DFN (4mm × 3mm) with an exposed thermal pad, it includes Kelvin sense connections for high load regulation.

Feature Summary

• Combines precision voltage reference performance with linear regulator capabilities for heavy loading applications
• Provides two independent outputs that track each other over temperature and load variations
• Features separate supply pins for each output to reduce power consumption and isolate buffer amplifiers
• Includes thermal shutdown protection and short circuit prevention mechanisms

Applications

• Microcontroller or FPGA systems with integrated ADC/DAC components
• Data acquisition systems requiring stable reference inputs
• Automotive control and monitoring circuits
• Precision low noise regulators
• Instrumentation and process control equipment

Procurement Notes

Verify the specific suffix DE indicates the DFN package configuration and BHDE denotes the B-grade temperature rating (-40°C to +125°C). Confirm RoHS compliance status via official documentation. Ensure the ordering part number matches the required output voltage option of 2.5V. Check for any specific tape and reel availability if automated assembly is required.

Selection Notes

Select this component when dual tracking references are needed for simultaneous ADC/DAC powering and microcontroller supply. The B-grade specification offers a balance of cost and performance with 20ppm/°C drift. Consider the DFN package for thermal management requirements and space constraints. Verify input voltage headroom meets the minimum dropout requirements for the intended load currents.

Part Context

This device belongs to the LT6658 family of Refulators, which merge reference and regulator functions. Other variants include MSOP packages and different voltage options like 1.2V, 1.8V, 3V, 3.3V, and 5V. A-grade versions offer tighter specifications such as 10ppm/°C drift and 0.05% accuracy. The family supports adjustable outputs up to 6V using external resistors.

Replacement Considerations

LT6658AHDE-2.5#PBF (A-grade, same package)

FAQ

Can the output voltage be adjusted?

Yes, each output can be configured with external resistors to provide an output voltage up to 6V.

What is the purpose of the OD pin?

The OD pin allows for shutdown functionality to reduce power consumption when the device is not in use.