LT6658BIDE-3.3#PBF

Overview

The LT6658BIDE-3.3#PBF is a precision dual output voltage reference from Analog Devices, featuring a fixed 3.3V output per channel in a 16-lead DFN package. It combines reference and regulator performance with B-grade specifications: ±0.1% initial accuracy and 20ppm/°C temperature coefficient. Output 1 supports up to 150mA sourcing current, while Output 2 provides up to 50mA. The device operates within a -40°C to +85°C range, accepts input voltages up to 36V, and includes thermal shutdown protection.

Feature Summary

• Dual independent outputs with identical precision specifications that track each other over temperature and load variations
• High current capability allowing Output 1 to source 150mA and Output 2 to source 50mA for driving heavy loads
• Kelvin sense connections on outputs to achieve low load regulation by eliminating trace resistance errors
• Separate supply pins (VIN1, VIN2) for each output to enable power consumption reduction and buffer isolation

Applications

• Microcontroller or FPGA systems requiring integrated ADC/DAC reference supplies
• Data acquisition systems demanding high precision and low noise references
• Automotive control and monitoring circuits
• Precision instrumentation and process control equipment

Procurement Notes

Verify the specific suffix #PBF indicates RoHS compliance when ordering. Confirm the package type corresponds to the DFN variant rather than MSOP. Ensure the design accounts for the specified thermal management requirements associated with the exposed pad ground connection during implementation.

Selection Notes

Select this part for applications requiring two synchronized voltage rails with high current drive capabilities. The B-grade offers standard precision suitable for general high-resolution data conversion. Consider the A-grade if tighter accuracy is needed, or H-grade for extended temperature ranges beyond 85°C.

Part Context

This component belongs to the LT6658 family of Refulator devices, which merge voltage reference stability with linear regulator current drive. The family includes various voltage options and grades (A, B, I, H) across MSOP and DFN packages, providing flexibility for different precision and thermal requirements in mixed-signal designs.

Replacement Considerations

LT6658AIMSE-3.3#PBF

FAQ

Can the output voltage be adjusted?

Yes, although the part number specifies a fixed 3.3V output, the datasheet notes that outputs can be configured with external resistors to provide an output voltage up to 6V.

What is the maximum input voltage?

The absolute maximum rating for supply voltages (VIN, VIN1, VIN2) is 38V, though the specified operating range extends up to 36V.