LTC6655BHMS8-2.048#PBF

Voltage Reference Overview

The LTC6655BHMS8-2.048#PBF is a precision bandgap voltage reference delivering a fixed 2.048V output with an initial accuracy of ±0.025% and a maximum temperature coefficient of 2ppm/°C. It operates within a –40°C to 125°C range, featuring low dropout capability starting at 500mV above the output voltage and supporting a maximum supply voltage of 13.2V. The device provides bidirectional current sourcing and sinking of ±5mA, ensuring stable performance under varying load conditions. It includes a shutdown mode consuming less than 20µA and is housed in an 8-lead plastic MSOP package.

Voltage Reference Feature Summary

• Advanced curvature compensation ensures predictable temperature characteristics and high accuracy without requiring calibration.
• Bidirectional load regulation allows both sourcing and sinking of current for consistent performance across wide operating conditions.
• Low power shutdown mode significantly reduces consumption for energy-efficient system designs.

Voltage Reference Applications

• Instrumentation and test equipment
• High resolution data acquisition systems
• Precision battery monitors

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tape/reel availability if required. Confirm the 'B' grade designation corresponds to the ±0.025% initial accuracy and 2ppm/°C drift specifications. Ensure the MS8 package type matches the PCB footprint requirements. Check that the operating temperature range aligns with the intended application environment.

Voltage Reference Selection Notes

Select this part when precise 2.048V reference is needed with minimal drift over temperature. Consider the MSOP package for standard surface mount assembly. Evaluate the need for shutdown functionality versus continuous operation. Compare against lower accuracy grades if cost is a primary constraint, noting that the 'C' grade offers 0.05% accuracy.

Voltage Reference Part Context

This component belongs to the LTC6655 family of precision voltage references designed for high-resolution measurements. The family includes various output voltages and packages, such as the hermetic LS8 option. The BHMS8 variant specifically denotes the B-grade accuracy level in the 8-lead MSOP plastic package, distinguishing it from the C-grade or low-noise LN variants.

Voltage Reference Replacement Considerations

LTC6655CHMS8-2.048#PBF

Voltage Reference FAQ

What is the minimum input voltage required for proper operation?

The device requires a minimum dropout voltage of 500mV above the output voltage, meaning VIN must be at least VOUT + 0.5V.

How does the shutdown pin function?

Tying the SHDN pin to ground activates shutdown mode, reducing supply current to less than 20µA. An internal pull-up enables normal operation if left unconnected, though external pulling high is recommended.