LTC6655LNBHMS8-2.5#TRPBF

Overview

The LTC6655LNBHMS8-2.5#TRPBF is a precision bandgap voltage reference from Analog Devices, featuring low noise and drift characteristics suitable for high-resolution measurements. It provides a fixed 2.5V output with an initial accuracy of ±0.025% and a maximum temperature coefficient of 2ppm/°C. The device operates within a supply voltage range of 3V to 13.2V and draws a typical supply current of 7.5mA. It includes a shutdown mode consuming less than 20µA and supports sourcing and sinking currents up to ±5mA.

Feature Summary

• Low Noise: Features a dedicated noise reduction pin that enables wideband noise reduction with a single external capacitor.
• High Accuracy: Achieves exceptional drift performance with advanced curvature compensation, reducing or eliminating the need for calibration.
• Shutdown Mode: Includes a logic-controlled shutdown function for low-power applications, minimizing quiescent current when inactive.

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when placing orders. Confirm the 'LN' designation corresponds to the low noise variant with the noise reduction pin functionality. Ensure compatibility with the 8-lead MSOP package dimensions for PCB layout. Check for any recent product change notifications regarding material or manufacturing site updates.

Selection Notes

Select this component for applications requiring superior low-frequency noise performance compared to standard references. The inclusion of the noise reduction pin allows for further optimization of spectral noise density using external capacitance. Consider the thermal hysteresis specifications if the application involves significant temperature cycling. Verify that the required output current does not exceed the ±5mA sourcing/sinking capability.

Part Context

This part belongs to the LTC6655 family of precision voltage references, which are designed for demanding automotive and industrial environments. The family offers various output voltages and packages, including hermetic LS8 options. The LTC6655LN variant specifically targets ultra-low noise requirements, distinguishing itself from the standard LTC6655 through its enhanced noise performance capabilities.

Replacement Considerations

LTC6655BHMS8-2.5#TRPBF

FAQ

How is the noise reduction feature implemented on the LTC6655LN?

The LTC6655LN includes a dedicated NR (Noise Reduction) pin. Connecting a capacitor between this pin and ground band-limits the noise, significantly reducing wideband noise levels.

What is the minimum operating voltage for the 2.5V output version?

For the LTC6655-2.5, the minimum operating voltage is 3V when sourcing 5mA with an output error of ≤ 0.1%. This is determined by internal circuitry requirements rather than just the dropout voltage.