LTC6655CHMS8-3#PBF

Overview

The Analog Devices LTC6655CHMS8-3#PBF is a precision bandgap voltage reference delivering a fixed 3V output. It features an initial accuracy of ±0.05% and a maximum temperature coefficient of 5ppm/°C. The device operates within a supply range from VOUT + 0.5V to 13.2V, with a typical supply current of 7mA and shutdown current under 20µA. It provides ±5mA source/sink capability and load regulation better than 15ppm/mA. Packaged in an 8-lead MSOP, it functions across –40°C to 125°C.

Feature Summary

• Advanced curvature compensation ensures low drift and high accuracy without calibration.
• Capable of sourcing and sinking up to ±5mA for robust load handling.
• Includes a dedicated shutdown mode to minimize power consumption.
• Operates with a minimum dropout voltage of 500mV.

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the CH grade designation matches the required 0.05% accuracy and 5ppm/°C drift specifications. Ensure the MSOP-8 package footprint aligns with the design layout. Check for any recent product change notifications that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this part when a stable 3V reference is needed with moderate drift requirements. The CH grade offers a balance between cost and performance compared to higher grades. Consider the 500mV dropout requirement against available supply headroom. Verify that the 7mA operating current fits the system power budget. Evaluate thermal management needs given the 300°C/W junction-to-ambient rating in the MSOP package.

Part Context

This component belongs to the LTC6655 family of precision references, designed for demanding automotive and industrial environments. It shares architectural similarities with the LTC6652 but offers superior noise and drift performance. The family supports various output voltages and packages, including hermetic LS8 options for enhanced stability.

Replacement Considerations

LTC6655BHMS8-3#PBF (B Grade)

FAQ

How does the SHDN pin behave if left unconnected?

An internal pull-up resistor ties the SHDN pin to VIN, placing the device in normal operation. External connection high is recommended to prevent accidental shutdown.

What is the effect of the VOUT_S pin current?

The VOUT_S pin sinks 2mA. This creates an error voltage equal to the trace resistance multiplied by 2mA. For loads under 100µA, tie VOUT_S directly to VOUT_F.