LT6657BHMS8-1.25#PBF

Voltage Reference Overview

The LT6657BHMS8-1.25#PBF is a precision buffered voltage reference delivering a fixed 1.25V output with an initial accuracy of ±0.1%. It features a maximum temperature coefficient of 3ppm/°C and operates over a –40°C to 125°C range. The device supports a supply voltage up to 40V with a minimum dropout of 50mV. It provides ±10mA drive capability, low noise (0.5ppm P-P), and includes reverse polarity protection, thermal shutdown, and a low-power shutdown mode.

Voltage Reference Feature Summary

• Advanced curvature compensation ensures predictable temperature behavior and extremely low drift.
• Buffered output stage enables high current sourcing and sinking with low output impedance.
• Integrated reverse supply and output protection safeguards against incorrect connections.
• Configurable shutdown pin allows for rapid turn-on and significant power reduction.

Voltage Reference Applications

• High resolution data acquisition systems
• Instrumentation and process control
• Automotive control and monitoring
• Medical equipment
• Shunt and negative voltage references

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates RoHS compliance when ordering. Confirm the B grade designation matches the required 3ppm/°C temperature coefficient specification. Ensure the MSOP-8 package dimensions align with the target PCB footprint constraints. Validate that the 1.25V output option meets the system's reference voltage requirements.

Voltage Reference Selection Notes

Select this component for applications requiring robust operation under reverse battery conditions or short-circuit scenarios. The buffered architecture simplifies design by eliminating the need for external amplifiers. Consider the low dropout characteristic for systems with tight input-to-output voltage margins. Evaluate the shutdown functionality if power management during idle states is critical.

Voltage Reference Part Context

This part belongs to the LT6657 family of precision voltage references from Analog Devices. The family combines bandgap technology with advanced curvature compensation to achieve superior stability. Other variants in the series offer different output voltages such as 2.5V, 3V, 4.096V, and 5V, sharing similar performance characteristics and packaging options.

Voltage Reference Replacement Considerations

LT6657AHMS8-1.25#PBF offers improved drift specifications at 1.5ppm/°C while maintaining identical pinout and form factor.