LT1634BCS8-1.25#TRPBF

Voltage Reference Overview

The LT1634BCS8-1.25#TRPBF is a micropower precision shunt voltage reference manufactured by Analog Devices Inc., featuring a fixed output of 1.25V. It utilizes trimmed precision thin film resistors to achieve an initial voltage accuracy of ±0.05% and a maximum temperature coefficient of 25ppm/°C. The device operates within a commercial temperature range of 0°C to 70°C, drawing a minimum operating current of 7µA at 10µA reverse current. It is housed in an 8-lead plastic SO package and supplied in tape and reel format.

Voltage Reference Feature Summary

• Achieves high precision through the use of bandgap references with trimmed precision thin film resistors.
• Ensures stable performance across temperature variations via improved curvature correction techniques.
• Provides low dynamic impedance for easy integration with unregulated power supplies.
• Operates stably with capacitive loads without requiring external output compensation capacitors.

Voltage Reference Applications

• Portable meters
• Precision regulators
• A/D and D/A converters
• Calibrators

Voltage Reference Procurement Notes

Verify that the specific ordering suffix #TRPBF corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm that the BC grade designation aligns with the specified 0°C to 70°C commercial temperature range and 25ppm/°C drift characteristics. Ensure compatibility with standard surface mount soldering profiles for the 8-lead SO package.

Voltage Reference Selection Notes

Select this component when a fixed 1.25V reference is needed with strict initial accuracy requirements. The BC grade offers a balance of precision and cost for commercial applications. Consider the low operating current for battery-powered designs. Verify that the 8-lead SO package fits the available board space compared to MSOP or TO-92 alternatives.

Voltage Reference Part Context

This part belongs to the LT1634 family of micropower precision shunt voltage references. It serves as a high-performance upgrade to older references like the LM185/LM385, LT1004, and LT1034, offering lower power consumption and guaranteed temperature drift. The family includes various voltage options and packages to suit different design constraints.

Voltage Reference Replacement Considerations

LT1634BCMS8-1.25#TRPBF (MSOP package variant)

Voltage Reference FAQ

Does the LT1634 require an output compensation capacitor?

No, the LT1634 does not require an output compensation capacitor but remains stable with capacitive loads.

What technology is used to achieve the initial voltage accuracy?

The bandgap reference uses trimmed precision thin film resistors to achieve the specified initial voltage accuracy.