LM336Z-2.5#PBF

Overview

The LM336Z-2.5#PBF is a two-terminal shunt voltage reference diode manufactured by Analog Devices Inc., housed in a 3-lead plastic TO-92 package. It provides a nominal reverse breakdown voltage of 2.49V at an operating current of 1mA, with a guaranteed range of 2.39V to 2.59V for the standard grade. The device features a maximum dynamic impedance of 0.6Ω and temperature stability of 18mV over its operating range. It operates within a temperature range of 0°C to 70°C.

Feature Summary

• Adjustable third terminal allows minimization of temperature coefficient or adjustment of reference voltage without altering temperature stability.
• Operates as a shunt regulator suitable for use as either a positive or negative reference source.
• Maintains good stability over time and across a wide operating current range.

Applications

• Reference for 5V systems
• 8-bit A/D and D/A converter references
• Digital voltmeters
• Current loop measurement and control systems
• Power supply monitors

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific Z package variant matches design requirements. Review datasheet specifications for absolute maximum ratings and thermal characteristics before integration. Ensure ordering suffixes align with exact performance grades needed for the application.

Selection Notes

Select this component when a general-purpose, low-cost shunt reference is required for moderate precision applications. The adjustable terminal offers flexibility for optimizing temperature coefficients. Consider the LT1009 if lower initial tolerance and tighter temperature coefficients are necessary for more demanding precision requirements.

Part Context

This part belongs to the LM136/LM336 family of shunt regulators. The LM336 series represents the commercial grade version, while the LM136 covers the military/extended temperature range. Both utilize similar internal architectures but differ in specified operating temperatures and initial voltage tolerances.

Replacement Considerations

The LT1009 is documented as a pin-for-pin replacement offering improved precision with lower initial tolerance and temperature coefficients. Verify compatibility regarding package type and electrical specifications when substituting.

FAQ

How does the third terminal function on the LM336Z-2.5?

The third terminal allows the user to adjust the reference voltage or minimize the temperature coefficient without changing the inherent temperature stability of the device.

Can the LM336Z-2.5 be used as a negative reference?

Yes, because it operates as a shunt regulator, it can be configured equally well as a positive or negative reference source.