Overview
The LM336Z25 integrated circuit, produced by Fairchild Semiconductor, is a precision 2.5 V shunt regulator. This monolithic IC voltage reference operates as a low temperature coefficient 2.5 V Zener with a dynamic impedance of 0.2 Ω. The device features a third terminal that allows the reference voltage and temperature coefficient to be trimmed, making it highly versatile for various applications. It is particularly useful as a precision 2.5 V low-voltage reference for digital voltmeters, power supplies, or OP-AMP circuitry, and its 2.5 V output makes it convenient to obtain a stable reference from low-voltage supplies. The LM336Z25 can be used as either a positive or negative voltage reference due to its shunt regulator operation.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Reverse Breakdown Voltage (VR) | TA = 25°C, IR = 1 mA | 2.44 | 2.49 | 2.54 | V |
| Reverse Dynamic Impedance (ZD) | TA = 25°C, IR = 1 mA | 0.2 | 1.0 | Ω | |
| Temperature Stability (STT) | IR = 1 mA | 1.8 | 6.0 | mV | |
| Long Term Stability in Reference Voltage (ST) | IR = 1 mA | 20.0 | ppm/Khr | ||
| Reverse Current (IR) | 15 | mA | |||
| Forward Current (IF) | 10 | mA | |||
| Operating Temperature Range (TOPR) | 0 | 70 | °C | ||
| Storage Temperature Range (TSTG) | -60 | 150 | °C |
Key Features
- Low-Temperature Coefficient: Ensures stable operation over a range of temperatures.
- Guaranteed Temperature Stability: Typical temperature stability of 4 mV.
- Dynamic Impedance: 0.2 Ω dynamic impedance at 25°C and 1 mA current.
- Initial Tolerance: Available with 1.0% initial tolerance.
- Trimming Capability: The third terminal allows for trimming the reference voltage and temperature coefficient for minimum temperature drift.
Applications
- Digital Voltmeters: Provides a precise voltage reference for accurate measurements.
- Power Supplies: Used as a stable voltage reference in power supply circuits.
- OP-AMP Circuitry: Serves as a reliable voltage reference in operational amplifier circuits.
- General Voltage Reference: Suitable for any application requiring a stable 2.5 V voltage reference.
Q & A
- What is the primary function of the LM336Z25?
The LM336Z25 is a precision 2.5 V shunt regulator that operates as a low temperature coefficient voltage reference.
- What is the typical temperature stability of the LM336Z25?
The typical temperature stability is 4 mV.
- What is the dynamic impedance of the LM336Z25 at 25°C and 1 mA current?
The dynamic impedance is 0.2 Ω.
- Can the LM336Z25 be trimmed for better performance?
- What are the typical applications of the LM336Z25?
It is commonly used in digital voltmeters, power supplies, and OP-AMP circuitry.
- What is the operating temperature range of the LM336Z25?
The operating temperature range is from 0°C to +70°C.
- What is the storage temperature range of the LM336Z25?
The storage temperature range is from -60°C to +150°C.
- What is the maximum reverse current of the LM336Z25?
The maximum reverse current is 15 mA.
- What is the maximum forward current of the LM336Z25?
The maximum forward current is 10 mA.
- In what package types is the LM336Z25 available?
The LM336Z25 is available in TO-92 packages, either in bulk or on tape and reel.
