Overview
The TL431ACDR2G is a programmable precision shunt regulator diode produced by onsemi. This integrated circuit operates as a three-terminal voltage reference, offering a wide range of programmable output voltages from the internal 2.5 V reference up to 36 V using two external resistors. It is designed to replace zener diodes in various applications due to its low temperature coefficient and stable voltage reference capabilities.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Cathode to Anode Voltage | VKA | V | - | - | 37 |
| Cathode Current Range, Continuous | IK | mA | -100 | - | 150 |
| Reference Input Current Range, Continuous | Iref | mA | -0.05 | - | 10 |
| Operating Junction Temperature | TJ | °C | - | - | 150 |
| Dynamic Impedance | |ZKA| | Ω | 0.22 | - | 0.5 |
| Thermal Resistance, Junction-to-Ambient | RθJA | °C/W | 178 | - | - |
Key Features
- Programmable Output Voltage to 36 V using two external resistors.
- Voltage Reference Tolerance: ±0.4% typical at 25°C (TL431B).
- Low Dynamic Output Impedance: 0.22 Ω typical.
- Sink Current Capability: 1.0 mA to 100 mA.
- Equivalent Full-Range Temperature Coefficient: 50 ppm/°C typical.
- Can be used as either a positive or negative voltage reference.
Applications
- Digital voltmeters.
- Power supplies.
- Op amp circuitry.
- Replacement for zener diodes in various applications.
Q & A
- What is the TL431ACDR2G used for?
The TL431ACDR2G is used as a programmable precision shunt regulator diode, providing a stable voltage reference in various applications.
- What is the range of programmable output voltage for the TL431ACDR2G?
The TL431ACDR2G can be programmed to output voltages from the internal 2.5 V reference up to 36 V using two external resistors.
- What is the typical dynamic impedance of the TL431ACDR2G?
The typical dynamic impedance of the TL431ACDR2G is 0.22 Ω.
- What is the operating current range of the TL431ACDR2G?
The TL431ACDR2G operates within a current range of 1.0 mA to 100 mA.
- What is the maximum cathode to anode voltage for the TL431ACDR2G?
The maximum cathode to anode voltage (VKA) for the TL431ACDR2G is 37 V.
- What is the typical temperature coefficient of the TL431ACDR2G?
The equivalent full-range temperature coefficient of the TL431ACDR2G is 50 ppm/°C typical.
- Can the TL431ACDR2G be used as a negative voltage reference?
Yes, the TL431ACDR2G can be used as either a positive or negative voltage reference.
- What are some common applications of the TL431ACDR2G?
Common applications include digital voltmeters, power supplies, and op amp circuitry.
- What is the maximum operating junction temperature for the TL431ACDR2G?
The maximum operating junction temperature (TJ) for the TL431ACDR2G is 150°C.
- How does the TL431ACDR2G compare to zener diodes?
The TL431ACDR2G is designed to replace zener diodes in many applications due to its stable voltage reference and low temperature coefficient.
