Overview
The TL431AIDR2 is a programmable shunt voltage reference integrated circuit produced by onsemi. This device is part of the TL431 series, known for its versatility and precision in voltage regulation. The TL431AIDR2 operates as a low temperature coefficient zener diode, which can be programmed to output voltages from 2.5 V to 36 V using two external resistors. It is designed to offer a wide operating current range of 1.0 mA to 100 mA and features a low dynamic output impedance of 0.22 Ω typical. This makes it an excellent replacement for traditional zener diodes in various applications, including digital voltmeters, power supplies, and op-amp circuitry.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | 2.44 | 2.495 | 2.55 | V |
| Voltage Reference Tolerance (TL431B) | ±0.4% | % @ 25°C | ||
| Dynamic Output Impedance | 0.22 | 0.5 | Ω | |
| Sink Current Capability | 1.0 | 100 | mA | |
| Operating Temperature Range | -40 | 125 | °C | |
| Cathode to Anode Voltage (VKA) | 37 | V | ||
| Package Type | 8-SOIC |
Key Features
- Programmable output voltage from 2.5 V to 36 V using two external resistors.
- Voltage reference tolerance of ±0.4% typical at 25°C for the TL431B version.
- Low dynamic output impedance of 0.22 Ω typical.
- Sink current capability from 1.0 mA to 100 mA.
- Equivalent full-range temperature coefficient of 50 ppm/°C typical.
- Temperature compensated for operation over the full rated operating temperature range.
- Low output noise voltage.
- Pb-free packages available.
Applications
- Digital voltmeters.
- Power supplies.
- Op-amp circuitry.
- Industrial and automotive applications due to its extended temperature range (-40°C to +125°C).
Q & A
- What is the programmable output voltage range of the TL431AIDR2?
The TL431AIDR2 can be programmed to output voltages from 2.5 V to 36 V using two external resistors.
- What is the typical voltage reference tolerance for the TL431B version?
The voltage reference tolerance for the TL431B version is ±0.4% at 25°C.
- What is the dynamic output impedance of the TL431AIDR2?
The dynamic output impedance is 0.22 Ω typical.
- What is the sink current capability of the TL431AIDR2?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the operating temperature range of the TL431AIDR2?
The operating temperature range is -40°C to +125°C.
- What types of applications is the TL431AIDR2 suitable for?
The TL431AIDR2 is suitable for digital voltmeters, power supplies, op-amp circuitry, and industrial and automotive applications.
- Is the TL431AIDR2 available in Pb-free packages?
- What is the package type of the TL431AIDR2?
The package type is 8-SOIC.
- What is the maximum cathode to anode voltage (VKA) for the TL431AIDR2?
The maximum cathode to anode voltage is 37 V.
- What is the temperature coefficient of the TL431AIDR2?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
