Overview
The TL431CDR2, produced by onsemi, is a three-terminal programmable shunt regulator diode. This monolithic IC voltage reference operates as a low temperature coefficient zener that can be programmed from 2.5 V to 36 V using two external resistors. It is designed to offer a stable voltage reference with a wide operating current range of 1.0 mA to 100 mA and a typical dynamic impedance of 0.22 Ω. This device is suitable for various applications, including digital voltmeters, power supplies, and op-amp circuitry, making it an excellent replacement for traditional zener diodes.
Key Specifications
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Reference Input Voltage | Vref | 2.44 - 2.495 | V |
| Voltage Reference Tolerance | ±0.4% (Typ @ 25°C for TL431B) | % | |
| Dynamic Output Impedance | |ZKA| | 0.22 Ω (Typical) | Ω |
| Sink Current Capability | IK | 1.0 mA to 100 mA | mA |
| Temperature Coefficient | 50 ppm/°C (Typical) | ppm/°C | |
| Cathode to Anode Voltage | VKA | 37 V | V |
| Operating Junction Temperature | TJ | 150 °C | °C |
| Operating Ambient Temperature Range | TA | -40 to 125 °C | °C |
Key Features
- Programmable Output Voltage to 36 V
- Low Dynamic Output Impedance of 0.22 Ω Typical
- Sink Current Capability of 1.0 mA to 100 mA
- Equivalent Full-Range Temperature Coefficient of 50 ppm/°C Typical
- Temperature Compensated for Operation over Full Rated Operating Temperature Range
- Low Output Noise Voltage
- Pb-Free Packages Available
Applications
- Digital Voltmeters
- Power Supplies
- Op-Amp Circuitry
- Any application requiring a stable and programmable voltage reference
Q & A
- What is the TL431CDR2?
The TL431CDR2 is a three-terminal programmable shunt regulator diode produced by onsemi.
- What is the programmable output voltage range of the TL431CDR2?
The output voltage can be programmed from 2.5 V to 36 V using two external resistors.
- What is the typical dynamic impedance of the TL431CDR2?
The typical dynamic impedance is 0.22 Ω.
- What is the sink current capability of the TL431CDR2?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431CDR2?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
- What are the operating temperature ranges for the TL431CDR2?
The operating ambient temperature range is -40 to 125 °C.
- Can the TL431CDR2 be used as a positive or negative voltage reference?
Yes, it can be used as either a positive or negative voltage reference.
- What are some common applications for the TL431CDR2?
Common applications include digital voltmeters, power supplies, and op-amp circuitry.
- Is the TL431CDR2 available in Pb-Free packages?
Yes, Pb-Free packages are available.
- What is the maximum cathode to anode voltage for the TL431CDR2?
The maximum cathode to anode voltage is 37 V.
