Overview
The TL1431AIYDT is an adjustable shunt voltage reference produced by STMicroelectronics. This device is known for its high precision and guaranteed temperature stability over a wide operating temperature range. It is particularly suited for applications requiring stable voltage references across various environmental conditions.
The TL1431AIYDT is part of the TL1431 family, which includes several variants with different temperature ranges and precision levels. This specific model, the TL1431AIYDT, is designed for automotive applications with an operating temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Cathode-to-anode voltage (VKA) | 2.5 to 36 | V |
| Continuous cathode current (Ik) | 1 to 100 | mA |
| Reference input voltage (Vref) | 2.490 to 2.510 | V |
| Reference input voltage deviation over temperature range (ΔVref) | 7 to 30 | mV |
| Temperature coefficient of reference input voltage | ±22 to ±100 | ppm/°C |
| Typical output impedance | 0.22 Ω | Ω |
| Operating free-air temperature range (Toper) | -40 to +125 | °C |
| Junction temperature (Tj) | +150 | °C |
| Power dissipation (Pd) | 960 mW (SO-8 batwing package) | mW |
| Storage temperature range (Tstg) | -65 to +150 | °C |
| ESD protection (HBM) | 2000 V | V |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between 2.5 V and 36 V using two external resistors.
- Sink Current Capability: Operates with a wide current range from 1 to 100 mA.
- High Precision: Offers 0.25% voltage precision, ensuring high accuracy in voltage referencing.
- Low Output Impedance: Typical output impedance of 0.22 Ω, which is beneficial for stable voltage output.
- Wide Operating Temperature Range: Suitable for automotive applications with an operating temperature range of -40°C to +125°C.
- Fast Turn-On Time: Fast turn-on time of approximately 500 ns.
- Low Reference Current: Low reference input current, which helps in power-efficient designs.
Applications
- Adjustable Voltage and Current Referencing: Ideal for applications requiring adjustable and precise voltage references.
- Secondary Side Regulation in Flyback SMPSs: Used in secondary side regulation in flyback Switch-Mode Power Supplies (SMPSs).
- Zener Replacement: Can replace Zener diodes in many applications due to its adjustable and stable voltage reference capabilities.
- Voltage Monitoring: Suitable for voltage monitoring circuits where precise voltage references are necessary.
- Comparator With Integrated Reference: Can be used in comparator circuits that require an integrated precise voltage reference.
Q & A
- What is the operating temperature range of the TL1431AIYDT?
The operating temperature range of the TL1431AIYDT is -40°C to +125°C, making it suitable for automotive applications.
- What is the adjustable output voltage range of the TL1431AIYDT?
The output voltage can be set to any value between 2.5 V and 36 V using two external resistors.
- What is the typical output impedance of the TL1431AIYDT?
The typical output impedance is 0.22 Ω.
- What is the sink current capability of the TL1431AIYDT?
The device can operate with a sink current range from 1 to 100 mA.
- What is the voltage precision of the TL1431AIYDT?
The TL1431AIYDT offers a voltage precision of 0.25%.
- What is the turn-on time of the TL1431AIYDT?
The turn-on time is approximately 500 ns.
- What are some common applications of the TL1431AIYDT?
Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring, and comparator circuits with integrated references.
- What is the junction temperature limit of the TL1431AIYDT?
The junction temperature limit is +150°C.
- What is the power dissipation of the TL1431AIYDT in the SO-8 batwing package?
The power dissipation is 960 mW for the SO-8 batwing package.
- Does the TL1431AIYDT have ESD protection?
Yes, it has ESD protection with a Human Body Model (HBM) rating of 2000 V.
