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Allegro Microsystems Through Hole Hall Effect Sensor 3 V 24V SIP 3-Pin A1121LUA-T
Specifications
| Country of Origin | India |
|---|---|
| Brand | Allegro Microsystems |
| Response time | 25μs |
| Height | 3.02mm |
| Length | 4.09mm |
| Model | A1121LUA-T |
| Technology | Chopper Stabilised, BiCMOS |
| Sensor Type | Hall Effect Sensors |
| Width | 1.52mm |
| Mount Type | Through Hole |
| Maximum Operating Temperature | 150°C |
| Package Type | SIP |
| Minimum Operating Temperature | -40°C |
| Standards/Approvals | AEC-Q100 |
| Pin Count | 3 |
| Automotive Standard | AEC-Q100 |
| Maximum Supply Voltage | 24V |
| Minimum Supply Voltage | 3V |
| Supply Current | 4mA |
| Magnetic Type | Unipolar |
| Maximum Frequency Response | 800kHz |
Key Features
- The sensor uses chopper stabilised BiCMOS technology for enhanced performance.
- It operates with a supply voltage between 3 V and 24 V.
- Through-hole SIP package with 3 pins allows easy PCB integration.
- Fast 25 microsecond response time supports high-frequency sensing up to 800kHz.
- Wide operating temperature range from -40°C to 150°C suitable for automotive use.
- Short circuit protected open-drain output capable of sinking 25 mA.
- Certified to automotive standard AEC-Q100 to guarantee reliability.
Product Description
Allegro Microsystems A1121LUA-T Through Hole Hall Effect Sensor is a temperature-stable, unipolar switch sensor IC designed using chopper stabilised BiCMOS technology. It supports a wide supply voltage range from 3 V to 24 V and includes built-in voltage regulator, Hall-voltage generator, and small-signal amplifier. The through-hole SIP package features 3 pins, facilitating mounting and integration into electronic circuits.
This sensor provides a rapid 25 microsecond response time, ideal for high-frequency magnetic sensing applications up to 800 kHz. Its robust design includes short circuit protected open-drain output capable of sinking 25 mA, ensuring long-term durability and reliability, particularly for automotive environments adhering to AEC-Q100 standards.
Operating temperature spans from -40°C to 150°C, making it suitable for industrial, automotive, environmental monitoring, and laboratory instrument uses. Compact physical dimensions (4.09 mm length, 1.52 mm width, and 3.02 mm height) ensure seamless fit in space-constrained assemblies. The sensor detects the presence of a south pole magnet to switch output on or off, depending on model variant.
This sensor is resistant to physical stress and temperature fluctuations due to dynamic offset cancellation technology. Operates from unregulated power supplies and offers stable unipolar switching characteristics. Its package type is Single Inline Package (SIP) with 3 pins suitable for through-hole PCB mounting.
Commonly used in automotive sensor assemblies, industrial motion detection, and electronic control systems. Certified under AEC-Q100 automotive standard for quality and reliability. Offered by Allegro Microsystems with part number A1121LUA-T for identification and ordering.
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Frequently Asked Questions
This model operates with a supply voltage between 3 V and 24 V.
It supports a maximum frequency response of up to 800 kHz.
The response time of this sensor is 25 microseconds.
The sensor has a length of 4.09 mm, width of 1.52 mm, and height of 3.02 mm.
It operates within a temperature range from -40°C to 150°C.
It features a short circuit protected open-drain output capable of sinking 25 mA.
This sensor is designed for through-hole mounting with a SIP package.
It is certified to the automotive standard AEC-Q100, ensuring reliability for automotive applications.
This model utilizes chopper stabilised BiCMOS technology for enhanced performance.
The sensor features a 3-pin configuration.
It is a unipolar sensor that detects the presence of a south pole magnet to switch the output on or off.
The supply current required for this sensor is 4 mA.
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