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Datasheets:
3134: Bipolar Hall-Effect Switch for High-Temperature Operation (PDF)
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Hall-Effect Sensor ICs,
Bipolar Hall-Effect Digital Switches
Technical Publications:
Bipolar Switch Hall-Effect ICs
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A1201/02/03/04: Allegro MicroSystems, Inc. Replaces Bipolar Switch Family for Improved Performace and Additional Packaging Options,
Hall-Effect Switch Circuits for High-Temperature Operation
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A3134
Bipolar Hall-Effect Switch for High-Temperature Operation
The A3134 has been phased out of production as of October 31, 2005, and has been replaced by the A1205 next-generation continuous-time bipolar switch.
For samples and information on the replacement part, please refer to the A1205.
Replacement Device Characteristics Table
| Device | A120x Characteristics | ||||||
|---|---|---|---|---|---|---|---|
| BOP | BRP | Hys | |||||
| Legacy | Replacement | Min | Max | Min | Max | Min | Max |
| UGx3132 | A1203 | - | 95 | -95 | - | 30 | - |
| UGx3133 | A1202 | - | 75 | -75 | - | 30 | - |
| A3134 | A1205 | -40 | 50 | -50 | 40 | 5 | 55 |
Features
- Superior Temperature Stability
- Operation From Unregulated Supply
- Open-Collector 25 mA Output
- Reverse Battery Protection
- Activate With Small, Commercially Available Permanent Magnets
- Solid-State Reliability
- Small Size
- Resistant to Physical Stress
Description
This low-hysteresis bipolar Hall-effect switch is an extremely temperature-stable and stress-resistant device especially suited for operation over extended temperature ranges to +150°C. Superior high-temperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point stability by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switch points that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. Its low hysteresis makes this device ideal for detecting small changes in magnetic field strength or for use with inexpensive magnets.
The device includes on a single silicon chip a voltage regulator, quadratic Hall-voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger,and a buffered open-collector output to sink up to 25 mA. The on-board regulator permits operation with supply voltages of 3.8 to 24 volts.
The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix ‘L–’ is -40°C to +150°C. Two package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT89/TO-243AA transistor package for surface-mount applications while suffix ‘–UA’ is a three-lead ultra-mini-SIP.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A3134ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134EU | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134LU | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued |
Contact Local Sales Representative or check distributor stock |
|
| A3134LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued; please refer to the A110x family discontinued |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.