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A3134
Bipolar Hall-Effect Switch for High-Temperature Operation
3134.pdf
The A3134 has been phased out of production as of October 31, 2005, and has been replaced by the A1201 next-generation continuous-time bipolar switch.
For samples and information on the replacement part, please refer to the A120x family.
Replacement Device Characteristics Table
| Device | A120x Characteristics | ||||||
|---|---|---|---|---|---|---|---|
| BOP | BRP | Hys | |||||
| Legacy | Replacement | Min | Max | Min | Max | Min | Max |
| A3134 | A1201 | -40 | 50 | -50 | 40 | 5 | 55 |
| A3133 | A1202 | - | 75 | -75 | - | 30 | - |
| A3132 | A1203 | - | 95 | -95 | - | 30 | - |
| - | A1204 | -100 | 150 | -150 | 100 | 50 | 115 |
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 sensor 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 volts to 24 volts.
Functional Block Diagram
| Part Number | Package Type | RoHS | Temperature |
| Compliant | |||
| A3134ELT | 3-lead SOT | No | -40 °C to 85 °C |
| A3134ELTTR | 3-lead SOT | No | -40 °C to 85 °C |
| A3134EU | 3-pin SIP | No | -40 °C to 85 °C |
| A3134EUA | 3-pin SIP | No | -40 °C to 85 °C |
| A3134LLT | 3-lead SOT | No | -40 °C to 150 °C |
| A3134LLTTR | 3-lead SOT | No | -40 °C to 150 °C |
| A3134LU | 3-pin SIP | No | -40 °C to 150 °C |
| A3134LUA | 3-pin SIP | No | -40 °C to 150 °C |
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