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High-Performance Power ICs and Hall-Effect Sensors
Related Links:
Datasheets:
3134: Bipolar Hall-Effect Switch for High-Temperature Operation (PDF)
Selection Guides:
Hall-Effect Sensors,
Bipolar Hall-Effect Digital Switches
Technical Publications:
Understanding Bipolar Hall-Effect Sensors (PDF),
A120x Family Provides Advance Drop-In Replacements for A313x Devices (PDF)
Press Releases:
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The A3134 has been phased out of production as of October 31, 2005, and has been replaced by the A1205 next-generation continuous-time bipolar switch.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 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 Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A3134ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134EU | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134LU | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| A3134LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. |
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.