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High-Performance Power and Hall-Effect Sensor ICs

A3134
Bipolar Hall-Effect Switch for High-Temperature Operation

Pin-Out or Package

The A3134 has been phased out of production as of October 31, 2005, and has been replaced by the A1205 next-generation continuous-time bipolar switch.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

Functional Block Diagram

Complete Part Numbers
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.

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