A1363: Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC With Advanced Temperature Compensation and High Bandwidth (120 kHz) Analog Output

Description

The Allegro A1363 programmable linear Hall-effect current sensor IC has been designed to achieve high accuracy and resolution without compromising bandwidth. The goal is achieved through new proprietary linearly interpolated temperature compensation technology that is programmed at the Allegro factory and provides sensitivity and offset that are virtually flat across the full operating temperature range. Temperature compensation is done in the digital domain with integrated EEPROM technology, without sacrificing the analog signal path 120 kHz bandwidth, making this device ideal for HEV inverter and DC-to-DC converter applications.

This ratiometric Hall-effect sensor IC provides a voltage output that is proportional to the applied magnetic field. The customer can configure the sensitivity and quiescent (zero field) output voltage through programming on the VCC and output pins, to optimize performance in the end application. The quiescent output voltage is user-adjustable around 50% of the supply voltage, VCC , and the output sensitivity is adjustable within the range of 0.6 to 14 mV/G.

The sensor IC incorporates a highly sensitive Hall element with a BiCMOS interface integrated circuit that employs a low noise small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary, high bandwidth dynamic offset cancellation technique. These advances in Hall-effect technology work together to provide an industry leading sensing resolution at the full 120 kHz bandwidth. Broken ground wire detection as well as user-selectable output voltage clamps also are built into this device, for high reliability in automotive applications.

Allegro offers a programmer, known as the ASEK-05, to facilitate programing and evaluating this device. The ASEK system is intended for low-volume engineering evaluation and prototyping purposes. It is not intended to be used in volume production environments. Device parameters are specified across an extended ambient temperature range: –40°C to 150°C. The A1363 sensor IC is offered in an extremely thin package: 1 mm case thickness KT package and surface mount TSSOP8 LU package that are lead (Pb) free, with 100% matte tin lead frame plating.

Top Features

  • Proprietary segmented linear interpolated temperature compensation (TC) technology provides a typical accuracy of 1% across the full operating temperature range
  • Customer programmable, high resolution offset and sensitivity trim
  • Factory programmed sensitivity and quiescent output voltage TC with extremely stable temperature performance
  • High sensitivity Hall element for maximum accuracy
  • Extremely low noise and high resolution achieved via proprietary Hall element and low noise amplifier circuits
  • 120 kHz nominal bandwidth achieved via proprietary packaging and chopper stabilization techniques
  • Patented circuits suppress IC output spiking during fast current step inputs
  • Open circuit detection on ground pin (broken wire)
  • Undervoltage lockout for VCC below specification
  • Selectable sensitivity range between 0.6 and 14 mV/G through use of coarse sensitivity programming bits
  • Ratiometric sensitivity, quiescent voltage output, and clamps for interfacing with application A-to-D converter (ADC)
  • Precise recoverability after temperature cycling
  • Output voltage clamps provide short circuit diagnostic capabilities
  • Wide ambient temperature range: –40°C to 150°C
  • Immune to mechanical stress
  • Extremely thin package: 1 mm case thickness KT package and surface mount TSSOP8 LU package

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ASEK1363LKT-01-T DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
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A1363LKTTN-1-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1363LKTTN-10-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1363LKTTN-2-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1363LKTTN-5-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1363LLUTR-1-T 8-lead TSSOP -40°C to 150°C Yes View Data Contact your
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A1363LLUTR-10-T 8-lead TSSOP -40°C to 150°C Yes View Data Contact your
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A1363LLUTR-2-T 8-lead TSSOP -40°C to 150°C Yes View Data Contact your
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A1363LLUTR-5-T 8-lead TSSOP -40°C to 150°C Yes View Data Contact your
local sales rep
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Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.