A1366: Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC With Advanced Temperature Compensation and High Bandwidth (120 kHz) Analog Output

Description

The Allegro A1366 factory-programmable linear Hall effect current sensor IC has been designed to achieve high accuracy and resolution. The goal is achieved through new proprietary linearly interpolated temperature compensation technology that is programmed at the Allegro factory, which provides sensitivity and offset that are virtually flat across the full operating temperature range. The flat performance over temperature makes this IC ideally suited for current sensing applications. Temperature compensation is done in the digital domain with integrated EEPROM technology without sacrificing the analog signal path bandwidth, making this device ideal for HEV inverter, DC-to-DC converter, and electric power steering (EPS) applications.

This ratiometric Hall-effect sensor IC provides a voltage output that is proportional to the applied magnetic field. Sensitivity and quiescent (zero field) output voltage are factory programmed with high resolution which provides for an accuracy of less than ±1%, typical, over temperature.

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, as well as a 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. The device has built in broken ground wire detection for high reliability in automotive applications.

Device parameters are specified across an extended ambient temperature range: –40°C to 150°C. The A1366 sensor IC is provided in an extremely thin case (1 mm thick), 4-pin SIP (single in-line package, suffix KT) that is lead (Pb) free, with 100% matte tin lead frame plating.

Top Features

  • Factory programmed sensitivity and quiescent output voltage with high resolution
  • Proprietary segmented linear interpolated temperature compensation (TC) technology provides a typical accuracy of 1% across the full operating temperature range
  • 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
  • Ratiometric sensitivity and quiescent voltage output
  • Precise recoverability after temperature cycling
  • Wide ambient temperature range: –40°C to 150°C
  • Immune to mechanical stress
  • Extremely thin package: 1 mm case thickness
  • AEC Q-100 automotive qualified

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A1366KKTTN-2-T n/a -20°C to 85°C Yes View Data Contact your
local sales rep
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A1366LKT-1-T n/a -20°C to 85°C Yes View Data Contact your
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A1366LKTTN-1-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
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A1366LKTTN-10-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1366LKTTN-2-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
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A1366LKTTN-5-T 4-lead SIP -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.