ACS780xLR: High-Precision Linear Hall-Effect-Based Current Sensor IC With 200 μΩ Current Conductor

Description

The Allegro ACS780xLR is a fully integrated current sensor linear IC in a new core-less package designed to sense AC and DC currents up to 100 A. This automotive-grade, low-profile (1.5 mm thick) sensor IC package has a very small footprint.

The Hall sensor technology also incorporates common-mode field rejection to optimize performance in the presence of interfering magnetic fields generated by nearby current-carrying conductors.

The device consists of a precision, low-offset linear Hall circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. Device accuracy is optimized through the close proximity of the primary conductor to the Hall transducer and factory programming of the sensitivity and quiescent output voltage at the Allegro factory.

Chopper-stabilized signal path and digital temperature compensation technology also contribute to the stability of the device across the operating temperature range. High-level immunity to current conductor dV/dt and stray electric fields is offered by Allegro proprietary integrated shield technology, for low-output voltage ripple and low-offset drift in high-side, high-voltage applications.

The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from terminal 5 to terminal 6), which is the path used for current sampling. The internal resistance of this conductive path is 200 μΩ typical, providing low power loss.

The thickness of the copper conductor allows survival of the device at high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads (pins 1 through 4, and 7), allowing the device to operate safely with voltages up to 100 V peak on the primary conductor.

The device is fully calibrated prior to shipment from the factory. The ACS780xLR family is lead (Pb) free. All leads are plated with 100% matte tin, and there is no Pb inside the package. The heavy gauge leadframe is made of oxygen-free copper.

Top Features

  • Core-less, micro-sized, 100 A continuous current package
  • Ultra-low power loss: 200 μΩ internal conductor resistance
  • Immunity to common-mode field interference
  • Greatly improved total output error through digitally programmed and compensated gain and offset over the full operating temperature range
  • Industry-leading noise performance through proprietary amplifier and filter design techniques
  • Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high-voltage applications
  • Monolithic Hall IC for high reliability
  • 4.5 to 5.5 V, single supply operation
  • 120 kHz typical bandwidth
  • 3.6 μs output rise time in response to step input current
  • Output voltage proportional to AC or DC currents
  • Factory-trimmed for accuracy
  • Extremely stable quiescent output voltage
  • AEC-Q100 automotive qualification
Allegro's family of fully integrated current sensor linear ICs in a core-less package designed to sense AC and DC currents up to 100 A. Allegro’s ACS780/ACS781 are provided in this new automotive-grade, low-profile (1.5 mm thick) sensor IC package that represents the highest current density of any Allegro current sensor IC package to date.
Allegro's family of fully integrated current sensor linear ICs in a core-less package designed to sense AC and DC currents up to 100 A. Allegro’s ACS780/ACS781 are provided in this new automotive-grade, low-profile (1.5 mm thick) sensor IC package that represents the highest current density of any Allegro current sensor IC package to date.

Part Number Specifications and Availability

Part Number 包类型 Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ACS780KLSTR-150B-T n/a -20°C到85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780KLSTR-150U-T n/a -20°C到85°C Yes View Data Contact your
local sales rep
Check
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ACS780LLSTR-050U-T n/a -20°C到85°C Yes View Data Contact your
local sales rep
Check
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ACS780LLSTR-100B-T n/a -20°C到85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780LLSTR-100U-T n/a -20°C到85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780KLRTR-150B-T 7-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep
Check
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ACS780KLRTR-150U-T 7-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep
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asek780klr - 150 b - t DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
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ASEK780KLR-150U-T DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
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ASEK780KLS-150B-T DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Check
Distributor Stock
ACS780LLRTR-050B-T 7-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780LLRTR-050U-T 7-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780LLRTR-100B-T 7-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS780LLRTR-100U-T 7-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ASEK780LLR-100B-T DEMO BOARD -40°C to 150°C No -- Contact your
local sales rep
Check
Distributor Stock
ASEK780LLR-100U-T DEMO BOARD -40°C to 150°C No -- Contact your
local sales rep
Check
Distributor Stock

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.

Design Support Tools

Models

Allegro MicroSystems, LLC provides Gerber files for reference only. Any material, information, or instructions are provided AS IS without warranty of any kind. It is the responsibility of the User(s) to optimize any Printed Circuit Board (PCB) layout, as well as the selection of any components, for the specific application of the User(s).