ACS758: Thermally Enhanced, Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor

CA/CB 5 pin

Description

Top Features

The Allegro ACS758 family of current sensor ICs provides economical and precise solutions for AC or DC current sensing. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection.

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 magnetic signal to the Hall transducer. A precise, proportional output voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.

High-level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology, guarantees 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 4 to terminal 5), which is the path used for current sampling. The internal resistance of this conductive path is 100 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 3). This allows the ACS758 family of sensor ICs to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.

The device is fully calibrated prior to shipment from the factory. The ACS758 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.

  • 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
  • Total output error improvement through gain and offset trim over temperature
  • Small package size, with easy mounting capability
  • Monolithic Hall IC for high reliability
  • Ultralow power loss: 100 µΩ internal conductor resistance
  • Galvanic isolation allows use in economical, high-side current sensing in high-voltage systems
  • AEC-Q100 qualified
  • 3.0 to 5.5 V, single supply operation
  • 120 kHz typical bandwidth
  • 3 µs output rise time in response to step input current
  • Output voltage proportional to AC or DC currents
  • Factory-trimmed for accuracy
  • Extremely stable output offset voltage
  • Nearly zero magnetic hysteresis

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ACS758ECB-200B-PFF-T 5-lead CB -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS758ECB-200B-PSF-T 5-lead CB -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS758ECB-200B-PSS-T 5-lead CB -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS758ECB-200U-PFF-T 5-lead CB -40°C to 85°C Yes View Data Contact your
local sales rep
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Distributor Stock
ACS758KCB-150B-PFF-T 5-lead CB -40°C to 125°C Yes View Data Contact your
local sales rep
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Distributor Stock
ACS758KCB-150B-PSF-T 5-lead CB -40°C to 125°C Yes View Data Contact your
local sales rep
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Distributor Stock
ACS758KCB-150B-PSS-T 5-lead CB -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS758KCB-150U-PFF-T 5-lead CB -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ASEK758KCB-150B-T DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Check
Distributor Stock
ACS758LCB-050B-PFF-T 5-lead CB -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS758LCB-050U-PFF-T 5-lead CB -40°C to 150°C Yes View Data Contact your
local sales rep
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Distributor Stock
ACS758LCB-100B-PFF-T 5-lead CB -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS758LCB-100B-PSF-T 5-lead CB -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ACS758LCB-100U-PFF-T 5-lead CB -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ASEK758LCB-050B-T DEMO BOARD -40°C to 150°C No -- Contact your
local sales rep
Check
Distributor Stock
ASEK758LCB-100B-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.

Current Sensor Ac Dc current sensing package image

Packaging

The ACS758 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.

CB PFF Package Documentation

CB PSF Package Documentation

CB PSS Package Documentation

Design Support Tools

ASEK75x Gerber Files

TÜV Certificate

UL Certificate

Models

ACS LTspice Library

Certificates of Compliance

20170510-E316429 Certificate of Compliance

CB Certificates

Certificate-CB-US-29755-M1-UL [CB]

Frequently Asked Questions

Current Sensor FAQ »

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).