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

Description

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, provides 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

Features

• 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

Applications

The ACS758 outputs an analog signal, VOUT, that varies linearly with the uni- or bi-directional AC or DC primary sampled current, IP, within the range specified. CF is for optimal noise management, with values that depend on the application.

Date Sheet

Quality Assurance

1: Before the products are put into storage, we will preliminarily verify the external packaging,labels,

quantity, etc. of the products;

2: After the preliminary inspection, the products will enter the inspection waiting area,and thenwe will

use professional equipment for inspection Equipment such as X-RAY gold sample detection, silk

screen contrast detection with magnifying glass, and alcohol detection,The silk screen shall be

checked, and the qualified ones shall be printed and put into storage.

3: The product will be stored in a constant temperature and humidity environment, and aspecially

assigned person will check, confirm and record it every day.

4: Before the products are delivered from the warehouse, the first and second tests will be repeated

according to the customer's order to ensure that the outgoing products reviewthe customer's

requirements.

Transportations & Payments

Frequently Asked Questions

Shipping:

1, We can shipping all over the world by DHL, UPS, FEdex, TNT and EMS.The packaging is very

safe and strong. Please nitfy me you have any special needs
2, It will take around 3-5 days to reach your hands.

Product Type & condition:
Because of the fluctuant sales situation. the stock parts are always changing and the stock list cannot

be, promptly updated.So please consult the stock situation when you inquire.

Buyer Reading:
1. Please confirm receipt of products if the items you received,and if the goods was damaged please

contact us immediately. send the photo to us that we can check and give you best solution

2. We only guarantee delivery in time but we couldn't control the express delivery time. Our related

sales person will be responsible to send the AWB for the delivered goods in the next workday.

you can check the AWB in the website which we send to you. For the AWByou also can call to the

local branch of the express company in your company.

Pre-sales service :

1. Our team design and make solutions based on different requirements from different customers.

2. We provide 24-hours service,and every message you quote inquiry will be replied within12 hours