ACS704ELC-015 データシートの表示（PDF） - Allegro MicroSystems

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ACS704ELC-015

Fully Integrated, Hall Effect-Based Linear Current Sensor with Voltage Isolation and a Low-Resistance Current Conductor

Allegro MicroSystems 

ACS704ELC-015

Fully Integrated, Hall Effect-Based Linear Current Sensor

with Voltage Isolation and a Low-Resistance Current Conductor

Package LC

Pin 1: IP+

Pin 2: IP+

Pin 3: IP–

Pin 4: IP–

Pin 8: VCC

Pin 7: VOUT

Pin 6: N.C.

Pin 5: GND

Pins 6 and 7 are internally connected in shipping

product. For compatibility with future devices,

leave pin 6 floating.

Nominal Operating Temperature, TA

Range E............................................ –40 to 85ºC

Overcurrent Transient Tolerance*, IP ................ 60 A

*100 total pulses, 250 ms duration each, applied at a rate of

1 pulse every 100 seconds.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC .......................................... 16 V

Reverse Supply Voltage, VRCC ........................ –16 V

Output Voltage, VOUT ........................................ 16 V

Reverse Output Voltage, VROUT...................... –0.1 V

Output Current Source, IOUT(Source) ................. 3 mA

Output Current Sink, IOUT(Sink).......................10 mA

Operating Temperature,

Maximum Junction, TJ(max)....................... 165°C

Storage Temperature, TS ...................... –65 to 170°C

TÜV America

Certificate Number:

U8V 04 12 54214 005

The Allegro ACS704 family of current sensors provides economical and

precise solutions for current sensing in industrial, automotive, commercial, and

communications systems. The device package allows for easy implementation

by the customer. Typical applications include motor control, load detection and

management, switched-mode power supplies, and overcurrent fault protection.

The device consists of a precision, low-offset linear Hall sensor circuit with

a copper conduction path located near the surface of the die. Applied current

flowing through this copper conduction path generates a magnetic field which is

sensed by the integrated Hall IC and converted into a proportional voltage. Device

accuracy is optimized through the close proximity of the magnetic signal to the

Hall transducer. A precise, proportional voltage is provided by the low-offset,

chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the

factory.

The output of the device has a positive slope (>VCC / 2) when an increasing

current flows through the primary copper conduction path (from pins 1 and 2, to

pins 3 and 4), which is the path used for current sensing. The internal resistance of

this conductive path is typically 1.5 mΩ, providing low power loss. The thickness

of the copper conductor allows survival of the device at up to 3× overcurrent

conditions. The terminals of the conductive path are electrically isolated from the

sensor leads (pins 5 through 8). This allows the ACS704 family of sensors to be

used in applications requiring electrical isolation without the use of opto-isolators

or other costly isolation techniques.

The ACS704 is provided in a small, surface mount SOIC8 package. The leadframe

is plated with 100% matte tin, which is compatible with standard lead (Pb) free

printed circuit board assembly processes. Internally, the flip-chip uses high-tem-

perature Pb-based solder balls, currently exempt from RoHS. The device is fully

calibrated prior to shipment from the factory.

Features and Benefits

• Small footprint, low-profile SOIC8 package

• 1.5 mΩ internal conductor resistance

• Excellent replacement for sense resistors

• 800 VRMS minimum isolation voltage between pins 1-4 and 5-8

• 4.5 to 5.5 V, single supply operation

• 50 kHz bandwidth

• 100 mV/A output sensitivity and 20 A dynamic range

• Output voltage proportional to ac and dc currents

• Factory-trimmed for accuracy

• Extremely stable output offset voltage

• Near-zero magnetic hysteresis

• Ratiometric output from supply voltage

Use the following complete part number when ordering:

Part Number

ACS704ELC-015

Package

SOIC8 surface mount

ACS704ELC015-DS, Rev. 6

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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