ALLEGRO ACS755SCB-200 User Manual

Current Sensor: ACS755SCB-200

5

1

2

3

Package CB-PSF

5

1

2

3

Package CB-PSS

The Allegro ACS75x family of current sensors provides economical and
precise solutions for current sensing in industrial, automotive, commercial, and

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communications systems. The device package allows for easy implementation
by the customer. Typical applications include motor control, load detection and
management, 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 die. Applied current fl owing through
this copper conduction path generates a magnetic fi eld 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, chopper­stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.

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The output of the device will be valid when the current fl ows from pin 4 to pin 5.
The internal resistance of this conductive path is typically 100 μΩ, providing
low power loss. The thickness of the copper conductor allows survival of the
device at up to 5× overcurrent conditions. The terminals of the conductive path
are electrically isolated from the sensor leads (pins 1 through 3). This allows the
ACS75x family of sensors 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 ACS75x
family is lead-free. All leads are coated with 100% matte tin, and there is no lead
inside the package. The heavy gauge leadframe is made of oxygen-free copper.

Pin 1: VCC
Pin 2: GND

Pin 3: VOUT

Terminal 4: IP+
Terminal 5: IP–

AB SO LUTE MAX I MUM RAT INGS

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

Reverse Supply Voltage, V
Output Voltage, V
Reverse Output Voltage, V
Output Current Source, I
Output Current Sink, I
Operating Temperature,
Ambient, T
Maximum Junction, T
Maximum Storage Temperature, T

........................................16 V

OUT

OUT(Sink)

, S range ....................... –20 to 85ºC

A

TÜV America
Certifi cate Number:
U8V 04 11 54214 001

........................–16 V

RCC

...................... –0.1 V

ROUT

OUT(Source)

J(max)

................. 3 mA

.......................10 mA

....................... 165°C

....–65 to 170°C

S

Features and Benefi ts

• Monolithic Hall IC for high reliability

• Single +5 V supply

• 3 kV

isolation voltage between terminals 4/5 and pins 1/2/3

RMS

• 35 kHz bandwidth

• End-of-line factory-trimmed for gain and offset

• Ultra-low power loss: 100 μΩ internal conductor resistance

• Ratiometric output from supply voltage

• Extremely stable output offset voltage

• Small package size, with easy mounting capability

• Output proportional to ac and dc currents

Applications

• Industrial systems

• Power conversion

• Battery monitors

Use the following complete part numbers when ordering:

Part Number Package

ACS755SCB-200-PSF Formed signal pins
ACS755SCB-200-PSS Straight signal pins

ACS755200-DS, Rev. 2

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

Current Sensor: ACS755SCB-200

Functional Block Diagram

+5 V

IP–

Terminal 5

Cancellation

Dynamic Offset

Gain

VCC
Pin 1

Voltage

Regulator

To all subcircuits

Amp Out

Temperature
Coefficient

Filter

Trim Control

Offset

VOUT

Pin 3

0.1 μF

ACS755200-DS, Rev. 2

IP+

Terminal 4

GND
Pin 2

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

2

Current Sensor: ACS755SCB-200

ELECTRICAL CHARACTERISTICS, over operating ambient temperature range unless otherwise stated

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Primary Sensed Current I
Supply Voltage V
Supply Current I
Output Resistance R
Output Capacitance Load C
Output Resistive Load R
Primary Conductor Resistance R
Isolation Voltage V

P

CC

CC

OUT

LOAD

LOAD

PRIMARYIP

ISO

VCC = 5.0 V, output open 6.5 8 10 mA
I

= 1.2 mA – 1 2 Ω

OUT

VOUT to GND – – 10 nF
VOUT to GND 4.7 – – kΩ

= +50A; TA = 25°C – 100 – μΩ

Pins 1-3 and 4-5; 60 Hz, 1 minute 3.0 – – kV

PERFORMANCE CHARACTERISTICS, -20°C to +85°C, VCC = 5 V unless otherwise specifi ed
Propagation time t
Response time t

PROP

RESPONSEIP

Rise time t

r

IP = +50 A, TA = 25°C – 4 – μs

= +50 A, TA = 25°C – 10 – μs

IP = +50 A, T A= 25°C – 10 – μs

Frequency Bandwidth f –3 dB, T = 25°C – 35 – kHz

Sensitivity Sens

Noise V

Linearity E
Zero Current Output Voltage V

Electrical Offset Voltage
(Magnetic error not included)

Magnetic Offset Error
Total Output Error

(Including all offsets)

NOISE

LIN

OUT(Q)

V

OE

I

ERROM

E

TOT

Over full range of IP , TA = 25°C – 20 – mV/A
Over full range of I

P

Peak-to-peak, TA = 25°C,
no external fi lter

Over full range of I

P

I = 0 A, TA= 25°C – 0.6 – V
I = 0 A, TA = 25°C –15 – 15 mV
I = 0 A –25 – 25 mV
I = 0 A, after excursion of 200 A – ±0.1 ±0.15 A
Over full range of IP , TA = 25°C – ±1.0 – %
Over full range of I

P

0 – 200 A

4.5 5.0 5.5 V

19 – 21 mV/A

–45 –mV

– – ±0.8 %

– – ±4.2 %

ACS755200-DS, Rev. 2

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

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