ACS755LCB-100-PSS - Allegro MicroSystems, Inc.

Current Sensor: ACS755xCB-100

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Use the following complete part numbers when ordering:

Pin 1: VCC

Pin 2: GND

Pin 3: VOUT

Terminal 4: IP+

Terminal 5: IP–

Package CB-PSF

Package CB-PSS

AB SO LUTE MAX I MUM RAT INGS

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,

Ambient, TA, L range ..................... –40 to 150ºC

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

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

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

Package CB-PFF

Features and Beneﬁ ts

• Monolithic Hall IC for high reliability

• Single +5 V supply

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

• 27 kHz bandwidth

• Automotive temperature range

• 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

• Automotive systems

• Industrial systems

• Power conversion

• Battery monitors

Part Number Signal Pins Terminals Ambient

ACS755LCB-100-PFF Formed Formed

–40 to 150°CACS755LCB-100-PSF Formed Straight

ACS755LCB-100-PSS Straight Straight

ACS755SCB-100-PFF Formed Formed

–20 to 85°C

ACS755SCB-100-PSF Formed Straight

ACS755SCB-100-PSS Straight Straight

TÜV America

Certiﬁ cate Number:

U8V 04 11 54214 001

The Allegro ACS75x 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 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, chopper-

stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.

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.

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Amp Out

VCC

+5 V

Pin 1

Pin 3

VOUT

GND

Pin 2

Filter

Dynamic Offset

Cancellation

0.1 μF

IP–

IP+

Gain Temperature

Coefficient Offset

Voltage

Regulator

Trim Control

To all subcircuits

Terminal 5

Terminal 4

Functional Block Diagram

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Primary Sensed Current IP0 – 100 A

Supply Voltage VCC 4.5 5.0 5.5 V

Supply Current ICC VCC = 5.0 V, output open 6.5 8 10 mA

Output Resistance ROUT IOUT = 1.2 mA – 1 2 Ω

Output Capacitance Load CLOAD VOUT to GND – – 10 nF

Output Resistive Load RLOAD VOUT to GND 4.7 – – kΩ

Primary Conductor Resistance RPRIMARY IP = +100A; TA = 25°C – 100 – μΩ

Isolation Voltage VISO 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 tPROP IP = +50 A, TA = 25°C – 4 – μs

Response time tRESPONSE IP = +50 A, TA = 25°C – 13 – μs

Rise time trIP = +50 A, TA = 25°C – 13 – μs

Frequency Bandwidth f –3 dB , TA = 25°C – 27 – kHz

Sensitivity Sens Over full range of IP

, TA = 25°C – 40 – mV/A

Over full range of IP 36.5 – 41.5 mV/A

Noise VNOISE Peak-to-peak, TA = 25°C,

no external ﬁ lter –65 –mV

Linearity ELIN Over full range of IP – – ±2.8 %

Zero Current Output Voltage VOUT(Q) I = 0 A, TA = 25°C – 0.6 – V

Electrical Offset Voltage

(Magnetic error not included) VOE

I = 0 A, TA = 25°C –15 – 15 mV

I = 0 A –25 – 25 mV

Magnetic Offset Error IERROM I = 0 A, after excursion of 100 A – ±0.1 ±0.15 A

Total Output Error

(Including all offsets) ETOT

Over full range of IP

, TA = 25°C – ±1 – %

Over full range of IP – – ±9.0 %

PERFORMANCE CHARACTERISTICS, -40°C to +150°C, VCC = 5 V unless otherwise speciﬁ ed

Propagation time tPROP IP = +50 A, TA = 25°C – 4 – μs

Response time tRESPONSE IP = +50 A, TA = 25°C – 13 – μs

Rise time trIP = +50 A, TA = 25°C – 13 – μs

Frequency Bandwidth f –3 dB , TA = 25°C – 27 – kHz

Sensitivity Sens Over full range of IP

, TA = 25°C – 40 – mV/A

Over full range of IP 36 – 42 mV/A

Noise VNOISE Peak-to-peak, TA = 25°C,

no external ﬁ lter –65 –mV

Linearity ELIN Over full range of IP – – ±2.8 %

Zero Current Output Voltage VOUT(Q) I = 0 A, TA = 25°C – 0.6 – V

Electrical Offset Voltage

(Magnetic error not included) VOE

I = 0 A, TA = 25°C –15 – 15 mV

I = 0 A –50 – 50 mV

Magnetic Offset Error IERROM I = 0 A, after excursion of 100 A – ±0.1 ±0.15 A

Total Output Error

(Including all offsets) ETOT

Over full range of IP

, TA = 25°C – ±1 – %

Over full range of IP – – ±10.0 %

ELECTRICAL CHARACTERISTICS, over operating ambient temperature range unless otherwise stated

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

onlinearity (%) = 100

1 –

Vout _1/4 full-scale IP –VOUT(Q)

Vout _3/4 full-scale IP –VOUT(Q)

‰

Sensitivity (Sens): The change in sensor output in response to a 1 A change through the primary conductor. The sensitivity is the

product of the magnetic circuit sensitivity (G / A) and the linear IC ampliﬁ er gain (mV/G). The linear IC ampliﬁ er gain is trimmed at the

factory to optimize the sensitivity (mV/A) for the full-scale current of the device.

Noise (VNOISE): The product of the linear IC ampliﬁ er gain (mV/G) and the noise ﬂ oor for the Allegro Hall effect linear IC (≈1 G).

The noise ﬂ oor is derived from the thermal and shot noise observed in Hall elements. Dividing the noise (mV) by the sensitivity

(mV/A) provides the smallest current that the device is able to resolve.

Linearity (ELIN): The degree to which the voltage output from the sensor varies in direct proportion to the primary current through its

full-scale amplitude. Nonlinearity in the output can be attributed to the saturation of the ﬂ ux concentrator approaching the full-scale

current. The following equation is used to derive the linearity

Deﬁ nitions of Accuracy Characteristics

where

Vout_¼ full-scale IP (V) is the output voltage when the sensed current approximates 0.25 × IP(max), and

Vout_¾ full-scale IP (V) is the output voltage when the sensed current approximates 0.75 × IP(max).

Quiescent output voltage (VOUT(Q)): The output of the sensor when the primary current is zero. For a unipolar supply voltage, it

nominally remains at 0.6 V. Variation in VOUT(Q) can be attributed to the resolution of the Allegro linear IC quiescent voltage trim,

magnetic hysteresis, and thermal drift.

Electrical offset voltage (VOE): The deviation of the device output from its ideal quiescent value due to nonmagnetic causes.

Magnetic offset error (IERROM): The magnetic offset is due to the residual magnetism (remnant ﬁ eld) of the core material. The mag-

netic offset error is highest when the magnetic circuit has been saturated, usually when the device has been subjected to a full-scale or

high-current overload condition. The magnetic offset is largely dependent on the material used as a ﬂ ux concentrator. The larger mag-

netic offsets are observed at the lower operating temperatures.

Accuracy (ETOT): The accuracy represents the maximum deviation of the actual output from its ideal value. This is also known as the

total ouput error. The accuracy is illustrated graphically in the Output Voltage versus Current chart on the following page.

Accuracy is divided into four areas:

• 0 A at 25°C: Accuracy of sensing zero current ﬂ ow at 25°C, without the effects of temperature.

• 0 A over temperature: Accuracy of sensing zero current ﬂ ow including temperature effects.

• Full-scale current at 25°C: Accuracy of sensing the full-scale current at 25°C, without the effects of temperature.

• Full-scale current over Δ temperature: Accuracy of sensing full-scale current ﬂ ow including temperature effects.

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Increasing VOUT (V)

+IP(A)

Accuracy

25°C Only

Accuracy

25°C Only

Accuracy

vrOeΔTemperature

Average

VOUT

–IP(A)

vrOeΔTemperature

Decreasing VOUT (V)

100 A

Full Scale

Output voltage vs. current, illustrating sensor accuracy at 0 A and at full-scale current

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Step Response of ACS755xCB-100 at TA=25°C

ACS755 Output (mV)

50 A Excitation Signal

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Deﬁ nitions of Dynamic Response Characteristics

Propagation delay (tPROP): The time required for the sensor output to reﬂ ect a change in the primary current

signal. Propagation delay is attributed to inductive loading within the linear IC package, as well as in the induc-

tive loop formed by the primary conductor geometry. Propagation delay can be considered as a ﬁ xed time offset

and may be compensated.

Response time (tRESPONSE): The time interval between a) when the primary current signal reaches 90% of its

ﬁ nal value, and b) when the sensor reaches 90% of its output corresponding to the applied current.

Rise time (tr): The time interval between a) when the sensor reaches 10% of its full scale value, and b) when

it reaches 90% of its full scale value. The rise time to a step response is used to derive the bandwidth of the

current sensor, in which ƒ(–3 dB) = 0.35 / tr. Both tr and tRESPONSE are detrimentally affected by eddy current

losses observed in the conductive IC ground plane and, to varying degrees, in the ferrous ﬂ ux concentrator

within the current sensor package.

Primary Current

Transducer Output

I (%)

Propagation Time, tPROP

Primary Current

Transducer Output

I (%)

Response Time, tRESPONSE t

Primary Current

Transducer Output

I (%)

Rise Time, trt

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Standards and Physical Speciﬁ cations

Parameter Speciﬁ cation

Flammability (package molding compound) UL recognized to UL 94V-0

Fire and Electric Shock

UL60950-1:2003

EN60950-1:2001

CAN/CSA C22.2 No. 60950-1:2003

Creepage distance, current terminals to sensor pins 7.25 mm

Clearance distance, current terminals to sensor pins 7.25 mm

Package mass 4.63 g typical

Device Branding Key (Two alternative styles are used)

ACS755

TCB100

YYWWA

ACS Allegro Current Sensor

755 Device family number

TOperating ambient temperature range code [L or S]

CB Package type designator

100 Maximum measurable current

YY Manufacturing date code: Calendar year (last two digits)

WW Manufacturing date code: Calendar week

AManufacturing date code: Shift code

ACS755

TCB100

L...L

YYWW

ACS Allegro Current Sensor

755 Device family number

TOperating ambient temperature range code [L or S]

CB Package type designator

100 Maximum measurable current

L...L Manufacturing lot code

YY Manufacturing date code: Calendar year (last two digits)

WW Manufacturing date code: Calendar week

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Package CB-PFF

115 Northeast Cutoff, Box 15036

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

ACS755100-DS, Rev. 2

Current Sensor: ACS755xCB-100

Package CB-PSF Package CB-PSS

The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889;

5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i ﬁ ca tions as may be required to

permit improvements in the per for mance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that

the information being relied upon is current.

Allegro products are not authorized for use as critical components in life-support devices or sys tems without express written approval.

The in for ma tion in clud ed herein is believed to be ac cu rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its

use; nor for any in fringe ment of patents or other rights of third parties which may result from its use.