Current Sensor: ACS750xCA-100
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
AB SO LUTE MAX I MUM RAT INGS
Operating Temperature
S .....................................................–20 to +85ºC
E .....................................................–40 to +85ºC
Supply Voltage, Vcc...........................................16 V
Reverse Supply Voltage, VRCC ........................–16 V
Output Voltage ...................................................16 V
Reverse Output Voltage, VROUT...................... –0.1 V
Output Current Source ..................................... 3 mA
Output Current Sink........................................10 mA
Maximum Storage Temperature........... –65 to 170°C
Maximum Junction Temperature .................... 165°C
123
4
5
Pin 1: VCC
Pin 2: Gnd
Pin 3: Output
Terminal 4: Ip+
Terminal 5: Ip-
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
• Lead-free
• Automotive temperature range available
• End-of-line factory-trimmed for gain and offset
• Ultra-low power loss: 130 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
• Motor control
• Power conversion
• Battery monitors
• Automotive systems
Always order by complete part number:
ACS750SCA-100
ACS750ECA-100
TÜV America
Certifi cate Number:
U8V 04 11 54214 002
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 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 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 terminal 4 to
terminal 5), which is the path used for current sensing. The internal resistance of
this conductive path is typically 130 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.
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Functional Block Diagram
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
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
ELECTRICAL CHARACTERISTICS, over temperature unless otherwise stated
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Primary Sensed Current IP–100 – 100 A
Supply Voltage VCC 4.5 5.0 5.5 V
Supply Current ICC VCC = 5.0 V, output open – 7 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 – 130 – 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 – 27 – µs
Rise time trIP = ±50 A, TA = +25°C – 26 – µs
Frequency Bandwidth f –3 dB, TA = 25°C – 13 – kHz
Sensitivity Sens Over full range of IP
, TA = 25°C 18.75 19.75 20.75 mV/A
Over full range of IP 17.5 – 21.5 mV/A
Noise VNOISE Peak-to-peak, TA = 25°C
External fi lter BW = 24 kHz –7 –mV
Nonlinearity ELIN Over full range of IP – – ±5 %
Symmetry ESYM Over full range of IP 97 100 103 %
Zero Current Output Voltage VOUT(Q) I = 0 A, TA = 25°C – VCC / 2 – V
Electrical Offset Voltage
(Magnetic error not included) VOE
I = 0 A, TA = 25°C –40 – 40 mV
I = 0 A –50 – 50 mV
Magnetic Offset Error IERROM I = 0 A, after excursion of 100 A – ±0.3 ±0.8 A
Total Output Error
(Including all offsets) ETOT
Over full range of IP
, TA = 25°C – ±1.5 – %
Over full range of IP – – ±13 %
PERFORMANCE CHARACTERISTICS, -40°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 – 27 – µs
Rise time trIP = ±50 A, TA = +25°C – 26 – µs
Frequency Bandwidth f –3 dB, TA = 25°C – 13 – kHz
Sensitivity Sens Over full range of IP
, TA = 25°C 18.75 19.75 20.75 mV/A
Over full range of IP 17.5 – 21.5 mV/A
Noise VNOISE Peak-to-peak; T = +25°C
External fi lter BW = 40 kHz –7 –mV
Nonlinearity ELIN Over full range of IP – – ±5 %
Symmetry ESYM Over full range of IP 97 100 103 %
Zero Current Output Voltage VOUT(Q) I = 0 A – VCC / 2 – V
Electrical Offset Voltage
(Magnetic error not included) VOE
I = 0 A, TA = 25°C –40 – 40 mV
I = 0 A –60 – 60 mV
Magnetic Offset Error IERROM I = 0 A, after excursion of 100 A – 0.3 ±0.8 A
Total Output Error
(Including all offsets) ETOT
Over full range of IP
, TA = 25°C – ±1.5 – %
Over full range of IP – – ±15 %
4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Typical Performance Characteristics
Supply Current
Vcc = 5 V
6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
7.8
8
-50 -25 0 25 50 75 100 125 150
Temperature (°C)
Icc (mA)
Sensitivity
Vcc = 5 V
0
5
10
15
20
25
-100 -75 -50 -25 25 50 75 100
Primary Current (A)
Sensitivity (mV/A)
–40 C
–20 C
25 C
85 C
0.5
1
1.5
2
2.5
3
3.5
4
4.5
-100 -75 -50 -25 0 25 50 75 100
Primary Current (A)
Vout (V)
–40 C
–20 C
25 C
85 C
Non-Linearity
Vcc = 5 V
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-50-25 0 25 50 75100
Temperature (°C)
Linearity at -100 A (%)
Ip = –100 A
Vcc = 5 V
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-50 -25 0 25 50 75 100
Temperature (°C)
Linearity at 100 (%)
Ip = 100 A
Symmetry
Vcc = 5 V
99.5
99.6
99.7
99.8
99.9
100
100.1
100.2
100.3
100.4
100.5
-50 -25 0 25 50 75 100
Temperature (ºC)
Symmetry (%)
Ip = 100 A
Non-Linearity
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Magnetic Offset
Vcc = 5 V
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-50 -25 0 25 50 75 100
Temperature ( C)
Magnetic Offset (A)
I = 0 A, after excursion to 100 A
0 Ampere Accuracy Error
Vcc = 5 V
Without Offset
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-50 -25 0 25 50 75 100
0 Ampere Accuracy (A)
Temperature ( C)
Typical Performance Characteristics
6
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
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. Linearity reveals the maximum deviation from the ideal transfer curve for this transducer. Nonlinearity in the
output can be attributed to the gain variation across temperature and saturation of the fl ux concentrator approaching the full-scale cur-
rent. The following equation is used to derive the linearity:
Defi nitions of Accuracy Characteristics
100 1–
[{
[{
Vout_full-scale amperes –VOUT(Q)
∆ gain × % sat ( )
2(Vout_half-scale amperes –VOUT(Q) )
100
[
[
Vout_+full-scale amperes –VOUT(Q)
VOUT(Q) –Vout_–full-scale amperes
where
∆ gain = the gain variation as a function of temperature changes from 25ºC,
% sat = the percentage of saturation of the fl ux concentrator, which becomes signifi cant as the current
being sensed approaches full-scale ±IP , and
V
out_full-scale amperes = the output voltage (V) when the sensed current approximates full-scale ±IP .
Symmetry (ESYM): The degree to which the absolute voltage output from the sensor varies in proportion to either a positive or nega-
tive full-scale primary current. The following equation is used to derive symmetry:
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 VCC ⁄ 2. Thus, VCC = 5 V translates into VOUT(Q) = 2.5 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 of VCC ⁄ 2 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 ∆ temperature: Accuracy of sensing full-scale current fl ow including temperature effects.
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
+IP(A)
Accuracy
Accuracy
Accuracy
25°C Only
Accuracy
25°C Only
Accuracy
25°C Only
Accuracy
0A
vrOe∆Temperature
Average
VOUT
Decreasing VOUT (V)
–IP(A)
vrOe∆Temperature
vrOe∆Temperature
Increasing VOUT (V)
–100 A 100 A
Full Scale
Output voltage vs. current, illustrating sensor accuracy at 0 A and at full-scale current
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-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
90
0
I (%)
Propagation Time, tPROP
t
Primary Current
Transducer Output
90
0
I (%)
Response Time, tRESPONSE t
Primary Current
Transducer Output
90
10
0
I (%)
Rise Time, trt
9
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Peak to Peak Noise, applying low-pass fi lter to ACS750 output
Low Pass Filter Break Frequency Typical Peak to Peak Noise
Unfi ltered 22.7 mV
1.4 MHz 21 mV
24 kHz 7.1 mV
Step Response, IPRIMARY = 0 to 50 A
Standards and Physical Specifi cations
Parameter Specifi cation
Flammability (package molding compound) UL recognized to UL 94V-0
Safety UL recognized to EN 50178
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 4.18 g typical
ACS750 Output (mV)
Applied Step (A)
10
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Device Branding Key (Two alternative styles are used)
ACS750
TCA100
YYWWA
ACS Allegro Current Sensor
750 Device family number
TOperating ambient temperature range code [S or E]
CA 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
ACS750
TCA100
L...L
YYWW
ACS Allegro Current Sensor
750 Device family number
TOperating ambient temperature range code [S or E]
CA 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
11
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
Package CA
12
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ACS750100-DS Rev. 6
Current Sensor: ACS750xCA-100
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.
Copyright © 2004, 2005 AllegroMicrosystems, Inc.