ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Features and Benefits
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Description
Low-noise analog signal path
Device –3 dB point is set via the new FILTER pin
Total output error 1.5% at TA= 25°C, 4% at –40°C to 85°C
Small footprint, low-profile SOIC8 package
1.2 mΩ internal conductor resistance
2.1 kVRMS minimum isolation voltage from
pins 1-4 to pins 5-8
5.0 V, single supply operation
50 kHz bandwidth
133 to 185 mV/A output sensitivity
5 µs output rise time in response to step input current
Output voltage proportional to sensed DC current
Factory-trimmed for accuracy
Extremely stable output offset voltage
Nearly zero magnetic hysteresis
Ratiometric output from supply voltage
The Allegro® ACS713 provides economical and precise
solutions for DC 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 precise, 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 after packaging.
Package: 8 Lead SOIC (suffix LC)
The output of the device has a positive slope (>VIOUT(Q))
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 1.2 mΩ typical, providing low power
Continued on the next page…
Approximate Scale 1:1
Typical Application
1
2
IP
IP+
VCC
IP+ VIOUT
ACS713
3
4
IP– FILTER
IP–
GND
+5 V
8
7
VOUT
CBYP
0.1 µF
6
5
CF
Application 1. The ACS713 outputs an analog signal, VOUT .
that varies linearly with the unidirectional DC primary sensed
current, IP , within the range specified. CF is recommended for
noise management, with values that depend on the application.
ACS713-DS
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
Description (continued)
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 5 through 8). This allows the ACS713 current sensor to be
used in applications requiring electrical isolation without the use
of opto-isolators or other costly isolation techniques.
The ACS713 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 device is Pb-free, except for flip-chip high-temperature
Pb‑based solder balls, currently exempt from RoHS. The device is
fully calibrated prior to shipment from the factory.
Selection Guide
Part Number
Packing*
TOP
(°C)
Optimized Range, IP
(A)
Sensitivity, Sens
(Typ) (mV/A)
ACS713ELCTR-20A-T
Tape and reel, 3000 pieces/reel
–40 to 85
0 to 20
185
ACS713ELCTR-30A-T
Tape and reel, 3000 pieces/reel
–40 to 85
0 to 30
133
*Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating
Units
Supply Voltage
VCC
8
V
Reverse Supply Voltage
VRCC
–0.1
V
Output Voltage
VIOUT
8
V
Reverse Output Voltage
VRIOUT
–0.1
V
Output Current Source
IOUT(Source)
3
mA
IOUT(Sink)
10
mA
100 total pulses, 250 ms duration each, applied
at a rate of 1 pulse every 100 seconds.
60
A
Junction Temperature, TJ < TJ(max)
100
A
Output Current Sink
Overcurrent Transient Tolerance
Maximum Transient Sensed Current
Nominal Operating Ambient Temperature
Maximum Junction
Storage Temperature
TÜV America
Certificate Number:
U8V 06 05 54214 010
IP
IR(max)
–40 to 85
ºC
TJ(max)
TA
Range E
165
ºC
Tstg
–65 to 170
ºC
Parameter
Specification
Fire and Electric Shock
CAN/CSA-C22.2 No. 60950-1-03
UL 60950-1:2003
EN 60950-1:2001
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
Functional Block Diagram
+5 V
VCC
(Pin 8)
Hall Current
Drive
IP+
(Pin 1)
Sense Temperature
Coefficient Trim
Dynamic Offset
Cancellation
IP+
(Pin 2)
IP–
(Pin 3)
Signal
Recovery
VIOUT
(Pin 7)
Sense
Trim
IP–
(Pin 4)
0 Ampere
Offset Adjust
GND
(Pin 5)
FILTER
(Pin 6)
Pin-out Diagram
IP+
1
8
VCC
IP+
2
7
VIOUT
IP–
3
6
FILTER
IP–
4
5
GND
Terminal List Table
Number
Name
Description
1 and 2
IP+
Input terminals for current being sensed; fused internally
3 and 4
IP–
Output terminals for current being sensed; fused internally
5
GND
6
FILTER
Signal ground terminal
Terminal for external capacitor that sets bandwidth
7
VIOUT
Analog output signal
8
VCC
Device power supply terminal
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
COMMON OPERATING CHARACTERISTICS1 over full range of TOP, and VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
VCC
4.5
5.0
5.5
V
Supply Current
ICC
VCC = 5.0 V, output open
6
8
11
mA
Supply Zener Clamp Voltage
VZ
ICC = 11 mA, TA = 25°C
6
8.3
–
V
Output Resistance
RIOUT
IIOUT = 1.2 mA, TA=25°C
–
1
2
Ω
Output Capacitance Load
CLOAD
VIOUT to GND
–
–
10
nF
Output Resistive Load
RLOAD
VIOUT to GND
4.7
–
–
kΩ
Primary Conductor Resistance
RPRIMARY
TA = 25°C
RMS Isolation Voltage
VISORMS
Pins 1-4 and 5-8; 60 Hz, 1 minute, TA=25°C
DC Isolation Voltage
VISODC
tPROP
Propagation Time
Response Time
–
1.2
–
mΩ
2100
–
–
V
Pins 1-4 and 5-8; 1 minute, TA=25°C
–
5000
–
V
IP = IP(max), TA = 25°C, COUT = 10 nF
–
3
–
μs
tRESPONSE IP = IP(max), TA = 25°C, COUT = 10 nF
μs
–
7
–
Rise Time
tr
IP = IP(max), TA = 25°C, COUT = 10 nF
–
5
–
μs
Frequency Bandwidth
f
–3 dB, TA = 25°C; IP is 10 A peak-to-peak
50
–
–
kHz
Nonlinearity
ELIN
Over full range of IP , IP applied for 5 ms
–
±1
±1.5
%
Symmetry
ESYM
Over full range of IP , IP applied for 5 ms
98
100
102
%
–
V
–
mV
Zero Current Output Voltage
VIOUT(Q)
Unidirectional; IP = 0 A, TA = 25°C
–
VCC ×
0.1
Magnetic Offset Error
VERROM
IP = 0 A, after excursion of 20 A
–
0
Clamping Voltage
Power-On Time
Magnetic
VCH
Typ. –110
VCC ×
Typ. +110
0.9375
mV
VCL
Typ. –110
VCC ×
Typ. +110
0.0625
mV
tPO
Output reaches 90% of steady-state level, no capacitor on
FILTER pin; TJ = 25; 20 A present on leadframe
Coupling2
Internal Filter Resistance3
–
–
RF(INT)
35
–
µs
12
–
G/A
1.7
kΩ
1Device
may be operated at higher primary current levels, IP, and ambient, TA , and internal leadframe temperatures, TOP , provided that the Maximum
Junction Temperature, TJ(max), is not exceeded.
21G = 0.1 mT.
3R
F(INT) forms an RC circuit via the FILTER pin.
COMMON THERMAL CHARACTERISTICS1
Operating Internal Leadframe Temperature
Junction-to-Lead Thermal Resistance2
Junction-to-Ambient Thermal Resistance2,3
TOP
E range
Min.
Typ.
Max.
–40
–
85
Units
°C
Value
Units
RθJL
Mounted on the Allegro ASEK 713 evaluation board
5
°C/W
RθJA
Mounted on the Allegro 85-0322 evaluation board, includes the power
consumed by the board
23
°C/W
1Additional
thermal information is available on the Allegro website.
evaluation board has 1500 mm2 of 2 oz. copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with thermal vias connecting the layers. Performance values include the power consumed by the PCB. Further details on the board are available from the Frequently Asked
Questions document on our website. Further information about board design and thermal performance also can be found in the Applications Information section of this datasheet.
3R
θJA values shown in this table are typical values, measured on the Allegro evaluation board. The actual thermal performance depends on the actual
application board design, the airflow in the application, and thermal interactions between the sensor and surrounding components through the PCB and
the ambient air. To improve thermal performance, see our applications material on the Allegro website.
2The Allegro
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
x20A PERFORMANCE CHARACTERISTICS TOP = –40°C to 85°C1; VCC = 5 V, unless otherwise specified
Characteristic
Optimized Accuracy Range
Sensitivity2
Noise
Symbol
SensTA
SensTOP
VNOISE(PP)
Electrical Offset Voltage
Total Output Error3
Test Conditions
IP
VOE(TOP)
ETOT
Over full range of IP , IP applied for 5ms; TA = 25°C
Over full range of IP , IP applied for 5 ms
Min.
Typ.
Max.
0
–
20
Units
A
–
185
–
mV/A
179.5
–
190.5
mV/A
Peak-to-peak, TA= 25°C, 20 kHz external filter, 185 mV/A programmed Sensitivity, CF = 4.7 nF, COUT = 10 nF, 20 kHz bandwidth
–
50
–
mV
Peak-to-peak, TA = 25°C, 2 kHz external filter, 185 mV/A programmed Sensitivity, CF = 47 nF, COUT = 10 nF, 2 kHz bandwidth
–
17
–
mV
Peak-to-peak, TA = 25°C, 185 mV/A programmed Sensitivity, CF =
1 nF, COUT = 10 nF, 50 kHz bandwidth
–
80
–
mV
–40
–
40
mV
–
±1.5
–
%
IP = 0 A
IP = 20 A , IP applied for 5 ms; TA = 25°C
1Device
may be operated at higher primary current levels, IP, and ambient temperatures, TOP, provided that the Maximum Junction Temperature,
TJ(max), is not exceeded.
2At –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of I , with I = 20 A. Output filtered.
P
P
x30A PERFORMANCE CHARACTERISTICS TOP = –40°C to 85°C1; VCC = 5 V, unless otherwise specified
Characteristic
Optimized Accuracy Range
Sensitivity2
Noise
Electrical Offset Voltage
Total Output Error3
Symbol
Test Conditions
IP
SensTA
SensTOP
VNOISE(PP)
VOE(TOP)
ETOT
Over full range of IP , IP applied for 5ms; TA = 25°C
Over full range of IP , IP applied for 5 ms
Min.
Typ.
Max.
0
–
30
Units
A
–
133
–
mV/A
129
–
137
mV/A
Peak-to-peak, TA= 25°C, 20 kHz external filter, 133 mV/A programmed Sensitivity, CF = 4.7 nF, COUT = 10 nF, 20 kHz bandwidth
–
33
–
mV
Peak-to-peak, TA = 25°C, 2 kHz external filter, 133 mV/A programmed Sensitivity, CF = 47 nF, COUT = 10 nF, 2 kHz bandwidth
–
10
–
mV
Peak-to-peak, TA = 25°C, 133 mV/A programmed Sensitivity, CF =
1 nF, COUT = 10 nF, 50 kHz bandwidth
–
52
–
mV
–30
–
30
mV
–
±1.5
–
%
IP = 0 A
IP = 30 A , IP applied for 5 ms; TA = 25°C
1Device
may be operated at higher primary current levels, IP, and ambient temperatures, TOP, provided that the Maximum Junction Temperature,
TJ(max), is not exceeded.
2At –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of I , with I = 30 A. Output filtered.
P
P
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Definitions of Accuracy Characteristics
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 amplifier gain (mV/G). The linear IC amplifier gain is programmed 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 amplifier gain
(mV/G) and the noise floor for the Allegro Hall effect linear IC
(≈1 G). The noise floor 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 flux concentrator approaching
the full-scale current. The following equation is used to derive the
linearity:
{ [
100 1–
(VIOUT_full-scale amperes –VIOUT(Q) )
2 (VIOUT_half-scale amperes – VIOUT(Q))
[{
where VIOUT_full-scale amperes = the output voltage (V) when the
sensed current approximates full-scale ±IP .
Quiescent output voltage (VIOUT(Q)). The output of the sensor
when the primary current is zero. For a unipolar supply voltage,
it nominally remains at 0.1 × VCC. Thus, VCC = 5 V translates
into VIOUT(Q) = 0.5 V. Variation in VIOUT(Q) can be attributed to
the resolution of the Allegro linear IC quiescent voltage trim and
thermal drift.
Electrical offset voltage (VOE). The deviation of the device output from its ideal quiescent value of 0.1 × VCC due to nonmagnetic
causes. To convert this voltage to amperes, divide by the device
sensitivity, Sens.
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 flow at 25°C,
without the effects of temperature.
• 0 A over Δ temperature. Accuracy of sensing zero current
flow 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 fullscale current flow including temperature effects.
Ratiometry. The ratiometric feature means that its 0 A output,
VIOUT(Q), (nominally equal to 0.1 × VCC) and sensitivity, Sens, are
proportional to its supply voltage, VCC . The following formula is
used to derive the ratiometric change in 0 A output voltage,
ΔVIOUT(Q)RAT (%).
100
VIOUT(Q)VCC / VIOUT(Q)5V
VCC / 5 V
The ratiometric change in sensitivity, ΔSensRAT (%), is defined
as:
100
SensVCC / Sens5V
VCC / 5 V
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Output Voltage versus Sensed Current
Accuracy at 0 A and at Full-Scale Current
Increasing VIOUT(V)
Accuracy
Over $Temp erature
Accuracy
25°C Only
Average
VIOUT
Accuracy
Over $Temp erature
Accuracy
25°C Only
30 A
–IP (A)
+IP (A)
Full Scale
0A
Decreasing VIOUT(V)
Definitions of Dynamic Response Characteristics
Propagation delay (tPROP). The time required for the sensor
output to reflect a change in the primary current signal. Propagation delay is attributed to inductive loading within the linear IC
package, as well as in the inductive loop formed by the primary
conductor geometry. Propagation delay can be considered as a
fixed time offset and may be compensated.
Response time (tRESPONSE). The time interval between
a) when the primary current signal reaches 90% of its final
value, and b) when the sensor reaches 90% of its output
corresponding to the applied current.
I (%)
Primary Current
90
Transducer Output
0
Propagation Time, tPROP
I (%)
Primary Current
90
Transducer Output
0
Response Time, tRESPONSE
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.
t
I (%)
t
Primary Current
90
Transducer Output
10
0
Rise Time, tr
t
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
Chopper Stabilization Technique
Sample and
Hold
This technique is made possible through the use of a BiCMOS
Chopper Stabilization is an innovative circuit technique that is
used to minimize the offset voltage of a Hall element and an asso- process that allows the use of low-offset and low-noise amplifiers
in combination with high-density logic integration and sample
ciated on-chip amplifier. Allegro patented a Chopper Stabilizaand hold circuits.
tion technique that nearly eliminates Hall IC output drift induced
by temperature or package stress effects. This offset reduction
Regulator
technique is based on a signal modulation-demodulation process.
+5 V
VS1 from
Modulation is used to separate the undesired dc offset signal
Clock/Logic
the magnetically induced signal in the frequency domain. Then,
CBYP
Low-Pass
using a low-pass filter, the modulated dc offset is suppressed
Hall Element 0.1 µF
Filter
8
1
VCC
while the magnetically induced signal passes through the filter.
IP+
U1
7 VOUT
+
2
LMC6772
Amp
As a result of this chopper stabilization approach, the output IP+ VIOUT
–
V
REF
voltage from the Hall IC is desensitized to the effects of temperaACS713
IP1
6
ture and mechanical stress. This technique produces devices3that
IP– FILTER
CF
4
have an extremely stable Electrical Offset Voltage, are immune
to
IP–
5
GND
thermal stress, and have precise recoverability after temperature
Q3
2N7002
cycling.
R3
10 kΩ
Q1
FDS6675a
R1
100 kΩ
Typical Applications
VS2
+5 V
CBYP
0.1 µF
1
2
IP
IP+
R1
33 kΩ
VCC
IP+ VIOUT
ACS713
3
4
IP– FILTER
IP–
GND
8
7
1
VOUT
IP2
4
3
6
5
CF
2
RPU
100 kΩ
R2
100 kΩ
–
+
5
1
+5 V
VCC
IP+
IP+ VIOUT
IP– FILTER
Fault 4 IP–
GND
2 U1
LMV7235
6
–
8
5
IP
Q4
6
2N7002
IP– FILTER
4R4
10IP–
kΩ GND 5
Application 2. 10 A Overcurrent Fault Latch. Fault threshold
set by R1 and R2. This circuit latches an overcurrent fault
and holds it until the 5 V rail is powered down.
2
IP1
VCC
IP+ VIOUT
ACS713
3
4
IP– FILTER
IP–
GND
3
–
LM321
5
VOUT
4
2
C1
1000 pF
R3
3.3 kΩ
CF
0.01 µF
+5 V
IP+
+
Application 3. This configuration increases gain to 610 mV/A
(tested using the ACS712ELC-05A).
VS1
1
1
RF
1 kΩ
ACS713
Q2
FDS6675a
R2
100 kΩ
R2
100 kΩ
1
VCC
IP+
7
2CF
IP+ VIOUT
3
D1
1N914
Application 4. Control circuit for MOSFET ORing.
R1
100 kΩ
U2
LMC6772
+
7 VOUT
LOAD
+5 V
CBYP
CBYP 0.1 µF
0.1 µF
8
VREF
ACS713
3
Concept of Chopper Stabilization Technique
CBYP
0.1 µF
8
+
7 VOUT
VREF
1
U1
LMC6772
–
2
IP2
6
5
+5 V
VS2
CF
IP+
VCC
IP+ VIOUT
ACS713
3
4
IP– FILTER
IP–
GND
CBYP
0.1 µF
8
+
7 VOUT
VREF
–
6
5
CF
Q3
2N7002
Q1
FDS6675a
U2
LMC6772
Q4
2N7002
Q2
FDS6675a
R3
10 kΩ
R4
10 kΩ
R2
100 kΩ
R1
100 kΩ
LOAD
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
Improving Sensing System Accuracy Using the FILTER Pin
In low-frequency sensing applications, it is often advantageous to
add a simple RC filter to the output of the sensor. Such a lowpass filter improves the signal-to-noise ratio, and therefore the
resolution, of the sensor output signal. However, the addition of
an RC filter to the output of a sensor IC can result in undesirable
sensor output attenuation — even for dc signals.
Signal attenuation, ∆VATT , is a result of the resistive divider
effect between the resistance of the external filter, RF (see Application 5), and the input impedance and resistance of the customer
interface circuit, RINTFC. The transfer function of this resistive
divider is given by:
RINTFC
RF + RINTFC
∆VATT = VIOUT
.
Even if RF and RINTFC are designed to match, the two individual
resistance values will most likely drift by different amounts over
temperature. Therefore, signal attenuation will vary as a function
of temperature. Note that, in many cases, the input impedance,
RINTFC , of a typical analog-to-digital converter (ADC) can be as
low as 10 kΩ.
The ACS713 contains an internal resistor, a FILTER pin connection to the printed circuit board, and an internal buffer amplifier. With this circuit architecture, users can implement a simple
RC filter via the addition of a capacitor, CF (see Application 6)
from the FILTER pin to ground. The buffer amplifier inside of
the ACS713 (located after the internal resistor and FILTER pin
connection) eliminates the attenuation caused by the resistive
divider effect described in the equation for ∆VATT. Therefore, the
ACS713 device is ideal for use in high-accuracy applications that
cannot afford the signal attenuation associated with the use of an
external RC low-pass filter.
+5 V
Pin 3 Pin 4
IP–
IP–
VCC
Pin 8
Allegro ACS706
Application 5. When a low pass filter is constructed externally to a standard Hall effect device,
a resistive divider may exist between the filter
resistor, RF, and the resistance of the customer interface circuit, RINTFC. This resistive divider
will cause excessive attenuation, as given by the
transfer function for ∆VATT.
Voltage
Regulator
To all subcircuits
Filter
Dynamic Offset
Cancellation
0.1 MF
Resistive Divider
VIOUT
Pin 7
Amp
Out
N.C.
Pin 6
Input
RF
Application
Interface
Circuit
Low Pass Filter
Temperature
Coefficient
Gain
Offset
CF
RINTFC
Trim Control
GND
Pin 5
IP+
IP+
Pin 1 Pin 2
+5 V
VCC
Pin 8
Allegro ACS713
Hall Current
Drive
IP+
Pin 1
IP+
Pin 2
IP–
Pin 3
IP–
Pin 4
Sense Temperature
Coefficient Trim
Buffer Amplifier
and Resistor
Dynamic Offset
Cancellation
Application 6. Using the FILTER pin
provided on the ACS713 eliminates
the attenuation effects of the resistor divider between RF and RINTFC,
shown in Application 5.
Signal
Recovery
VIOUT
Pin 7
Input
Application
Interface
Circuit
Sense
Trim
0 Ampere
Offset Adjust
RINTFC
GND
Pin 5
FILTER
Pin 6
CF
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Fully Integrated, Hall Effect-Based Linear Current Sensor with
2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS713
Package LC, 8-pin SOIC
6.20 .244
5.80 .228
0.25 [.010] M B M
8
Preliminary dimensions, for reference only
Dimensions in millimeters
U.S. Customary dimensions (in.) in brackets, for reference only
(reference JEDEC MS-012 AA)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Terminal #1 mark area
5.00 .197
4.80 .189
8º
0º
A
B
0.25 .010
0.17 .007
4.00 .157
3.80 .150
1.27 .050
0.40 .016
A
1
2
0.25 .010
8X
8X
0.51 .020
0.31 .012
0.25 .010
0.10 .004
1.27 .050
ACS713T
RLCPPP
YYWWA
ACS
713
T
R
LC
PPP
YY
WW
A
2
Text 1
Text 2
Text 3
Two alternative patterns are used
1
SEATING PLANE
GAUGE PLANE
1.75 .069
1.35 .053
0.25 [.010] M C A B
Package Branding
C
SEATING
PLANE
0.10 [.004] C
8
7
3
6
4
5
Allegro Current Sensor
Device family number
Indicator of 100% matte tin leadframe plating
Operating ambient temperature range code
Package type designator
Primary sensed current
Date code: Calendar year (last two digits)
Date code: Calendar week
Date code: Shift code
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 departures from the detail specifications as may be
required to permit improvements in the performance, reliability,
ACS713T
RLCPPP
L...L
YYWW
ACS
713
T
R
LC
PPP
L...L
YY
WW
Allegro Current Sensor
Device family number
Indicator of 100% matte tin leadframe plating
Operating ambient temperature range code
Package type designator
Primary sensed current
Lot code
Date code: Calendar year (last two digits)
Date code: Calendar week
or manufacturability of its products. Before placing an order, the
user is cautioned to verify that the information being relied upon
is current.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other
rights of third parties which may result from its use.
Copyright ©2006, Allegro MicroSystems, Inc.
For the latest version of this document, go to our website at:
www.allegromicro.com
10
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com