ACS713 [ALLEGRO]
Fully Integrated, Hall Effect-Based Linear Current Sensor with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor; 全集成，基于霍尔效应的线性电流传感器与2.1 kVRMS电压绝缘及低电阻电流导体
| 型号： | ACS713 |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Fully Integrated, Hall Effect-Based Linear Current Sensor with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor |
| 文件： | 总10页 (文件大小：900K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Features and Benefits
Description
▪ Low-noise analog signal path
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, andovercurrent
fault protection.
▪ 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
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.
▪ 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
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
+5 V
8
7
1
VCC
IP+
VOUT
2
C
VIOUT
IP+
0.B1YPµF
IP
ACS713
6
5
3
4
FILTER
IP–
IP–
CF
GND
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
TheACS713 is provided in a small, surface mount SOIC8 package.
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 leadframe is plated with 100% matte tin, which is compatible
withstandardlead(Pb)freeprintedcircuitboardassemblyprocesses.
Internally,thedeviceisPb-free,exceptforflip-chiphigh-temperature
Pb-based solder balls, currently exempt from RoHS. The device is
fully calibrated prior to shipment from the factory.
Selection Guide
TOP
(°C)
Optimized Range, IP Sensitivity, Sens
Part Number
Packing*
(A)
(Typ) (mV/A)
ACS713ELCTR-ꢀ0A-T
ACS713ELCTR-30A-T
Tape and reel, 3000 pieces/reel
Tape and reel, 3000 pieces/reel
–40 to 85
–40 to 85
0 to ꢀ0
0 to 30
185
133
*Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic
Symbol
VCC
Notes
Rating
8
Units
V
Supply Voltage
Reverse Supply Voltage
Output Voltage
VRCC
–0.1
8
V
VIOUT
V
Reverse Output Voltage
Output Current Source
Output Current Sink
VRIOUT
IOUT(Source)
IOUT(Sink)
–0.1
3
V
mA
mA
10
100 total pulses, ꢀ50 ms duration each, applied
at a rate of 1 pulse every 100 seconds.
Overcurrent Transient Tolerance
IP
60
A
A
Maximum Transient Sensed Current
Nominal Operating Ambient Temperature
Maximum Junction
IR(max)
TA
Junction Temperature, TJ < TJ(max)
Range E
100
–40 to 85
165
ºC
ºC
ºC
TJ(max)
Tstg
Storage Temperature
–65 to 170
Parameter
Fire and Electric Shock
Specification
TÜV America
CAN/CSA-Cꢀꢀ.ꢀ No. 60950-1-03
UL 60950-1:ꢀ003
Certificate Number:
U8V 06 05 54ꢀ14 010
EN 60950-1:ꢀ001
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+
Sense Temperature
Coefficient Trim
(Pin 1)
IP+
(Pin 2)
Signal
VIOUT
(Pin 7)
Recovery
IP–
(Pin 3)
Sense
Trim
IP–
0 Ampere
Offset Adjust
(Pin 4)
GND
(Pin 5)
FILTER
(Pin 6)
Pin-out Diagram
IP+
IP+
IP–
IP–
1
2
3
4
8
7
6
5
VCC
VIOUT
FILTER
GND
Terminal List Table
Number
Name
Description
1 and ꢀ
IP+
Input terminals for current being sensed; fused internally
Output terminals for current being sensed; fused internally
Signal ground terminal
3 and 4
IP–
5
6
7
8
GND
FILTER
VIOUT
VCC
Terminal for external capacitor that sets bandwidth
Analog output signal
Device power supply terminal
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
3
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
6
5.0
8
5.5
11
–
V
mA
V
Supply Current
ICC
VZ
VCC = 5.0 V, output open
ICC = 11 mA, TA = ꢀ5°C
IIOUT = 1.ꢀ mA, TA=ꢀ5°C
VIOUT to GND
Supply Zener Clamp Voltage
Output Resistance
6
8.3
1
RIOUT
CLOAD
RLOAD
–
ꢀ
Ω
Output Capacitance Load
Output Resistive Load
–
–
10
–
nF
kΩ
mΩ
V
VIOUT to GND
4.7
–
–
Primary Conductor Resistance RPRIMARY TA = ꢀ5°C
1.ꢀ
–
–
RMS Isolation Voltage
DC Isolation Voltage
Propagation Time
Response Time
Rise Time
VISORMS Pins 1-4 and 5-8; 60 Hz, 1 minute, TA=ꢀ5°C
ꢀ100
–
–
VISODC
tPROP
Pins 1-4 and 5-8; 1 minute, TA=ꢀ5°C
IP = IP(max), TA = ꢀ5°C, COUT = 10 nF
5000
3
–
V
–
–
μs
μs
μs
kHz
%
tRESPONSE IP = IP(max), TA = ꢀ5°C, COUT = 10 nF
–
7
–
tr
f
IP = IP(max), TA = ꢀ5°C, COUT = 10 nF
–3 dB, TA = ꢀ5°C; IP is 10 A peak-to-peak
Over full range of IP, IP applied for 5 ms
Over full range of IP, IP applied for 5 ms
–
5
–
Frequency Bandwidth
Nonlinearity
50
–
–
–
ELIN
ESYM
±1
100
±1.5
10ꢀ
Symmetry
98
%
VCC
0.1
×
Zero Current Output Voltage
Magnetic Offset Error
VIOUT(Q) Unidirectional; IP = 0 A, TA = ꢀ5°C
VERROM IP = 0 A, after excursion of ꢀ0 A
VCH
–
–
–
–
V
0
mV
mV
VCC
0.9375
×
Typ.–110
Typ.+110
Clamping Voltage
Power-On Time
VCC
0.06ꢀ5
×
VCL
Typ.–110
Typ.+110
mV
µs
Output reaches 90% of steady-state level, no capacitor on
FILTER pin; TJ=ꢀ5; ꢀ0 A present on leadframe
tPO
–
–
35
–
–
Magnetic Couplingꢀ
1ꢀ
G/A
Internal Filter Resistance3
RF(INT)
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.
ꢀ1G = 0.1 mT.
3RF(INT) forms an RC circuit via the FILTER pin.
COMMON THERMAL CHARACTERISTICS1
Min.
–40
Typ.
–
Max.
85
Units
°C
Operating Internal Leadframe Temperature
TOP E range
Value
5
Units
°C/W
Junction-to-Lead Thermal Resistanceꢀ
RθJL Mounted on the Allegro ASEK 713 evaluation board
Mounted on the Allegro 85-03ꢀꢀ evaluation board, includes the power
consumed by the board
Junction-to-Ambient Thermal Resistanceꢀ,3 RθJA
ꢀ3
°C/W
1Additional thermal information is available on the Allegro website.
ꢀThe Allegro evaluation board has 1500 mmꢀ of ꢀ oz. copper on each side, connected to pins 1 and ꢀ, and to pins 3 and 4, with thermal vias connect-
ing 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 Informa-
tion section of this datasheet.
3RθJA 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.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
4
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
x20A PERFORMANCE CHARACTERISTICS TOP = –40°C to 85°C1; VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
–
Max.
ꢀ0
Units
A
Optimized Accuracy Range
IP
0
SensTA
Over full range of IP, IP applied for 5ms; TA = ꢀ5°C
–
185
–
–
mV/A
mV/A
Sensitivityꢀ
Noise
SensTOP Over full range of IP, IP applied for 5 ms
179.5
190.5
Peak-to-peak, TA= ꢀ5°C, ꢀ0 kHz external filter, 185 mV/A pro-
grammed Sensitivity, CF=4.7 nF, COUT = 10 nF, ꢀ0 kHz bandwidth
–
–
–
50
17
80
–
–
–
mV
mV
mV
Peak-to-peak, TA = ꢀ5°C, ꢀ kHz external filter, 185 mV/A pro-
VNOISE(PP)
grammed Sensitivity, CF = 47 nF, COUT = 10 nF, ꢀ kHz bandwidth
Peak-to-peak, TA = ꢀ5°C, 185 mV/A programmed Sensitivity, CF =
1 nF, COUT = 10 nF, 50 kHz bandwidth
Electrical Offset Voltage
Total Output Error3
VOE(TOP) IP = 0 A
–40
–
–
40
–
mV
%
ETOT
IP = ꢀ0 A, IP applied for 5 ms; TA = ꢀ5°C
±1.5
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.
ꢀAt –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of IP, with IP = ꢀ0 A. Output filtered.
x30A PERFORMANCE CHARACTERISTICS TOP = –40°C to 85°C1; VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
–
Max.
30
Units
A
Optimized Accuracy Range
IP
0
SensTA
Over full range of IP, IP applied for 5ms; TA = ꢀ5°C
–
133
–
–
mV/A
mV/A
Sensitivityꢀ
Noise
SensTOP Over full range of IP, IP applied for 5 ms
1ꢀ9
137
Peak-to-peak, TA= ꢀ5°C, ꢀ0 kHz external filter, 133 mV/A pro-
grammed Sensitivity, CF=4.7 nF, COUT = 10 nF, ꢀ0 kHz bandwidth
–
–
–
33
10
5ꢀ
–
–
–
mV
mV
mV
Peak-to-peak, TA = ꢀ5°C, ꢀ kHz external filter, 133 mV/A pro-
VNOISE(PP)
grammed Sensitivity, CF = 47 nF, COUT = 10 nF, ꢀ kHz bandwidth
Peak-to-peak, TA = ꢀ5°C, 133 mV/A programmed Sensitivity, CF =
1 nF, COUT = 10 nF, 50 kHz bandwidth
Electrical Offset Voltage
Total Output Error3
VOE(TOP) IP = 0 A
–30
–
–
30
–
mV
%
ETOT
IP = 30 A, IP applied for 5 ms; TA = ꢀ5°C
±1.5
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.
ꢀAt –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of IP, with IP = 30 A. Output filtered.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
5
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
Definitions of Accuracy Characteristics
Sensitivity (Sens). The change in sensor output in response to a
1A 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 pro-
grammed at the factory to optimize the sensitivity (mV/A) for the
full-scale current of the device.
causes. To convert this voltage to amperes, divide by the device
sensitivity, Sens.
Accuracy (ETOT). The accuracy represents the maximum devia-
tion 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.
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.
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.
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:
•ꢀ Full-scale current at 25°C. Accuracy of sensing the full-scale
current at 25°C, without the effects of temperature.
•ꢀ Full-scale current overΔ temperature. Accuracy of sensing full-
scale current flow including temperature effects.
Ratiometry. The ratiometric feature means that its 0 A output,
V
IOUT(Q), (nominally equal to 0.1×VCC) and sensitivity, Sens, are
V
–VIOUT(Q) )
(
IOUT_full-scale amperes
2 (VIOUT_half-scale amperes –VIOUT(Q)
100
1–
) [ {
proportional to its supply voltage, VCC.The following formula is
used to derive the ratiometric change in 0 A output voltage,
ΔVIOUT(Q)RAT (%).
where VIOUT_full-scale amperes = the output voltage (V) when the
sensed current approximates full-scale ±IP .
V
IOUT(Q)VCC /VIOUT(Q)5V
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.
100
VCC
/
5 V
The ratiometric change in sensitivity, ΔSensRAT (%), is defined
as:
SensVCC / Sens5V
100
Electrical offset voltage (VOE). The deviation of the device out-
put from its ideal quiescent value of 0.1×VCC due to nonmagnetic
VCC
/
5 V
Allegro MicroSystems, Inc.
6
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
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
V
IOUT
Accuracy
Over $Temp erature
Accuracy
25°C Only
30 A
–IP (A)
+IP (A)
Full Scale
0 A
Decreasing VIOUT(V)
Definitions of Dynamic Response Characteristics
Primary Current
I (%)
90
Propagation delay (tPROP). The time required for the sensor
output to reflect a change in the primary current signal. Propaga-
tion 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.
Transducer Output
0
t
Propagation Time, tPROP
Primary Current
I (%)
90
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.
Transducer Output
0
t
Response Time, t
RESPONSE
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.
Primary Current
I (%)
90
Transducer Output
10
0
t
Rise Time, t
r
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
7
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
Chopper Stabilization is an innovative circuit technique that is
This technique is made possible through the use of a BiCMOS
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
ciated on-chip amplifier. Allegro patented a Chopper Stabiliza-
tion technique that nearly eliminates Hall IC output drift induced
by temperature or package stress effects. This offset reduction
technique is based on a signal modulation-demodulation process.
Modulation is used to separate the undesired dc offset signal from
the magnetically induced signal in the frequency domain. Then,
using a low-pass filter, the modulated dc offset is suppressed
while the magnetically induced signal passes through the filter.
As a result of this chopper stabilization approach, the output
voltage from the Hall IC is desensitized to the effects of tempera-
ture and mechanical stress. This technique produces devices that
have an extremely stable Electrical Offset Voltage, are immune to
thermal stress, and have precise recoverability after temperature
cycling.
in combination with high-density logic integration and sample
and hold circuits.
Regulator
Clock/Logic
Low-Pass
Filter
Hall Element
Amp
Concept of Chopper Stabilization Technique
Typical Applications
+5 V
+5 V
CBYP
0.1 µF
CBYP
0.1 µF
R1
R1
33 kΩ
100 kΩ
RPU
100 kΩ
R2
R2
100 kΩ
100 kΩ
LM321
4
1
3
8
7
+
–
5
2
8
7
1
2
VCC
VOUT
1
2
IP+
IP+
VCC
IP+
IP+
VOUT
4
3
5
2
VIOUT
–
+
Fault
VIOUT
1
RF
1 kΩ
IP
ACS713
C1
IP
ACS713
U1
6
5
1000 pF
R3
3
4
6
5
LMV7235
FILTER
3
4
IP–
IP–
FILTER
3.3 kΩ
IP–
IP–
CF
CF
0.01 µF
GND
GND
D1
1N914
Application ꢀ. 10 A Overcurrent Fault Latch. Fault threshold
set by R1 and Rꢀ. This circuit latches an overcurrent fault
and holds it until the 5 V rail is powered down.
Application 3. This configuration increases gain to 610 mV/A
(tested using the ACS71ꢀELC-05A).
+5 V
+5 V
VS2
VS1
CBYP
CBYP
0.1 µF
0.1 µF
8
7
8
7
1
1
VCC
VCC
IP+
IP+
IP+
U2
U1
VOUT
VOUT
+
–
2
+
–
2
LMC6772
LMC6772
VIOUT
VIOUT
IP+
VREF
VREF
ACS713
ACS713
IP2
IP1
6
5
6
5
3
4
3
4
FILTER
FILTER
IP–
IP–
IP–
IP–
Application 4. Control circuit for MOSFET ORing.
CF
CF
GND
GND
Q3
2N7002
Q4
2N7002
Q2
Q1
R4
10 kΩ
R3
10 kΩ
FDS6675a
FDS6675a
R2
R1
100 kΩ
100 kΩ
LOAD
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
8
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 temperature. Therefore, signal attenuation will vary as a function
add a simple RC filter to the output of the sensor. Such a low-
pass 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.
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 connec-
tion to the printed circuit board, and an internal buffer ampli-
fier. 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.
Signal attenuation, ∆VATT, is a result of the resistive divider
effect between the resistance of the external filter, RF (see Appli-
cation 5), and the input impedance and resistance of the customer
interface circuit, RINTFC. The transfer function of this resistive
divider is given by:
RINTFC
.
∆VATT
V
IOUT
=
INTFC
R + R
F
Even if RF and RINTFC are designed to match, the two individual
resistance values will most likely drift by different amounts over
+5 V
Pin 3 Pin 4
VCC
Pin 8
IP–
IP–
Allegro ACS706
Application 5. When a low pass filter is construct-
ed externally to a standard Hall effect device,
a resistive divider may exist between the filter
resistor, RF, and the resistance of the custom-
er interface circuit, RINTFC. This resistive divider
will cause excessive attenuation, as given by the
Voltage
Regulator
To all subcircuits
VIOUT
Pin 7
Resistive Divider
Input
RF
Amp
Out
Application
Interface
Circuit
N.C.
Pin 6
0.1 MF
transfer function for ∆VATT
.
Low Pass Filter
CF
Temperature
Coefficient
Gain
Offset
RINTFC
Trim Control
GND
Pin 5
IP+
Pin 1 Pin 2
IP+
+5 V
VCC
Pin 8
Allegro ACS713
Application 6. Using the FILTER pin
provided on the ACS713 eliminates
the attenuation effects of the resis-
Hall Current
Drive
IP+
Pin 1
Sense Temperature
Coefficient Trim
tor divider between RF and RINTFC
,
shown in Application 5.
IP+
Pin 2
Buffer Amplifier
and Resistor
Signal
Recovery
VIOUT
Pin 7
Input
Application
Interface
Circuit
IP–
Pin 3
Sense
Trim
IP–
Pin 4
0 Ampere
Offset Adjust
RINTFC
GND
Pin 5
FILTER
Pin 6
CF
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
9
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
5.00 .197
4.80 .189
8º
0º
A
B
8
0.25 .010
0.17 .007
Preliminary dimensions, for reference only
Dimensions in millimeters
U.S. Customary dimensions (in.) in brackets, for reference only
4.00 .157
3.80 .150
(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
Terminal #1 mark area
1.27 .050
0.40 .016
A
A
1
2
0.25 .010
C
8X
SEATING PLANE
GAUGE PLANE
SEATING
PLANE
0.10 [.004]
C
0.51 .020
0.31 .012
0.25 [.010] M
1.75 .069
1.35 .053
8X
C A B
0.25 .010
0.10 .004
1.27 .050
1
2
3
4
8
7
6
5
Package Branding
Two alternative patterns are used
ACS
713
T
Allegro Current Sensor
Device family number
ACS
713
T
Allegro Current Sensor
Device family number
Indicator of 100% matte tin leadframe plating
Operating ambient temperature range code
Package type designator
Indicator of 100% matte tin leadframe plating
Operating ambient temperature range code
Package type designator
ACS713T
RLCPPP
L...L
ACS713T
RLCPPP
YYWWA
R
R
LC
PPP
YY
WW
A
LC
Primary sensed current
PPP
L...L
YY
Primary sensed current
YYWW
Date code: Calendar year (last two digits)
Date code: Calendar week
Lot code
Date code: Calendar year (last two digits)
Date code: Calendar week
Date code: Shift code
WW
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;
or manufacturability of its products. Before placing an order, the
user is cautioned to verify that the information being relied upon
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; is current.
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,
The information included herein is believed to be accurate and re-
liable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility 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
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
10
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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