ACS704ELC-015
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ACS704015-DS, Rev. 2
AB SO LUTE MAX I MUM RAT INGS
Supply Voltage, V
CC
.......................................... 16 V
Reverse Supply Voltage, V
RCC
........................16 V
Output Voltage, V
OUT
........................................16 V
Reverse Output Voltage, V
ROUT
......................0.1 V
Output Current Source, I
OUT(Source)
................. 3 mA
Output Current Sink, I
OUT(Sink)
.......................10 mA
Operating Temperature,
Maximum
Junction,
T
J(max)
....................... 165C
Storage Temperature, T
S
......................65 to 170C
Pin 1: IP+
Pin 2: IP+
Pin 3: IP
Pin 4: IP
Pin 5: GND
Pin 6: VOUT
Pin 7: VOUT
Pin 8: VCC
Features and Benefits
Small footprint, low-profile SOIC8 package
1.5
m internal conductor resistance
Excellent replacement for sense resistors
800
V
RMS
minimum isolation voltage beween pins 1-4 and 5-8
4.5 to 5.5 V, single supply operation
50 kHz bandwidth
100 mV/A output sensitivity and 20 A dynamic range
Output voltage proportional to ac and dc currents
Factory-trimmed for accuracy
Extremely stable output offset voltage
Near-zero magnetic hysteresis
Ratiometric output from supply voltage
The Allegro ACS704 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, switched-mode 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 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 at the
factory.
The output of the device has a positive slope (>V
CC
/ 2) 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 typically 1.5 m, providing low power loss. The thickness
of the copper conductor allows survival of the device at up to 3 overcurrent
conditions. The terminals of the conductive path are electrically isolated from the
sensor leads (pins 5 through 8). This allows the ACS704 family of sensors to be
used in applications requiring electrical isolation without the use of opto-isolators
or other costly isolation techniques.
The ACS704 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 flip-chip uses high-tem-
perature Pb-based solder balls, currently exempt from RoHS and WEEE. The
device is fully calibrated prior to shipment from the factory.
Package LC
Use the following complete part number when ordering:
Part Number
Package
ACS704ELC-015
SOIC8 surface mount
TV America
Certificate Number:
U8V 04 12 54214 005
5
4
3
2
1
6
7
8
*
100 total pulses, 250 ms duration each, applied at a rate of
1 pulse every 100 seconds.
Nominal Operating Temperature, T
A
Range
E............................................ 40 to 85C
Overcurrent Transient Tolerance*, I
P
................ 60 A
Fully Integrated, Hall Effect-Based Linear Current Sensor
with Voltage Isolation and a Low-Resistance Current Conductor
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ACS704ELC015-DS, Rev. 2
ACS704ELC-015
ELECTRICAL CHARACTERISTICS,
over operating ambient temperature range unless otherwise stated
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Primary Sensed Current
1
I
P
15
15
A
Supply Voltage
V
CC
4.5
5.0
5.5
V
Supply Current
I
CC
V
CC
= 5.0 V, output open
5
8
10
mA
Output Resistance
R
OUT
I
OUT
= 1.2 mA
1
2
Output Capacitance Load
C
LOAD
VOUT to GND
10
nF
Output Resistive Load
R
LOAD
VOUT to GND
4.7
k
Primary Conductor Resistance
R
PRIMARY
T
A
= 25C
1.5
m
Isolation Voltage
V
ISO
Pins 1-4 and 5-8; 60 Hz, 1 minute
800
1200
V
PERFORMANCE CHARACTERISTICS, T
A
= 40C to 85C, V
CC
= 5 V unless otherwise specified
Propagation Time
t
PROP
I
P
=15 A, T
A
= 25C
4
s
Response Time
t
RESPONSE
I
P
=15 A, T
A
= 25C
8
s
Rise Time
t
r
I
P
=15 A, T
A
= 25C
9
s
Frequency Bandwidth
f
3 dB, T
A
= 25C; I
P
is 10 A peak-to-
peak; no external filter
50
kHz
Sensitivity
Sens
Over full range of I
P
,
I
P
applied for 5 ms; T
A
= 25C
100
mV/A
Over full range of I
P
,
I
P
applied for 5 ms; T
A
= 40 to 85C
94
106
mV/A
Noise
V
NOISE
Peak-to-peak, T
A
= 25C,
no external filter
70
mV
Root Mean Square, T
A
= 25C,
no external filter
12.5
mV
Nonlinearity
E
LIN
Over full range of I
P
,
I
P
applied for 5 ms; T
A
= 40 to 85C
1
3.5
%
Symmetry
E
SYM
Over full range of I
P
,
I
P
applied for 5 ms; T
A
= 40 to 85C
98
100
102
%
Zero Current Output Voltage
V
OUT(Q)
I
P
= 0 A, T
A
= 25C
V
CC
/ 2
V
Electrical Offset Voltage
V
OE
I
P
= 0 A, T
A
= 25C
15
15
mV
I
P
= 0 A, T
A
= 40 to 85C
50
50
mV
Magnetic Offset Error
I
ERROM
I
P
= 0 A, after excursion of 15 A;
T
A
= 40 to 85C
0.01
0.05
A
Total Output Error
2
E
TOT
I
P
=15 A
, I
P
applied for 5 ms;
T
A
= 25C
1.5
%
I
P
= 10 A
, I
P
applied for 5 ms;
T
A
= 40 to 85C
6.0
%
I
P
= 15 A
, I
P
applied for 5 ms;
T
A
= 40 to 85C
8.4
%
1
Device may be operated at higher primary current, I
P
, and Ambient Temperature, T
A
, levels, provided that the Maximum Junction Temperature, T
J(max)
,
is not exceeded.
2
Percentage of I
P
, with I
P
= 15 A; Output filtered. Up to a 2.0% shift in E
TOT
may be observed at end-of-life for this device.
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