ACS723 Current Sensor Datasheet

ACS723 Datasheet, PDF, Equivalent


Part Number

ACS723

Description

Galvanically Isolated Current Sensor

Manufacture

Allegro MicroSystems

Total Page 24 Pages
Datasheet
Download ACS723 Datasheet


ACS723
ACS723
High-Accuracy, Galvanically Isolated Current Sensor IC
with Small Footprint SOIC8 Package
FEATURES AND BENEFITS
• Patented integrated digital temperature compensation
circuitry allows for near closed loop accuracy over
temperature in an open loop sensor
• UL60950-1 (ed. 2) certified
□Dielectric Strength Voltage = 2.4 kVrms
□Basic Isolation Working Voltage = 420 Vpk / 297 Vrms
• Industry-leading noise performance with greatly
improved bandwidth through proprietary amplifier and
filter design techniques
• Pin-selectable bandwidth: 80 kHz for high bandwidth
applications or 20 kHz for low-noise performance
0.65 mΩ primary conductor resistance for low power
loss and high inrush current withstand capability
• Small footprint, low-profile SOIC8 package suitable for
space-constrained applications
• Integrated shield virtually eliminates capacitive
coupling from current conductor to die, greatly
suppressing output noise due to high dv/dt transients
• 4.5 to 5.5 V, single supply operation
• Output voltage proportional to AC or DC current
• Factory-trimmed sensitivity and quiescent output voltage
for improved accuracy
Continued on the next page…
TÜV America
Certificate Number:
U8V 18 02 54214 041
CB 14 11 54214 031
PACKAGE: 8-pin SOIC (suff ix LC)
UL Certified File
No.: US-32848-UL
DESCRIPTION
The AllegroACS723 current sensor IC is an economical and
precise solution for AC or DC current sensing in industrial,
commercial, and communications systems. The small package
is ideal for space constrained applications while also saving
costs due to reduced board area. 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 field to the Hall transducer. A precise, proportional
voltage is provided by the low-offset, chopper-stabilized
BiCMOS Hall IC, which includes Allegro’s patented digital
temperature compensation, resulting in extremely accurate
performance over temperature. The output of the device has
a positive slope 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 0.65 mΩ typical, providing
low power loss.
The terminals of the conductive path are electrically isolated
from the sensor leads (pins 5 through 8). This allows the
ACS723 current sensor IC to be used in high-side current sense
applications without the use of high-side differential amplifiers
or other costly isolation techniques.
Continued on the next page…
Not to scale
ACS723-DS, Rev. 6
MCO-0000538
1
IP+
8
VCC
+IP ACS723
2 IP+
7
VIOUT
IP
3 IP–
–IP
4
IP–
6
BW_SEL
GND 5
CL
Typical Application
CBYPASS
0.1 µF
The ACS723 outputs an
analog signal, VIOUT , that
changes, proportionally,
with the bidirectional AC or
DC primary sensed current,
IP , within the specified
measurement range. The
BW_SEL pin can be used
to select one of the two
bandwidths to optimize the
noise performance. Grounding
the BW_SEL pin puts the part
in the high bandwidth, 80 kHz,
mode.
September 3, 2019

ACS723
ACS723
High-Accuracy, Galvanically Isolated Current Sensor IC
with Small Footprint SOIC8 Package
FEATURES AND BENEFITS (continued)
DESCRIPTION (continued)
• Chopper stabilization results in extremely stable quiescent
output voltage
• Nearly zero magnetic hysteresis
• Ratiometric output from supply voltage
The ACS723 is provided in a small, low-profile 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
ACS723LLCTR-05AB-T [2]
ACS723LLCTR-10AU-T [2]
ACS723LLCTR-10AB-T [2]
ACS723LLCTR-20AU-T [2]
ACS723LLCTR-20AB-T [2]
ACS723LLCTR-40AU-T [2]
ACS723LLCTR-40AB-T [2]
ACS723LLCTR-50AB-T [2]
IPR
(A)
±5
10
±10
20
±20
40
±40
±50
Sens(Typ)
at VCC = 5 V
(mV/A)
400
200
100
50
40
TA
(°C)
–40 to 150
Packing [1]
Tape and Reel, 3000 pieces per reel
[1] Contact Allegro for additional packing options.
[2] Variant not intended for automotive applications.
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2


Features ACS723 High-Accuracy, Galvanically Isola ted Current Sensor IC with Small Footpr int SOIC8 Package FEATURES AND BENEFIT S • Patented integrated digital temp erature compensation circuitry allows f or near closed loop accuracy over tempe rature in an open loop sensor • UL60 950-1 (ed. 2) certified □□Dielectri c Strength Voltage = 2.4 kVrms □□Ba sic Isolation Working Voltage = 420 Vpk  / 297 Vrms • Industry-leading noise performance with greatly improved bandwidth through proprietary amplifie r and filter design techniques • Pi n-selectable bandwidth: 80 kHz for high bandwidth applications or 20 kHz for l ow-noise performance • 0.65 mΩ pri mary conductor resistance for low power loss and high inrush current withstand capability • Small footprint, low-p rofile SOIC8 package suitable for space -constrained applications • Integrat ed shield virtually eliminates capaciti ve coupling from current conductor to d ie, greatly suppressing output noise due to high dv/dt transients • 4.5 to 5.5 V, single sup.
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