ACS723 Datasheet PDF - Allegro MicroSystems
| Part Number | ACS723 | |
| Description | Galvanically Isolated Current Sensor IC | |
| Manufacturers | Allegro MicroSystems | |
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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 band width: 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
Continued on the next page…
Package: 8-pin SOIC (suff ix LC)
DESCRIPTION
The Allegro™ ACS723 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.
Approximate Scale 1:1
Continued on the next page…
ACS723-DS
1
IP+
8
VCC
+IP ACS723
2 IP+
7
VIOUT
IP
3 IP–
–IP
4
IP–
6
BW_SEL
GND 5
The ACS723 outputs an
analog signal, VIOUT , that
changes, proportionally,
with the bidirectional AC or
DC primary sensed current,
CBYPASS
0.1 µF
IP , within the specified
measurement range. The
BW_SEL pin can be used
to select one of the two
CL
bandwidths to optimize the
noise performance.
Typical Application
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ACS723
High Accuracy, Galvanically Isolated Current Sensor IC
With Small Footprint SOIC8 Package
Pin-out Diagram and Terminal List
IP+ 1
IP+ 2
IP– 3
IP– 4
8 VCC
7 VIOUT
6 BW_SEL
5 GND
Pin-out Diagram
Terminal List Table
Number
1, 2
Name
IP+
3, 4 IP–
5 GND
6 BW_SEL
7 VIOUT
8 VCC
Description
Terminals for current being sensed; fused internally
Terminals for current being sensed; fused internally
Signal ground terminal
Terminal for selecting 20 kHz or 80 kHz bandwidth
Analog output signal
Device power supply terminal
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ACS723 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ACS723.PDF Datasheet ] | |
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