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ACS722LLCTR-40AU-T2 PDF预览

ACS722LLCTR-40AU-T2

更新时间： 2024-02-28 11:51:42
品牌 Logo 应用领域
急速微 - ALLEGRO /
页数 文件大小 规格书
22页 692K
描述
High Accuracy, Galvanically Isolated Current Sensor IC With Small Footprint SOIC8 Package

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ACS722LLCTR-40AU-T2 数据手册

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ACS722  
High Accuracy, Galvanically Isolated Current Sensor IC  
With Small Footprint SOIC8 Package  
FEATURES AND BENEFITS  
DESCRIPTION  
• Patented integrated digital temperature compensation  
circuitry allows for near closed loop accuracy over  
temperature in an open loop sensor  
TheAllegro™ ACS722 current sensor IC is an economical and  
precise solution for AC or DC current sensing in industrial,  
commercial, andcommunicationssystems.Thesmallpackage  
is ideal for space constrained applications while also saving  
costs due to reduced board area. Typical applications include  
motorcontrol,loaddetectionandmanagement,switched-mode  
power supplies, and overcurrent fault protection.  
• 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  
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  
theintegratedHallICandconvertedintoaproportionalvoltage.  
Deviceaccuracyisoptimizedthroughthecloseproximityofthe  
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  
resistanceofthisconductivepathis0.65mΩtypical,providing  
low power loss.  
• Integrated shield virtually eliminates capacitive coupling  
from current conductor to die, greatly suppressing output  
noise due to high dv/dt transients  
• 3 to 3.6 V, single supply operation  
Continued on the next page…  
Package: 8-pin SOIC (suf ix LC)  
The terminals of the conductive path are electrically isolated  
from the sensor leads (pins 5 through 8). This allows the  
ACS722currentsensorICtobeusedinhigh-sidecurrentsense  
applicationswithouttheuseofhigh-sidedifferentialamplifiers  
CB Certi icate Number: or other costly isolation techniques.  
US-22334-A1-UL  
TheACS722 is provided in a small, low profile surface mount  
SOIC8 package. The leadframe is plated with 100% matte tin,  
Continued on the next page…  
Approximate Scale 1:1  
8
7
1
The ACS722 outputs an analog  
signal, VIOUT, that changes,  
proportionally, with the  
bidirectional AC or DC primary  
sensed current, IP, within  
IP+  
VCC  
+IP  
ACS722  
2
IP+  
VIOUT  
I
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.  
CBYPASS  
0.1 µF  
P
6
5
3
BW_SEL  
GND  
IP–  
–IP  
CL  
4
IP–  
Typical Application  
ACS722-DS, Rev. 2  
1234567...22

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