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ACS71240KEXBTR-010B5-115

更新时间： 2024-02-01 04:24:51
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急速微 - ALLEGRO /
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21页 1490K
描述
Automotive-Grade, Galvanically Isolated Current Sensor IC with Common-Mode Field Rejection and Overcurrent Detection in Small Footprint Low-Profile Packages

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ACS71240  
Automotive-Grade, Galvanically Isolated Current Sensor IC  
with Common-Mode Field Rejection and Overcurrent Detection  
in Small Footprint Low-Profile Packages  
FEATURES AND BENEFITS  
DESCRIPTION  
• AEC-Q100 automotive qualified  
The Allegro™ ACS71240 current sensor IC is an economical  
• Differential Hall sensing rejects common-mode fields  
• Integrated shield virtually eliminates capacitive coupling  
from current conductor to die, greatly suppressing output  
noise due to high dv/dt transients  
• Industry-leading noise performance with greatly  
improved bandwidth through proprietary amplifier and  
filter design techniques  
• High bandwidth 120 kHz analog output for faster  
response times in control applications  
• Patented integrated digital temperature compensation  
circuitry allows for near closed-loop accuracy over  
temperature in an open loop sensor  
• Single supply operation with nonratiometric output at  
3.3 and 5 V options  
• Overcurrent FAULT available between 50% and 200% IP  
with 1.5 µs (typ) response time  
• Non-ratiometric output provides immunity to noisy supplies  
• Small footprint QFN-12 with wettable flank and SOIC-8  
suitable for space-constrained automotive applications  
• 0.6 mΩ (QFN-12) or 1.2 mΩ (SOIC-8) primary  
conductor resistance for low power loss and high inrush  
current withstand capability  
andprecisesolutionforACorDCcurrentsensinginindustrial,  
automotive, commercial, and communications 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 path  
generatesamagneticfieldwhichissensedbytheintegratedHall  
IC and converted into a proportional voltage. The resistance of  
the integrated conductor is far less than typical sense resistors,  
which reduces power loss and improves efficiency.  
Rejection of external common-mode magnetic fields is  
achieved through differential sensing, enabling high accuracy  
in magnetically noisy environments. A precise voltage  
proportional to the measured current is generated by the low-  
offset, chopper-stabilized Hall front end.  
Zero ampere output voltage and device sensitivity are  
programmed at theAllegro factory to provide a high accuracy  
solution across the full automotive temperature range.  
The ACS71240 includes an integrated fault comparator for  
simplified overcurrent detection. The ultrafast response time  
provides the system with ample time to detect and protect  
against short-circuit events.  
• UL certified package (SOIC-8 only) for voltage isolation  
TheACS71240isprovidedinsmall,low-profilesurface-mount  
packageoptions:QFN-12withwettableflankandSOIC-8.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-  
chiphigh-temperaturePb-basedsolderballs, currentlyexempt  
from RoHS. The device is fully calibrated prior to shipment  
from the factory.  
PACKAGES:  
12-contact QFN with wettable flank  
3 mm × 3 mm × 0.75 mm  
(EXB package)  
8-pin SOIC  
with internally fused path  
(LCB package)  
Not to scale  
V
CC  
VCC  
CBYP  
0.1 μF  
IP+  
IP+  
SOIC-8 ONLY  
TÜV America  
Certificate Number:  
U8V 14 11 54214 032  
CB 14 11 54214 031  
VIOUT  
CLOAD  
IP  
ACS71240  
RPU  
FAULT  
IP–  
CB Certificate Number:  
US-22334-A3-UL  
IP–  
GND  
Figure 1: Typical Application  
ACS71240-DS  
MCO-0000621  
March 7, 2019  
1234567...21

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