ACS730LLC
Automotive-Grade, 1 MHz Bandwidth, Galvanically Isolated
Current Sensor IC in Small Footprint SOIC8 Package
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified
• Industry-leading noise performance with greatly
improved bandwidth through proprietary amplifier and
filter design techniques
• High bandwidth 1 MHz analog output
• Patented integrated digital temperature compensation
circuitry allows high accuracy over temperature in an
open loop sensor
• 1.2 mΩ primary conductor resistance for low power loss
and high inrush current withstanding capability
• Small footprint, low-profile SOIC8 package suitable for
space-constrained applications
• Integrated shield virtually eliminates capacitive coupling
from current conductor to die due to high dV/dt voltage
transients
• 5 V single supply operation
• Output voltage proportional to AC or DC current
• Factory-trimmed sensitivity and quiescent output voltage
for improved accuracy
• High PSRR for noisy environments
PACKAGE: 8-Pin SOIC (suffix LC)
TÜV America
Certificate Number:
U8V 14 11 54214 032
CB 14 11 54214 031
Not to scale
CB Certificate Number:
US-22334-A2-UL
DESCRIPTION
The Allegro™ ACS730 current sensor family provides
economical and precise solutions forAC or DC current sensing
in automotive, industrial, commercial, and communications
systems. The device package allows for easy implementation
by the customer. Typical applications include include on-board
chargers (OBC), DC-to-DC converters, 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 Hall IC, which is programmed for accuracy
after packaging. 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 typically 1.2 mΩ, providing low power loss.
The terminals of the conductive path are electrically isolated
from the sensor leads (pins 5 through 8). This allows the
ACS730 current sensor to be used in high-side current sense
applications without the use of high-side differential amplifiers
or other costly isolation techniques.
TheACS730 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.
ACS730LLC-DS, Rev. 2
MCO-0000558
1 IP+
2 IP+
VCC 8
ACS730
VIOUT 7
IP
3 IP–
VZCR 6
4 IP–
GND 5
CVZCR
1 nF
CBYPASS
0.1 µF
The ACS730 outputs an
analog signal, VIOUT, that
varies linearly with the
bidirectional AC or DC
primary sensed current,
IP, within the range speci-
fied.
Typical Application
August 21, 2019
