ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 Current Conductor
FEATURES AND BENEFITS DESCRIPTION
Industry-leading noise performance through proprietary The Allegro ACS758 family of current sensor ICs provides
amplifier and filter design techniques economical and precise solutions for AC or DC current sensing.
Integrated shield greatly reduces capacitive coupling Typical applications include motor control, load detection and
from current conductor to die due to high dV/dt signals, management, power supply and DC-to-DC converter control,
and prevents offset drift in high-side, high voltage inverter control, and overcurrent fault detection.
applications
The device consists of a precision, low-offset linear Hall
Total output error improvement through gain and offset
circuit with a copper conduction path located near the die.
trim over temperature
Applied current flowing through this copper conduction path
Small package size, with easy mounting capability
generates a magnetic field which the Hall IC converts into a
Monolithic Hall IC for high reliability
proportional voltage. Device accuracy is optimized through the
Ultra-low power loss: 100 internal conductor
close proximity of the magnetic signal to the Hall transducer.
resistance
A precise, proportional output voltage is provided by the
Galvanic isolation allows use in economical, high-side
low-offset, chopper-stabilized BiCMOS Hall IC, which is
current sensing in high voltage systems
programmed for accuracy at the factory.
AEC Q-100 qualified
High level immunity to current conductor dV/dt and stray
Continued on the next page
electric fields, offered by Allegro proprietary integrated shield
technology, provides low output voltage ripple and low offset
TV America
Certificate Number:
drift in high-side, high voltage applications.
U8V 14 05 54214 028
UL Certified
The output of the device has a positive slope (>V / 2) when an
File No.: E316429
CC
increasing current flows through the primary copper conduction
PACKAGE: 5-PIN CB PACAKGE
path (from terminal 4 to terminal 5), which is the path used
for current sampling. The internal resistance of this conductive
path is 100 typical, providing low power loss.
The thickness of the copper conductor allows survival of the
device at high overcurrent conditions. The terminals of the
conductive path are electrically isolated from the signal leads
PFF PSF PSS
Continued on the next page
Leadform Leadform Leadform
+3.3 or 5 V
1
4
VCC
IP+
C
BYP
ACS758
0.1 F
2
I
GND
P
C
F
5
IP
3
VIOUT
V
OUT
R
F
Application 1: The ACS758 outputs an analog signal, V ,
OUT
that varies linearly with the uni- or bi-directional AC or DC
primary sampled current, I , within the range specified. C is
P F
for optimal noise management, with values that depend on
the application.
Typical Application
ACS758-DS, Rev. 9
Type
testedThermally Enhanced, Fully Integrated, Hall Effect-Based
ACS758xCB
Linear Current Sensor IC with 100 Current Conductor
FEATURES AND BENEFITS (CONTINUED) DESCRIPTION (CONTINUED)
3.0 to 5.5 V, single supply operation (pins 1 through 3). This allows the ACS758 family of sensor ICs
120 kHz typical bandwidth to be used in applications requiring electrical isolation without the
3 s output rise time in response to step input current use of opto-isolators or other costly isolation techniques.
Output voltage proportional to AC or DC currents
The device is fully calibrated prior to shipment from the factory.
Factory-trimmed for accuracy
The ACS758 family is lead (Pb) free. All leads are plated with 100%
Extremely stable output offset voltage
matte tin, and there is no Pb inside the package. The heavy gauge
Nearly zero magnetic hysteresis
leadframe is made of oxygen-free copper.
Selection Guide
Package
Sensitivity
Primary Sampled
Current T
OP
1 2
Sens (Typ.)
Part Number Current , I Packing
P
Directionality (C)
Terminals Signal Pins
(A)
(mV/A)
ACS758LCB-050B-PFF-T Formed Formed 50 40. Bidirectional
ACS758LCB-050U-PFF-T Formed Formed 50 60. Unidirectional
ACS758LCB-100B-PFF-T Formed Formed 100 20. Bidirectional 40 to 150
ACS758LCB-100B-PSF-T Straight Formed 100 20. Bidirectional
ACS758LCB-100U-PFF-T Formed Formed 100 40. Unidirectional
ACS758KCB-150B-PFF-T Formed Formed 150 13.3 Bidirectional
34 pieces
per tube
ACS758KCB-150B-PSS-T Straight Straight 150 13.3 Bidirectional 40 to 125
ACS758KCB-150U-PFF-T Formed Formed 150 26.7 Unidirectional
ACS758ECB-200B-PFF-T Formed Formed 200 10. Bidirectional
ACS758ECB-200B-PSF-T Straight Formed 200 10. Bidirectional
40 to 85
ACS758ECB-200B-PSS-T Straight Straight 200 10. Bidirectional
ACS758ECB-200U-PFF-T Formed Formed 200 20. Unidirectional
1
Additional leadform options available for qualified volumes.
2
Contact Allegro for additional packing options.
Allegro MicroSystems, LLC
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com