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PDF ACS758xCB Data sheet ( Hoja de datos )
| Número de pieza | ACS758xCB | |
| Descripción | Linear Current Sensor | |
| Fabricantes | Allegro Micro Systems | |
| Logotipo |  |
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ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 µΩ Current Conductor
FEATURES AND BENEFITS
• Industry-leading noise performance through proprietary
amplifier and filter design techniques
• Integrated shield greatly reduces capacitive coupling
from current conductor to die due to high dV/dt signals,
and prevents offset drift in high-side, high voltage
applications
• Total output error improvement through gain and offset
trim over temperature
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Ultra-low power loss: 100 µΩ internal conductor
resistance
• Galvanic isolation allows use in economical, high-side
current sensing in high voltage systems
• AEC Q-100 qualified
Continued on the next page…
TÜV AmericaTytpeested
Certificate Number:
U8V 14 05 54214 028
UL Certified
File No.: E316429
PACKAGE: 5-PIN CB PACAKGE
PFF
Leadform
PSF
Leadform
PSS
Leadform
DESCRIPTION
The Allegro™ ACS758 family of current sensor ICs provides
economical and precise solutions forAC or DC current sensing.
Typical applications include motor control, load detection and
management, power supply and DC-to-DC converter control,
inverter control, and overcurrent fault detection.
The device consists of a precision, low-offset linear Hall
circuit with a copper conduction path located near the die.
Applied current flowing through this copper conduction path
generates a magnetic field which the Hall IC converts into a
proportional voltage. Device accuracy is optimized through the
close proximity of the magnetic signal to the Hall transducer.
A precise, proportional output voltage is provided by the
low-offset, chopper-stabilized BiCMOS Hall IC, which is
programmed for accuracy at the factory.
High level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, provides low output voltage ripple and low offset
drift in high-side, high voltage applications.
The output of the device has a positive slope (>VCC / 2) when an
increasing current flows through the primary copper conduction
path (from terminal 4 to terminal 5), which is the path used
for current sampling. The internal resistance of this conductive
path is 100 µΩ 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
Continued on the next page…
ACS758-DS, Rev. 9
+3.3 or 5 V
4 IP+
1
VCC
ACS758
IP GND 2
5
IP– VIOUT 3
CBYP
0.1 µF
CF
RF
VOUT
Application 1: The ACS758 outputs an analog signal, VOUT ,
that varies linearly with the uni- or bi-directional AC or DC
primary sampled current, IP , within the range specified. CF is
for optimal noise management, with values that depend on
the application.
Typical Application
1 page  
ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 µΩ Current Conductor
IP+ VCC
To all subcircuits
+3.3 to 5 V
Amp
VIOUT
Out
0.1 µF
Gain
Gain
Temperature
Coefficient
Offset
Offset
Temperature
Coefficient
IP– GND
Trim Control
Functional Block Diagram
IP+ 4
IP– 5
3 VIOUT
2 GND
1 VCC
Pin-out Diagram
Terminal List Table
Number
Name
1 VCC
2 GND
3 VIOUT
4 IP+
5 IP–
Description
Device power supply terminal
Signal ground terminal
Analog output signal
Terminal for current being sampled
Terminal for current being sampled
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 µΩ Current Conductor
Accuracy Data
CHARACTERISTIC PERFORMANCE DATA
Data taken using the ACS758LCB-50B
Electrical Offset Voltage versus Ambient Temperature
30
20
10
0
-10
-20
-30
-40
-50
–50 -25 0 25 50 75 100 125 150
TA (°C)
42.0
42.5
41.0
40.5
40.0
39.5
39.0
38.5
–50
Sensitivity versus Ambient Temperature
-25 0
25 50 75 100 125
TA (°C)
150
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
–50
Nonlinearity versus Ambient Temperature
-25 0 25 50 75 100 125
TA (°C)
150
100.40
100.35
100.30
100.25
100.20
100.15
100.10
100.05
100.00
99.95
–50
Symmetry versus Ambient Temperature
-25 0
25 50 75 100 125
TA (°C)
150
Magnetic Offset Error versus Ambient Temperature
140
120
100
80
60
40
20
0
–50 -25 0 25 50 75 100 125 150
TA (°C)
Total Output Error versus Ambient Temperature
6
5
4
3
2
1
0
-1
-2
-3
-4
–50
-25
0
25 50 75 100 125 150
TA (°C)
Typical Maximum Limit
Mean
Typical Minimum Limit
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ACS758xCB.PDF ] | |
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