|
|
PDF ACS712 Data sheet ( Hoja de datos )
| Número de pieza | ACS712 | |
| Descripción | Fully Integrated / Hall Effect-Based Linear Current Sensor | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
|
 1. Hall Effect-Based Linear Current Sensor  Hay una vista previa y un enlace de descarga de ACS712 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
ACS712
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
Features and Benefits
▪ Low-noise analog signal path
▪ Device bandwidth is set via the new FILTER pin
▪ 5 μs output rise time in response to step input current
▪ 80 kHz bandwidth
▪ Total output error 1.5% at TA= 25°C
▪ Small footprint, low-profile SOIC8 package
▪ 1.2 mΩ internal conductor resistance
▪ 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8
▪ 5.0 V, single supply operation
▪ 66 to 185 mV/A output sensitivity
▪ Output voltage proportional to AC or DC currents
▪ Factory-trimmed for accuracy
▪ Extremely stable output offset voltage
▪ Nearly zero magnetic hysteresis
▪ Ratiometric output from supply voltage
TÜV America
Certificate Number:
U8V 06 05 54214 010
Package: 8 Lead SOIC (suffix LC)
Description
The Allegro™ ACS712 provides economical and precise
solutionsforACorDCcurrentsensinginindustrial, commercial,
and communications systems. The device package allows for
easy implementation by the customer. Typical applications
include motor control, load detection and management, switch-
mode power supplies, and overcurrent fault protection. The
device is not intended for automotive applications.
The device consists of a precise, low-offset, linear Hall 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 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 voltage is provided by the low-offset,
chopper-stabilized BiCMOS Hall IC, which is programmed
for accuracy after packaging.
The output of the device has a positive slope (>VIOUT(Q))
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 sampling. The internal resistance of
this conductive path is 1.2 mΩ typical, providing low power
loss. The thickness of the copper conductor allows survival of
Continued on the next page…
Approximate Scale 1:1
ACS712-DS, Rev. 15
Typical Application
1 IP+
8
VCC
2 IP+
7
VIOUT
IP ACS712
3 IP– FILTER 6
4 IP– GND 5
+5 V
VOUT
CBYP
0.1 μF
CF
1 nF
Application 1. The ACS712 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 recommended for noise management, with values that
depend on the application.
1 page  
ACS712
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
x05B PERFORMANCE CHARACTERISTICS1 TA = –40°C to 85°C, CF = 1 nF, and VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min. Typ.
Max.
Units
Optimized Accuracy Range
IP
–5 –
5
A
Sensitivity
Sens Over full range of IP, TA = 25°C
180 185 190
mV/A
Noise
VNOISE(PP)
Peak-to-peak, TA = 25°C, 185 mV/A programmed Sensitivity,
CF = 47 nF, COUT = open, 2 kHz bandwidth
–
21
–
mV
Zero Current Output Slope
∆VOUT(Q)
TA = –40°C to 25°C
TA = 25°C to 150°C
– –0.26 –
– –0.08 –
mV/°C
mV/°C
Sensitivity Slope
∆Sens
TA = –40°C to 25°C
TA = 25°C to 150°C
–
0.054
–
– –0.008 –
mV/A/°C
mV/A/°C
Total Output Error2
ETOT IP =±5 A, TA = 25°C
– ±1.5 –
%
1Device may be operated at higher primary current levels, IP, and ambient temperatures, TA, provided that the Maximum Junction Temperature, TJ(max),
is not exceeded.
2Percentage of IP, with IP = 5 A. Output filtered.
x20A PERFORMANCE CHARACTERISTICS1 TA = –40°C to 85°C, CF = 1 nF, and VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min. Typ.
Max.
Units
Optimized Accuracy Range
IP
–20 –
20
A
Sensitivity
Sens Over full range of IP, TA = 25°C
96 100 104
mV/A
Noise
VNOISE(PP)
Peak-to-peak, TA = 25°C, 100 mV/A programmed Sensitivity,
CF = 47 nF, COUT = open, 2 kHz bandwidth
–
11
–
mV
Zero Current Output Slope
∆VOUT(Q)
TA = –40°C to 25°C
TA = 25°C to 150°C
– –0.34 –
– –0.07 –
mV/°C
mV/°C
Sensitivity Slope
∆Sens
TA = –40°C to 25°C
TA = 25°C to 150°C
–
0.017
–
– –0.004 –
mV/A/°C
mV/A/°C
Total Output Error2
ETOT IP =±20 A, TA = 25°C
– ±1.5 –
%
1Device may be operated at higher primary current levels, IP, and ambient temperatures, TA, provided that the Maximum Junction Temperature,
TJ(max), is not exceeded.
2Percentage of IP, with IP = 20 A. Output filtered.
x30A PERFORMANCE CHARACTERISTICS1 TA = –40°C to 85°C, CF = 1 nF, and VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min. Typ.
Max.
Units
Optimized Accuracy Range
IP
–30 –
30
A
Sensitivity
Sens Over full range of IP, TA = 25°C
63 66 69
mV/A
Noise
VNOISE(PP)
Peak-to-peak, TA = 25°C, 66 mV/A programmed Sensitivity,
CF = 47 nF, COUT = open, 2 kHz bandwidth
–
7
–
mV
Zero Current Output Slope
∆VOUT(Q)
TA = –40°C to 25°C
TA = 25°C to 150°C
– –0.35 –
– –0.08 –
mV/°C
mV/°C
Sensitivity Slope
∆Sens
TA = –40°C to 25°C
TA = 25°C to 150°C
–
0.007
–
– –0.002 –
mV/A/°C
mV/A/°C
Total Output Error2
ETOT IP = ±30 A, TA = 25°C
– ±1.5 –
%
1Device may be operated at higher primary current levels, IP, and ambient temperatures, TA, provided that the Maximum Junction Temperature,
TJ(max), is not exceeded.
2Percentage of IP, with IP = 30 A. Output filtered.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
ACS712
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
Chopper Stabilization Technique
Chopper Stabilization is an innovative circuit technique that is
used to minimize the offset voltage of a Hall element and an asso-
ciated on-chip amplifier. Allegro patented a Chopper Stabiliza-
tion technique that nearly eliminates Hall IC output drift induced
by temperature or package stress effects. This offset reduction
technique is based on a signal modulation-demodulation process.
Modulation is used to separate the undesired DC offset signal
from the magnetically induced signal in the frequency domain.
Then, using a low-pass filter, the modulated DC offset is sup-
pressed while the magnetically induced signal passes through
the filter. As a result of this chopper stabilization approach, the
output voltage from the Hall IC is desensitized to the effects
of temperature and mechanical stress. This technique produces
devices that have an extremely stable Electrical Offset Voltage,
are immune to thermal stress, and have precise recoverability
after temperature cycling.
This technique is made possible through the use of a BiCMOS
process that allows the use of low-offset and low-noise amplifiers
in combination with high-density logic integration and sample
and hold circuits.
Regulator
Hall Element
Clock/Logic
Amp
Low-Pass
Filter
Concept of Chopper Stabilization Technique
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 15 Páginas | |
| PDF Descargar | [ Datasheet ACS712.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ACS710 | 120 kHz Bandwidth High Voltage Isolation Current Sensor | Allegro MicroSystems |
| ACS711 | Hall Effect Linear Current Sensor | Allegro MicroSystems |
| ACS712 | Fully Integrated / Hall Effect-Based Linear Current Sensor | Allegro MicroSystems |
| ACS713 | Fully Integrated Hall Effect-Based Linear Current Sensor IC | Allegro MicroSystems |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |