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PDF ACS710 Data sheet ( Hoja de datos )
| Número de pieza | ACS710 | |
| Descripción | 120 kHz Bandwidth High Voltage Isolation Current Sensor | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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ACS710
120 kHz Bandwidth, High-Voltage Isolation
Current Sensor with Integrated Overcurrent Detection
Features and Benefits
▪ Industry-leading noise performance with greatly improved
bandwidth through proprietary amplifier and filter design
techniques
▪ Small footprint package suitable for space-constrained
applications
▪ 1 mΩ primary conductor resistance for low power loss
▪ High isolation voltage, suitable for line-powered
applications
▪ User-adjustable Overcurrent Fault level
▪ Overcurrent Fault signal typically responds to an
overcurrent condition in < 2 μs
▪ Integrated shield virtually eliminates capacitive coupling
from current conductor to die due to high dV/dt voltage
transients
▪ Filter pin capacitor improves resolution in low bandwidth
applications
▪ 3 to 5.5 V single supply operation
▪ Factory-trimmed sensitivity and quiescent output voltage
▪ Chopper stabilization results in extremely stable quiescent
output voltage
▪ Ratiometric output from supply voltage
CB Certificate Number:
US-23711-UL
Package: 16-Pin SOIC Hall-Effect IC
Package (suffix LA)
Not to scale
Description
TheAllegro™ACS710 current sensor provides economical and
precise means for current sensing applications in industrial,
commercial, and communications systems.The device is offered
in a small footprint surface-mount package that allows easy
implementation in customer applications.
TheACS710 consists of a precision linear Hall sensor integrated
circuit with a copper conduction path located near the surface
of the silicon die. Applied current flows through the copper
conduction path, and the analog output voltage from the Hall
sensor linearly tracks the magnetic field generated by the
applied current. The accuracy of the ACS710 is maximized
with this patented packaging configuration because the Hall
element is situated in extremely close proximity to the current
to be measured.
High-level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, results in low ripple on the output and low offset
drift in high-side, high-voltage applications.
The voltage on the Overcurrent Input (VOC pin) allows
customers to define an overcurrent fault threshold for the device.
When the current flowing through the copper conduction path
(between the IP+ and IP– pins) exceeds this threshold, the open
drain Overcurrent Fault pin will transition to a logic low state.
Factory programming of the linear Hall sensor inside of the
ACS710 results in exceptional accuracy in both analog and
digital output signals.
The internal resistance of the copper path used for current
sensing is typically 1 mΩ, for low power loss. Also, the current
conduction path is electrically isolated from the low-voltage
Continued on the next page…
Typical Application Circuit
VCC
1 IP+
FAULT_EN 16 Fault_EN
RH
IP
2 IP+
3 IP+
4 IP+
5 IP–
6 IP–
ACS710
VOC
VCC
15
14
FAULT 13
VIOUT 12
FILTER 11
COC
VIOUT
RL
RPU
B
0.1 µF
RH, RL
CF
COC
A
Sets resistor divider reference for VOC
Noise and bandwidth limiting filter capacitor
Fault delay setting capacitor, 22 nF maximum
Use of capacitor required
Use of resistor optional, 330 kΩ recommended.
7 IP–
8 IP–
VZCR 10
GND 9
1 nF
A
CF
B If used, resistor must be connected between
¯F¯ ¯A ¯U¯¯L¯ ¯T¯ pin and VCC.
ACS710-DS, Rev. 10
1 page  
ACS710
120 kHz Bandwidth, High-Voltage Isolation
Current Sensor with Integrated Overcurrent Detection
Functional Block Diagram
Non-Latching Version
VCC
VOC
FAULT_EN
IP+
IP–
Hall
Bias
POR
–
+ 2VREF
Sensitivity
Trim
Fault
Comparator
FAULT Reset
OC Fault
Signal
Recovery
Hall
Amplifier
GND
RF(INT)
VOUT(Q)
Trim
FILTER
Drain
FAULT
3 mA
VZCR
VIOUT
Pin-Out Diagram
IP+ 1
IP+ 2
IP+ 3
IP+ 4
IP– 5
IP– 6
IP– 7
IP– 8
16 FAULT_EN
15 VOC
14 VCC
13 FAULT
12 VIOUT
11 FILTER
10 VZCR
9 GND
Terminal List Table, Non-Latching Version
Number
Name
Description
1,2,3,4
IP+
Sensed current copper conduction path pins. Terminals for current being sensed;
fused internally, loop to IP– pins; unidirectional or bidirectional current flow.
5,6,7,8
IP–
Sensed current copper conduction path pins. Terminals for current being sensed;
fused internally, loop to IP+ pins; unidirectional or bidirectional current flow.
9 GND Device ground connection.
10
VZCR
Voltage Reference Output pin. Zero current (0 A) reference; output voltage on this
pin scales with VCC . (Not a highly accurate reference.)
11
FILTER
Filter pin. Terminal for an external capacitor connected from this pin to GND to set
the device bandwidth.
12
VIOUT
Analog Output pin. Output voltage on this pin is proportional to current flowing
through the loop between the IP+ pins and IP– pins.
13
¯F¯ ¯A ¯U¯¯L¯ ¯T¯
Overcurrent Fault pin. When current flowing between IP+ pins and IP– pins
exceeds the overcurrent fault threshold, this pin transitions to a logic low state.
14 VCC Supply voltage.
15
VOC
Overcurrent Input pin. Analog input voltage on this pin sets the overcurrent fault
threshold.
16 FAULT_EN Enables overcurrent faulting when high.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
ACS710
120 kHz Bandwidth, High-Voltage Isolation
Current Sensor with Integrated Overcurrent Detection
Characteristic Performance Data
Data taken using the ACS710-6BB
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
50
40
30
20
10
0
-10
-20
-30
-40
-50
–50 -25 0 25 50 75 100 125 150
TA (°C)
160.0
157.5
155.0
152.5
150.0
147.5
145.0
142.5
140.0
–50
Sensitivity versus Ambient Temperature
-25 0 25 50 75 100 125
TA (°C)
150
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
–50
Nonlinearity versus Ambient Temperature
-25 0 25 50 75 100 125 150
TA (°C)
101.00
100.75
100.50
100.25
100.00
99.75
99.50
99.25
99.00
–50
Symmetry versus Ambient Temperature
-25 0 25 50 75 100 125
TA (°C)
150
Total Output Error versus Ambient Temperature
6.0
4.5
3.0
1.5
0
-1.5
-3.0
-4.5
-6.0
–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 23 Páginas | |
| PDF Descargar | [ Datasheet ACS710.PDF ] | |
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