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PDF ACS714 Data sheet ( Hoja de datos )
| Número de pieza | ACS714 | |
| Descripción | Hall Effect-Based Linear Current Sensor | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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ACS714
Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Features and Benefits
▪ Low-noise analog signal path
▪ Device bandwidth is set via the FILTER pin
▪ 5 μs output rise time in response to step input current
▪ 80 kHz bandwidth
▪ Total output error 1.5% typical, 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
▪ Operating temperature range, –40°C to 150°C
TÜV America
Certificate Number:
U8V 06 05 54214 010
Package: 8 pin SOIC (suffix LC)
Approximate Scale 1:1
Description
The Allegro™ ACS714 provides economical and precise
solutions for AC or DC current sensing in automotive 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 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
the device at up to 5× overcurrent conditions. The terminals of
Continued on the next page…
Typical Application
ACS714-DS, Rev. 9
1 IP+
8
VCC
2 IP+
7
VIOUT
IP ACS714
3
IP–
FILTER
6
4 IP– GND 5
+5 V
VOUT
CBYP
0.1 μF
CF
1 nF
Application 1. The ACS714 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  
ACS714
Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
x05B PERFORMANCE CHARACTERISTICS1 over Range E: 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
Electrical Output Voltage
VOE IP = 0 A
–40 –
40
mV
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.
x05B PERFORMANCE CHARACTERISTICS1 over Range L: TA = –40°C to 150°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
– 185 –
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
Electrical Output Voltage
VOE IP = 0 A
–60 –
60
mV
Total Output Error2
ETOT
IP =±5 A, TA = 25°C
IP =±5 A, TA = –40°C to 150°C
– ±1.5
–7 –
–
7
%
%
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.
Allegro MicroSystems, LLC
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
5 Page 
ACS714
Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
Characteristic Performance
IP = 30 A, unless otherwise specified
Mean Supply Current versus Ambient Temperature
9.6
Supply Current versus Supply Voltage
10.2
9.5
9.4
9.3 VCC = 5 V
9.2
9.1
10.0
9.8
9.6
9.4
9.0 9.2
8.9
-50 -25 0 25 50 75 100 125 150
TA (°C)
Magnetic Offset versus Ambient Temperature
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
VCC = 5 V; IP = 0 A,
After excursion to 20 A
–3.5
–4.0
–4.5
–5.0
-50 -25
0
25 50 75 100 125 150
TA (°C)
Mean Total Output Error versus Ambient Temperature
8
6
4
2
0
–2
–4
–6
–8
–50 –25
0
25 50 75 100 125 150
TA (°C)
Output Voltage versus Sensed Current
5.0
4.5
4.0
3.5 VCC = 5 V
3.0
2.5 TA (°C)
2.0
–40
–20
1.5 25
1.0 85
0.5 125
0
–30 –20 –10
0
10 20 30
IP (A)
0 A Output Voltage versus Ambient Temperature
2535
2530
2525
2520
2515
IP = 0 A
2510
2505
2500
2495
2490
2485
-50 -25
0
25 50 75 100 125 150
TA (°C)
9.0
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
VCC (V)
Nonlinearity versus Ambient Temperature
0.45
0.40
0.35
0.30
0.25
VCC = 5 V
0.20
0.15
0.10
0.05
0
–50 –25
0
25 50 75 100 125 150
TA (°C)
Sensitivity versus Ambient Temperature
66.6
66.5
66.4
66.3
66.2
66.1
66.0
65.9
65.8
65.7
–50 –25
0
25 50 75 100 125 150
TA (°C)
Sensitivity versus Sensed Current
70.00
69.00
68.00
67.00
66.00
65.00
64.00
63.00
62.00
61.00
TA (°C)
–40
25
85
150
60.00
–30 –20 –10
0
10 20 30
Ip (A)
0 A Output Voltage Current versus Ambient Temperature
0.35
0.30
0.25
0.20
0.15
IP = 0 A
0.10
0.05
0
–0.05
–0.10
–0.15
-50 -25
0
25 50 75 100 125 150
TA (°C)
Allegro MicroSystems, LLC
11
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ACS714.PDF ] | |
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