Current Sensor: ACS750xCA-075
31Oct03, CMG, Rev 2.0
1
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 2003, Allegro MicroSystems, Inc.
Pin 1: Vcc
Pin 2: Gnd
Pin 3: Output
Pin 4: Ip+
Pin 5: Ip-
ABSOLUTE MAXIMUM RATINGS
Operating Temperature
`S'.............................. -20 to +85C
`L'............................ -40 to +150C
Supply Voltage, Vcc
16V
Output Voltage
16V
Output Current Source
3mA
Output Current Sink
10mA
Maximum Storage Temperature
170C
Maximum Junction Temperature
165C
Thermal Resistance, R
JA
TBD C/W
The Allegro ACS750 family of current sensors provides
economical and precise solutions for current sensing in industrial,
commercial, automotive, and communications systems. The device
package allows for easy implementation by the customer. Typical
applications include motor control, load detection and management,
switched mode power supplies and over-current fault protection.
The sensor consists of a precision linear Hall IC optimized to an
internal magnetic circuit to increase device sensitivity. The
combination of a precisely controlled self-aligning assembly process
(patents pending) and the factory programmed precision of the
linear Hall sensor result in high level performance and product
uniformity.
The primary conductor used for current sensing (terminals 4 and 5)
is designed for extremely low power loss. The power terminals are
also electrically isolated from the sensor leads (pins 1 3). This
allows the ACS750 family of sensors to be used in applications
requiring electrical isolation without the use of opto-isolators or other
costly isolation techniques.
The output of the device has a positive slope (>Vcc/2) when an
increasing current flows from terminal 4 to terminal 5.
Features and Benefits
Monolithic Hall IC for High Reliability
Single +5V Supply
High Isolation Voltage
Lead-free
Automotive Temperature Range
End-of-line Factory Trimmed for Gain and Offset
Ultra-low Power Loss: Low Resistance of Primary Conductor
Ratiometric Output from Supply Voltage
Low Thermal Drift of Offset Voltage
On-chip Transient Protection
Small Package Size with Easy Mounting Capability
Applications
Automotive Systems
Industrial Systems
Motor Control
Servo Systems
Power Conversion
Battery Monitors
5
4
1 2 3
Always order by complete part number:
ACS750SCA-075 or
ACS750LCA-075
Current Sensor: ACS750xCA-075
31Oct03, CMG, Rev 2.0
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 2003, Allegro MicroSystems, Inc.
Characteristic Symbol Test
Conditions
Limits
ELECTRICAL CHARACTERISTICS,
over temperature unless otherwise stated
Min. Typ. Max. Units
Primary Sensed Current
I
P
-75
75 A
Supply Voltage
V
CC
4.5
5.0
5.5
V
Supply Current
I
CC
V
cc
= 5.0V, output open
7
10
mA
Output Resistance
R
OUT
Iout = 1.2 mA
1
2
Primary Conductor
Resistance
R
PRIMARY
I
P
=
100A; +25C
130
Isolation Voltage
V
ISO
Pins 1-3 and 4-5,
60 Hz, 1 minute
2.5 kV
PERFORMANCE CHARACTERISTICS, -20 C to +85 C, Vcc = 5V unless otherwise specified
Propagation time
t
PROP
I
P
=
50A (75A TBD)
4
Response time
t
RESPONSE
I
P
=
50A (75A TBD)
27
Rise time
t
r
I
P
=
50A (75A TBD)
26
s
Frequency Bandwidth
f
-3dB
13
kHz
I
P
, T = +25C
18.75 19.75 20.75 mV/A
Sensitivity Sens
I
P
, Over Temperature
17.5 21.5
mV/A
Noise V
NOISE
Peak-to-Peak; T = +25C
External Filter BW = 24kHz
7 mV
Non-linearity E
L
I
P
+/-
5
%
Symmetry E
S
I
P
97 100 103 %
I = 0A, T = +25C
-40
Vcc/2
+40
mV
Electrical Offset Voltage
(Magnetic error not included)
V
OE
I = 0A, Over Temperature
-50
Vcc/2
+50
mV
Magnetic Offset Error
V
OM
I = 0A, after excursion of 100A
+/- 0.3
+/- 0.8
A
I
P
, T = +25C
+/-
1
Total Accuracy
(Including all offsets)
X
Ip
I
P
, Over Temperature
+/-
13
%
PERFORMANCE CHARACTERISTICS, -40 C to +150 C, Vcc = 5V unless otherwise specified
Propagation time
t
PROP
I
P
=
50A (75A TBD)
4
Response time
t
RESPONSE
I
P
=
50A (75A TBD)
27
Rise time
t
r
I
P
=
50A (75A TBD)
26
s
Frequency Bandwidth
f
-3dB
13
kHz
I
P
, T = +25C
18.75 19.75 20.75 mV/A
Sensitivity Sens
I
P
, Over Temperature
16.5 23
mV/A
Noise V
NOISE
Peak to Peak; T = +25C
External Filter BW = 40kHz
7 mV
Non-linearity E
L
I
P
+/-
5
%
Symmetry E
S
I
P
97 100 103 %
I = 0A, T = +25C
-40
Vcc/2
+40
mV
Electrical Offset Voltage
(Magnetic error not included)
V
OE
I = 0A, Over Temperature
-60
Vcc/2
+60
mV
Magnetic Offset Error
V
OM
I = 0A, after excursion of 100A
+/- 0.3
+/- 0.8
A
I
P
, T = +25C
+/-
1
Total Accuracy
(Including all offsets)
X
Ip
I
P
, Over Temperature
+/-
15
%
Current Sensor: ACS750xCA-075
31Oct03, CMG, Rev 2.0
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 2003, Allegro MicroSystems, Inc.
Functional Block Diagram
Current Sensor: ACS750xCA-075
31Oct03, CMG, Rev 2.0
4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 2003, Allegro MicroSystems, Inc.
Vout vs Primary Current
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
0.5
1
1.5
2
2.5
3
3.5
4
4.5
-100
-75
-50
-25
0
25
50
75
100
Primary Current (A)
Vout (V)
-40C
-20C
25C
85C
150C
Linearity
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-50
-25
0
25
50
75
100
125
150
Temperature [C]
L
i
n
e
ar
i
t
y @
-7
5 A
m
p
s
[
%
]
Ip = -75A
Linearity
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-50
-25
0
25
50
75
100
125
150
Temperature [C]
L
i
n
e
a
r
i
t
y
@
+
75 A
m
p
s
[
%
]
Ip = +75A
Symmetr
Vcc =
5V
200 units / 2 CS lots / 1
IC l t
99.5
99.6
99.7
99.8
99.9
100
100.1
100.2
100.3
100.4
100.5
-50
-25
0
25
50
75
100
125
150
Temperature
[C]
Symmetr
y
[%]
Ip = 75A
Typical Performance Characteristics
Sensitivity
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
0
5
10
15
20
25
-100
-75
-50
-25
25
50
75
100
Primary Current (A)
S
e
ns
it
iv
it
y
[
m
V
/
A
]
-40C
-20C
25C
85C
150C
Supply Current
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
7.8
8
-50
-25
0
25
50
75
100
125
150
Temperature [C]
I
cc [mA]
Current Sensor: ACS750xCA-075
31Oct03, CMG, Rev 2.0
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 2003, Allegro MicroSystems, Inc.
Typical Performance Characteristics
(continued)
Magnetic Offset
Vcc = 5V
200 units / 2 CS lots / 1 IC lot
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-50
-25
0
25
50
75
100
125
150
Temperature [C]
Magnetic Offset [A]
I = 0 A, after excursion to 100 A
0 Amp Accuracy
Vcc = 5V
Without Offset
200 units / 2 CS lots / 1 IC lot
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-50
-25
0
25
50
75
100
125
150
Temperature [C]
0 Amp Accuracy [A]
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