ACS712_V13 ALLEGRO [Allegro MicroSystems], ACS712_V13 Datasheet - Page 10

• Manufacturer Part Number: ACS712_V13
• Description: Fully Integrated, Hall Effect-Based Linear Current Sensor IC
• Manufacturer: ALLEGRO [Allegro MicroSystems]

ACS712
Definitions of Dynamic Response Characteristics
Power-On Time (t
ing voltage, the device requires a finite time to power its internal
components before responding to an input magnetic field.
Power-On Time, t
voltage to settle within ±10% of its steady state value under an
applied magnetic field, after the power supply has reached its
minimum specified operating voltage, V
chart at right.
Rise time (t
reaches 10% of its full scale value, and b) when it reaches 90%
of its full scale value. The rise time to a step response is used to
derive the bandwidth of the device, in which ƒ(–3 dB) = 0.35 / t
Both t
losses observed in the conductive IC ground plane.
r
and t
10000
1000
1200
1000
200
180
160
140
120
100
100
800
600
400
200
10
80
60
40
20
0
0
1
0.01
r
0
0
RESPONSE
). The time interval between a) when the device
Power on Time versus External Filter Capacitance
Rise Time versus External Filter Capacitance
PO
PO
Noise versus External Filter Capacitance
100
0.1
10
, is defined as the time it takes for the output
). When the supply is ramped to its operat-
are detrimentally affected by eddy current
}
Noise vs. Filter Cap
Expanded in chart at right
200
20
1
C
C
C
F
F
F
(nF)
(nF)
(nF)
with
300
30
10
I
P
= 5 A
CC
2.1 kVRMS
(min), as shown in the
100
40
400
I
P
= 0 A
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
1000
500
50
C
F
100
220
470
(nF)
10
22
47
0
1
4.7
Isolation and a Low-Resistance Current Conductor
r
.
1120.0
291.3
623.0
t
17.4
32.1
68.2
88.2
r
6.6
7.7
(μs)
400
350
300
250
200
150
100
50
0
0
I (%)
90
10
0
Rise Time versus External Filter Capacitance
25
50
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Step Response
Primary Current
T
Rise Time, t
A
C
Transducer Output
=25°C
75
F
(nF)
15 A
Excitation Signal
r
Output (mV)
100
125
t
150
10