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参数资料
| 型号： | ASEK712ELC-20A-T-DK |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ASEK712ELC-20A |
| 设计资源： | ACS7xx Demo Brd BOM/Schematics |
| 标准包装： | 1 |
| 传感器类型： | 电流传感器 |
| 传感范围： | -20 A ~ 20 A |
| 灵敏度： | 100mV/A |
| 电源电压： | 4.5 V ~ 5.5 V |
| 嵌入式： | 否 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ASEK712ELC-20A |
| 其它名称： | 620-1429 |
ACS712
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
Definitions of Dynamic Response Characteristics
Power-On Time (t PO ). When the supply is ramped to its operat-
ing voltage, the device requires a finite time to power its internal
components before responding to an input magnetic field.
Power-On Time, t PO , is defined as the time it takes for the output
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 CC (min), as shown in the
chart at right.
Rise time (t r ). The time interval between a) when the device
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
I (%)
90
Primary Current
derive the bandwidth of the device, in which ?(–3 dB) = 0.35 / t r .
Both t r and t RESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
10
0
Transducer Output
Rise Time, t r
t
200
180
160
140
120
100
80
60
40
20
0
0
Power on Time versus External Filter Capacitance
I P = 5 A
I P = 0 A
10 20 30 40
C F (nF)
50
Step Response
T A =25°C
Output (mV)
Noise vs. Filter Cap
10000
1000
100
10
1
Noise versus External Filter Capacitance
15 A
Excitation Signal
0.01
0.1
1
C F (nF)
10
100
1000
1200
1000
800
600
400
200
0
Rise Time versus External Filter Capacitance
Expanded in chart at right
C F (nF)
Open
1
4.7
22
47
100
220
470
t r ( μ s)
3.5
5.8
17.5
73.5
88.2
291.3
623
1120
180
160
140
120
100
80
60
40
20
0
Rise Time versus External Filter Capacitance
0.1
1
10
100
1000
0.1
1
10
100
C F (nF)
C F (nF)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
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