ASEK712ELC-30A-T-DK

Fully Integrated, Hall Effect-Based Linear Current Sensor IC 

with 

2.1 kVRMS 

Isolation and a Low-Resistance Current Conductor

ACS712

10

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Power on Time versus External Filter Capacitance

0

20

40

60

80

100

120

140

160

180

200

0

10

20

30

40

50

C

F

 (nF)

C

F

 (nF)

t

PO

 (

μ

s)

I

P

 = 5 A

I

P

 = 0 A

Noise versus External Filter Capacitance

1

1000

10

100

10000

0.01

0.1

1

10

100

1000

Noise

(p-p)

 (m

A

)

Noise vs. Filter Cap

Rise Time versus External Filter Capacitance

1200

1000

800

600

400

200

0

0.1

1

10

100

1000

t

r

s)

C

F

 (nF)

Rise Time versus External Filter Capacitance

180
160
140
120
100

80
60
40
20

0

0.1

1

10

100

t

r

s)

C

F

 (nF)

Expanded in chart at right

}

Definitions of Dynamic Response Characteristics

Primary Current

Transducer Output

90

10

0

I (%)

Rise Time, t

r

t

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 
derive the bandwidth of the device, in which ƒ(–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.

Excitation Signal

Output (mV)

15 A 

Step Response

T

A

=25°C

C

F

 (nF)

t

r

 (μs)

 Open

 

3.5

 1

 5.8

 4.7  

17.5

 22

 73.5

 47

 88.2

100

291.3

 220

 623

 470

 

1120

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.

ASEK712ELC-30A-T-DK Information:
Part No.
ASEK712ELC-30A-T-DK

RFQ

Description
BOARD EVAL FOR ASEK712ELC-30A
File Size
658620 bytes
Page Size
612 x 792 pts (letter)
All Pages
15
Manufacturer
Allegro MicroSystems, LLC.
Homepage
http://www.allegromicro.com/
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