Data Sheet

High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
ACS709
9
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ACS709 Bandwidth versus External Capacitor Value, C
F
Capacitor connected between FILTER pin and GND
1000
100
10
1
0.1
0.01 0.1 1 10 100 1000
Bandwidth (kHz)
Capacitance (nF)
Characteristic Performance
ACS709x-35B
V
CC
= 5 V
ACS709x-35B
V
CC
= 3.3 V
ACS709x-20B
V
CC
= 5 V
ACS709x-20B
V
CC
= 3.3 V
Capacitance (nF)
Capacitance (nF)
Capacitance (nF)
Capacitance (nF)
RMS Noise (µV)
RMS Noise (µV)
RMS Noise (µV)
RMS Noise (µV)
400
500
600
700
800
900
1000
0 10 20 30 40 50
300
400
500
600
700
800
900
0 10 20 30 40 50
0
200
400
600
800
1000
1200
1400
1600
0 10 20 30 40 50
0
200
400
600
800
1000
1200
1400
1600
0 10 20 30 40 50
ACS709 Noise versus External Capacitor Value, C
F
Capacitor connected between FILTER pin and GND