ACS712ELCTR-20A-T Allegro Microsystems Inc, ACS712ELCTR-20A-T Datasheet - Page 12

• Manufacturer Part Number: ACS712ELCTR-20A-T
• Description: IC, HALL EFFECT SENSOR, Linear, SOIC-8
• Manufacturer: Allegro Microsystems Inc
• Series: -r

Specifications of ACS712ELCTR-20A-T

• Msl: MSL 2 - 1 Year
• Termination Type: SMD
• No. Of Pins: 8
• Hall Effect Type: Linear
• Operating Temperature Range: -40°C To +85°C
• Supply Voltage Min: 4.5V
• Accuracy %: 1.5%
• Output Current: 10mA
• Featured Product: Allegro® ACS712 Current Sensor IC
• Current - Sensing: ±20A
• Accuracy: ±1.5%
• Sensitivity: 96 ~ 104 mV/A
• Current - Supply: 10mA
• Sensor Type: Hall Effect
• Voltage - Supply: 4.5 V ~ 5.5 V
• Output: 2.5V
• Frequency: 80kHz
• Response Time: 5µs
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Bandwidth: 80kHz
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ACS712
Application 2. Peak Detecting Circuit
Application 4. Rectified Output. 3.3 V scaling and rectification application
for A-to-D converters. Replaces current transformer solutions with simpler
ACS circuit. C1 is a function of the load resistance and filtering desired.
R1 can be omitted if the full range is desired.
I
P
C
0.1 μF
1
2
3
4
BYP
IP+
IP+
IP–
IP–
ACS712
I
P
+5 V
FILTER
VIOUT
C
0.1 μF
1
2
3
4
GND
VCC
BYP
IP+
IP+
IP–
IP–
ACS712
8
7
6
5
+5 V
FILTER
VIOUT
10 kΩ
R
GND
VCC
F
8
7
6
5
C
1 nF
1 MΩ
C
0.1 μF
R1
F
OUT
R
2 kΩ
33 kΩ
R2
F
V
V
OUT
C
1 nF
OUT
F
10 kΩ
R1
+
with
–
330 kΩ
R3
1N4448W
D1
U1
LT1178
2.1 kVRMS
C2
0.1 μF
10 kΩ
R4
C1
C1
0.1 μF
D1
1N914
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
A-to-D
Converter
Typical Applications
Q1
2N7002
V
V
PEAK
RESET
Isolation and a Low-Resistance Current Conductor
Application 5. 10 A Overcurrent Fault Latch. Fault threshold set by R1 and
R2. This circuit latches an overcurrent fault and holds it until the 5 V rail is
powered down.
Application 3. This configuration increases gain to 610 mV/A
(tested using the ACS712ELC-05A).
I
P
C
0.1 μF
1
2
3
4
BYP
IP+
IP+
IP–
IP–
I
ACS712
P
+5 V
FILTER
C
0.1 μF
VIOUT
1
2
3
4
BYP
VCC
GND
IP+
IP+
IP–
IP–
ACS712
+5 V
FILTER
8
7
6
5
VIOUT
VCC
GND
100 kΩ
R1
100 kΩ
R2
C
0.01 μF
8
7
6
5
F
R
1 kΩ
F
100 kΩ
R1
33 kΩ
R2
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
C
1 nF
OUT
F
1
3
+
–
5
4
2
3
3.3 kΩ
LM321
R3
+
–
4
5
2
D1
1N914
U1
LMV7235
1
V
C1
1000 pF
OUT
100 kΩ
R
PU
Fault
12