Data Sheet

High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
ACS709
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Isolation Characteristics
Characteristic Symbol Notes Rating Unit
Dielectric Strength Test Voltage* V
ISO
Agency type-tested for 60 seconds per
UL standard 1577
2100 VAC
Working Voltage for Basic Isolation V
WFSI
For basic (single) isolation per UL standard 1577;
for higher continuous voltage ratings, please contact
Allegro
277 VAC
* Allegro does not conduct 60-second testing. It is done only during the UL certification process.
Selection Guide
Part Number
I
P(LIN)
(A)
Sens (Typ)
(mV/A)
T
A
(°C)
Packing*
ACS709LLFTR-35BB-T 75 28 (V
CC
= 5 V)
–40 to 150 Tape and Reel, 2500 pieces per reel
ACS709LLFTR-20BB-T 37.5 56 (V
CC
= 5 V)
ACS709LLFTR-10BB-T 24 85 (V
CC
= 5 V)
ACS709LLFTR-6BB-T 15 90 (V
CC
= 3.3 V)
*Contact Allegro for packing options.
the open drain Overcurrent Fault pin will transition to a logic low
state. Factory programming of the linear Hall sensor IC inside of
the ACS709 results in exceptional accuracy in both analog and
digital output signals.
The internal resistance of the copper path used for current sensing is
typically1.1mΩ,forlowpowerloss.Also,thecurrentconduction
path is electrically isolated from the low voltage device inputs and
outputs. This allows the ACS709 family of sensor ICs to be used
in applications requiring electrical isolation, without the use of
opto-isolators or other costly isolation techniques.
Applications include:
• Motor control and protection
• Load management and overcurrent detection
• Power conversion and battery monitoring / UPS systems
Description (continued)
Absolute Maximum Ratings
Characteristic Symbol Notes Rating Units
Supply Voltage V
CC
8 V
Filter Pin V
FILTER
8 V
Analog Output Pin V
IOUT
32 V
Overcurrent Input Pin V
OC
8 V
Overcurrent
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
Pin
V
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
8 V
Fault Enable (FAULT_EN) Pin V
FAULTEN
8 V
Voltage Reference Output Pin V
ZCR
8 V
DC Reverse Voltage: Supply Voltage, Filter, Analog
Output, Overcurrent Input, Overcurrent Fault, Fault
Enable, and Voltage Reference Output Pins
V
Rdcx
–0.5 V
Output Current Source I
IOUT(Source)
3 mA
Output Current Sink I
IOUT(Sink)
1 mA
Operating Ambient Temperature T
A
Range L –40 to 150 °C
Junction Temperature T
J
(max) 165 °C
Storage Temperature T
stg
–65 to 170 °C