High Bandwidth, Fast Fault Response Current Sensor IC

In Thermally Enhanced Package

ACS709

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Selection Guide

Part Number

(A)

Sens

(mV/A)

(°C)

Packing*

ACS709LLFTR-35BB-T

75

28

–40 to 150

Tape and Reel, 2500 pieces per reel

ACS709LLFTR-20BB-T

37.5

56

*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

8V

Filter Pin

8V

Analog Output Pin

32

V

Overcurrent Input Pin

8V

Overcurrent ¯F¯¯A¯U¯¯L¯¯T¯ Pin

8V

Fault Enable (FAULT_EN) Pin

8V

Voltage Reference Output Pin

8V

DC Reverse Voltage: Supply Voltage, Filter, Analog

Output, Overcurrent Input, Overcurrent Fault, Fault

Enable, and Voltage Reference Output Pins

–0.5

V

Isolation Voltage

2100

VAC

Output Current Source

3mA

Output Current Sink

1mA

Operating Ambient Temperature

Range L

–40 to 150

°C

Junction Temperature

165

°C

Storage Temperature

–65 to 170

°C