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ACS710

120 kHz Bandwidth, High-Voltage Isolation Current Sensor with Integrated Overcurrent Detection

Allegro MicroSystems 

ACS710

120 kHz Bandwidth, High-Voltage Isolation

Current Sensor with Integrated Overcurrent Detection

Features and Benefits

▪ Industry-leading noise performance with greatly improved

bandwidth through proprietary amplifier and filter design

techniques

▪ Small footprint package suitable for space-constrained

applications

▪ 1 mΩ primary conductor resistance for low power loss

▪ High isolation voltage, suitable for line-powered

applications

▪ User-adjustable Overcurrent Fault level

▪ Overcurrent Fault signal typically responds to an

overcurrent condition in < 2 μs

▪ Integrated shield virtually eliminates capacitive coupling

from current conductor to die due to high dV/dt voltage

transients

▪ Filter pin capacitor improves resolution in low bandwidth

applications

▪ 3 to 5.5 V single supply operation

▪ Factory-trimmed sensitivity and quiescent output voltage

▪ Chopper stabilization results in extremely stable quiescent

output voltage

▪ Ratiometric output from supply voltage

CB Certificate Number:

US-23711-UL

Package: 16-Pin SOIC Hall-Effect IC

Package (suffix LA)

Not to scale

Description

TheAllegro™ACS710 current sensor provides economical and

precise means for current sensing applications in industrial,

commercial, and communications systems. The device is offered

in a small footprint surface-mount package that allows easy

implementation in customer applications.

TheACS710 consists of a precision linear Hall sensor integrated

circuit with a copper conduction path located near the surface

of the silicon die. Applied current flows through the copper

conduction path, and the analog output voltage from the Hall

sensor linearly tracks the magnetic field generated by the

applied current. The accuracy of the ACS710 is maximized

with this patented packaging configuration because the Hall

element is situated in extremely close proximity to the current

to be measured.

High-level immunity to current conductor dV/dt and stray

electric fields, offered by Allegro proprietary integrated shield

technology, results in low ripple on the output and low offset

drift in high-side, high-voltage applications.

The voltage on the Overcurrent Input (VOC pin) allows

customers to define an overcurrent fault threshold for the device.

When the current flowing through the copper conduction path

(between the IP+ and IP– pins) exceeds this threshold, the open

drain Overcurrent Fault pin will transition to a logic low state.

Factory programming of the linear Hall sensor inside of the

ACS710 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 mΩ, for low power loss. Also, the current

conduction path is electrically isolated from the low-voltage

Continued on the next page…

Typical Application Circuit

VCC

1 IP+

16 Fault_EN

RH

FAULT_EN

2

3

IP+

IP+

15

ACS710 VOC 14

VCC

RL

RH, RL Sets resistor divider reference for VOC

CF Noise and bandwidth limiting filter capacitor

4

IP

IP+

5

IP–

13

FAULT

12

VIOUT

COC

RPU

B

0.1 µF

COC Fault delay setting capacitor, 22 nF maximum

A Use of capacitor required

6 IP–

11 VIOUT

FILTER

Use of resistor optional, 330 kΩ recommended.

7 IP–

8 IP–

10

VZCR

CF

9

GND

1 nF

A

B If used, resistor must be connected between

¯F¯ ¯A ¯U¯¯L¯ ¯T¯  pin and VCC.

ACS710-DS, Rev. 13

MCO-0000196

November 13, 2017

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