FEATURES AND BENEFITS

Industry-leading noise performance

• User-programmable bandwidth (100 to 400 kHz) for easy

tradeoff between speed and noise

• Very fast response time (<1.25 μs typ.)

• Wide sensing range (0.8 to 18 mV/G)

• Factory-programmed sensitivity and offset over

temperature

• User-programmable sensitivity and offset

• User-programmable sensitivity over temperature for

ferromagnetic core drift compensation

• User-programmable overcurrent fault (OCF) pin

□ 1.5 μs (typ) OCF response time

• User-programmable, bidirectional reference pin (VREF)

for full control over offset levels

• Non-ratiometric output for immunity to noisy supplies

• Undervoltage and overvoltage detection

• High output drive current (15 mA)

• Low power mode for reduced ICC

• VCC pin survives exposure up to 15 V

• Monolithic Hall IC for high reliability

• Surface mount, small footprint, low-profile TSSOP8

package

DESCRIPTION

The Allegro ACS37600 is a linear sensor IC designed to be

used in conjunction with a ferromagnetic core to provide

a highly accurate current sensor suitable for industrial,

commercial, and communications applications.

The device consists of a precise, low-offset, chopper-stabilized

Hall-effect front end. Magnetic flux orthogonal to the IC package

surface is sensed by the integrated Hall and converted into a

proportional voltage. A very wide sensitivity range allows

current sensor module makers to use this IC for a <20 A or a

>1000 A module.

A selectable bandwidth from 100 kHz to >400 kHz makes the

device ideal for fast switching applications and applications

where low noise is required.

A user-programmable, bidirectional reference voltage pin

(VREF) enables constant monitoring of the zero-current

voltage and easy interfacing with 3.3 V and 5 V ADCs.

The device includes a user-programmable overcurrent fault

pin with a 1.5 μs (typ) response time for fast short-circuit

protection.

The sensitivity and offset drift over temperature are factory

programmed at Allegro to provide a highly accurate solution across

the full temperature range.

The ACS37600 is customer programmable. The absolute value

of sensitivity and offset can be programmed after manufacturing.

Additionally, customers can program the sensitivity over temperature

to compensate for ferromagnetic core drifts, enabling industryleading current sensor accuracy.

A non-ratiometric output immune to supply noise, the ability to

survive up to 15 V on the supply pin, and a stellar ESD performance

make the ACS37600 ideal for applications where reliability and

robustness are required.

The IC is offered in a low-profile 8-pin surface mount TSSOP

package (thin-shrink small outline package, suffix LU) that is lead

(Pb) free, with 100% matte tin leadframe plating.

TYPICAL APPLICATIONS

• Current sensing modules

• Solar (MPPT, combiner box)

• Motor control

• Uninterruptable power supplies (UPS)

• Smart fuse

• Overcurrent detection

• Power supplies