ASEK712ELC-30A-T-DK

Fully Integrated, Hall Effect-Based Linear Current Sensor IC 

with 

2.1 kVRMS 

Isolation and a Low-Resistance Current Conductor

ACS712

11

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Chopper Stabilization is an innovative circuit technique that is 
used to minimize the offset voltage of a Hall element and an asso-
ciated on-chip amplifier.  Allegro patented a Chopper Stabiliza-
tion technique that nearly eliminates Hall IC output drift induced 
by temperature or package stress effects. This offset reduction 
technique is based on a signal modulation-demodulation process. 
Modulation is used to separate the undesired DC offset signal 
from the magnetically induced signal in the frequency domain.  
Then, using a low-pass filter, the modulated DC offset is sup-
pressed while the magnetically induced signal passes through 

the filter.  As a result of this chopper stabilization approach, the 
output voltage from the Hall IC is desensitized to the effects 
of temperature and mechanical stress. This technique produces 
devices that have an extremely stable Electrical Offset Voltage, 
are immune to thermal stress, and have precise recoverability 
after temperature cycling.  

This technique is made possible through the use of a BiCMOS 
process that allows the use of low-offset and low-noise amplifiers 
in combination with high-density logic integration and sample 
and hold circuits.  

Chopper Stabilization Technique

Amp

Regulator

Clock/Logic

Hall Element

Sa

mp

le

 an

d

Ho

ld

Low-Pass
Filter

Concept of Chopper Stabilization Technique

ASEK712ELC-30A-T-DK Information:
Part No.
ASEK712ELC-30A-T-DK

RFQ

Description
BOARD EVAL FOR ASEK712ELC-30A
File Size
658620 bytes
Page Size
612 x 792 pts (letter)
All Pages
15
Manufacturer
Allegro MicroSystems, LLC.
Homepage
http://www.allegromicro.com/
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