توضیحات
تراشه ACS712TELC-05Bساخت شرکت Allegro براي اندازه گيري جريان هاي AC/DC ساخته شده است .
سنسور هاي جريان ACS712 براي استفاده آسان با ميکروکنترلر ها مانند آردوينو طراحي شده اند.اين سنسور ها بر پايه ي چيپ قديمي ACS712ELC هستند. همچنين سنسور ACS712 با مقادير مقياس کامل مختلفي مانند 5 آمپر ، 20 آمپر و 30 آمپر در بازار موجود مي‌باشند که پايه و اساس طرز کار هر يک از اين سنسور‌ها يکسان است. تنها تفاوت موجود ؛ ضريب مقياسي است که در خروجي تحويل مي‌دهد.
عمل کرد سنسور ACS712 بر اساس اثر هال مي‌‌باشد. ولتاژ خروجي آن به صورت خطي متناسب با جريان تغيير مي‌کند.حداکثر فرکانس عملياتي 80KHZ مي باشد و زمان تغيير خروجي آن 5 ميکرو ثانيه مي باشد. خطا حداکثر 1.5% در دماي 25 درجه مي باشد .
Description
Fully Integrated, Hall-Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
Description
The Allegro™ ACS712 provides economical and precise
solutions for AC or DC current sensing in industrial, commercial,
and communications systems. The device package allows for
easy implementation by the customer. Typical applications
include motor control, load detection and management, switchmode power supplies, and overcurrent fault protection. The
device is not intended for automotive applications.
The device consists of a precise, low-offset, linear Hall circuit
with a copper conduction path located near the surface of the
die. Applied current flowing through this copper conduction
path generates a magnetic field which the Hall IC converts into a
proportional voltage. Device accuracy is optimized through the
close proximity of the magnetic signal to the Hall transducer.
A precise, proportional voltage is provided by the low-offset,
chopper-stabilized BiCMOS Hall IC, which is programmed
for accuracy after packaging.
Features and Benefits
Low-noise analog signal path
Device bandwidth is set via the new FILTER pin
5 µs output rise time in response to step input current
80 kHz bandwidth
Total output error 1.5% at TA= 25°C
Small footprint, low-profile SOIC8 package
1.2 m ohm internal conductor resistance
? 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8
5.0 V, single supply operation
66 to 185 mV/A output sensitivity
Output voltage proportional to AC or DC currents
Factory-trimmed for accuracy
Extremely stable output offset voltage
Nearly zero magnetic hysteresis
Ratiometric output from supply voltage
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