wcs 2 70 5 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 hall effect base linear current sensor features: ? low noise analog signal path ? 8 .3 m internal conductor resistance ? output voltage proportional to ac and dc current ? min. sensing current 0~ 5 .0a at 5v voltage supply ? high sensitivity 2 55 mv/ a ? wide operating voltage range 3.0~12 v. ? low operating current 3ma ? nearly zero magnetic hysteresis . ? ratiometric output from supply voltage ? 10 k hz bandwidth functional description : the winson wcs 2 7 0 5 pro vides economical and precise solution for both dc and ac current sensing in industrial, commercial and communications systems. the unique package allows for easy implementation by the customer. typical applications include motor control, load detection and management, over - current fault detection and any intelligent power management system etc? the wcs 2 7 0 5 consists of a precise, low - temperature drift linear hall sensor ic with temperature compe nsation circuit and a current p a th with 8 .3 m typical internal conductor resistance. this extremely low resistance can effectively reduce power loss, operating temperature and increase the reliability greatly. applied current flowing through this conduction path generates a magnetic field which is sensed by the integ rated hall ic and converted into a proportional voltage. the terminals of the conductive path are electrically isolated from the sensor leads. this allow the wcs 2 7 0 5 current sensor to be used in applications requiring electrical isolation without the use of opto - isolators or other costly isolation techniques and make system more competitive in cost.
wcs 2 70 5 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 function block:
wcs 2 70 5 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 electrical characteristics: (t=+25 ? c, vdd=5.0v ) characteristic symbol test con ditions min typ max units supply voltage vcc 3.0 12 v supply current isupply ip =0 a 3.5 6.0 ma zero current vout v0g i p =0 a 2. 4 2.5 2. 6 v primary conductor resistance r p rimary i p = 5 a 8 .3 m
sensitivity vout i p= 5 a 2 17 2 55 2 93 m v/ a bandwidth bw 10 khz measurable current range m c r vdd=5v ( dc ) 7 . 5 a vdd= 5 v ( ac rms ) 5 temperature drift vout ip =0 a 0.5 m v/ 1.all output - voltage measurements are made with a voltmeter having an input impedance of a t least 100k 2. do not apply any load on output pin, it will degrade ic s performance. electrical diagram: WCS2705 sensitivity standardization(30 ) vs. temperature 0.500 0.600 0.700 0.800 0.900 1.000 1.100 1 0.864 0.913 0.956 0.983 0.998 1.007 1.007 1.000 0.985 0.967 0.946 0.919 0.893 0.859 0.825 0.782 0.740 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 WCS2705 vout v.s ip (+) y = 0.1388x + 2.3303 best linear equations r2 = 0.9987 the goodness of fit of the trend line 2 2.5 3 3.5 4 4.5 5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 (a) v
wcs 2 70 5 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 WCS2705 vout v.s ip (-) y = -0.1346x + 2.6266 best linear equations r2 = 0.9992 the goodness of fit of the trend line 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 (a) v WCS2705 sensitivity v.s supply voltage 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 3 4 5 6 7 8 9 10 11 12 (v) v/a WCS2705 sensitivity v.s supply voltage 0 0.05 0.1 0.15 0.2 0.25 0.3 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5(v) v/a WCS2705 sensitivity standardization v.s frequency 0 0.2 0.4 0.6 0.8 1 1.2 1 10 100 1000 10000 100000 hz
wcs 2 70 5 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 package information:
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