wcs 2 702 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 ? 98 m internal conductor resistance ? output voltage proportional to ac and dc current ? min. sensing current 0~ 2.0a at 5v voltage supply ? high sensitivity 1 mv/m 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 02 provi des 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 m anagement, over - current fault detection and any intelligent power management system etc? the wcs 2 7 02 consists of a precise, low - temperature drift linear hall sensor ic with temperature compensation circuit and a current path with 98 m typical internal co nductor 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 integrat ed 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 02 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 2 702 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 function block:
wcs 2 702 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 condit ions 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 =2 a 98 m
sensitivity vout i p= 2. 0 a 0. 85 1. 0 1.1 5 v/ a bandwidth bw 10 khz measurable current range m c r vdd=5v ( dc current ) 2.0 a vdd= 5 v ( ac rms ) 1.4 temperature drift vout ip =0 a 0.5 m v/ 1. all output - voltage measurements are made with a voltmeter having an input impeda nce of at least 100k 2. do not apply any load on output pin, it will degrade ic s performance. characteristic diagrams: WCS2702 vout v.s ip(+) y = 0.1018x + 2.3711 best linear equations r2 = 0.999 the goodness of fit of the trend line 2 2.5 3 3.5 4 4.5 5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 (a) v WCS2702 sensitivity standardization (30 ) v.s temperature 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1 0.822 0.881 0.925 0.959 0.982 0.995 1.001 1.000 0.991 0.974 0.953 0.929 0.901 0.868 0.834 0.792 0.752 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
wcs 2 702 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 WCS2702 vout v.s ip(-) y = -0.0983x + 2.5923 best linear equations r2 = 0.9996 the goodness of fit of the trend line 0 0.5 1 1.5 2 2.5 3 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 (a) v WCS2702 sensitivity v.s supply voltage 0 0.2 0.4 0.6 0.8 1 1.2 1.4 3 4 5 6 7 8 9 10 11 12 (v) (v/a) WCS2702 sensitivity v.s supply voltage 3v~5v 0 0.2 0.4 0.6 0.8 1 1.2 1.4 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5(v) (v/a)
wcs 2 702 winson reserves the right to make changes to improve reliability or manufacturability. ? winson, 2015/5/27 package information:
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