ATT7021B

ATT7021B User Manual（210-SD-123） ATT7021B User Manual 2009-5 V1.0 －ATT7021B update ATT7021 －ATT7021 User Manual http://www.hitrendtech.com （） Page1 of 14 Rev1.0 ATT7021B User Manual ATT7021 User’s Manual ATT7021B User Manual（210-SD-123） Directory 3 8 http://www.hitrendtech.com （） Page2 of 14 Rev1.0 ATT7021B User Manual（210-SD-123） ATT7021B User Manual --------update ATT7021 ATT7021B is update version of ATT7021, it use .35um produce technique achieved lower power consumption and more stabile capability. ATT7021B is pin to pin full compatible with ATT7021 and ADE7755. Compare with ATT7021, mainly reinforced points are following: 1，Lower power consumption. Power consumption of ATT7021B typical value is 3.3mA. 2， Better coherence of VREF, include central value and temperature coefficient. TC TYP: 25ppm, max 50ppm. 3，Full scale nearly same with ADE7755. IC output frequency is in inverse proportion to full scale square (input same signal). ADC full scale will make an impact for the central value of the resistance fractional network (R1) of voltage channel. ADC full scale has relation with ADC conversion factor and VREF, etc. Full scale is in direct proportion to VREF for one IC. For VREF has +, - 4% bias, R1 value adjust range requires upper +, - 8%. http://www.hitrendtech.com （） Page3 of 14 Rev1.0 ATT7021B User Manual（210-SD-123） Average full scale: Average full scale（mV） ATT7021B 860 ATT7021 810 ADE7755 880 When hardware calibration: z To replace ATT7021 by AT...