features and benefits

　　?industry-leading total output accuracy achieved with new piecewise linear digital temperature compensation of offset and sensitivity

　　?industry-leading noise performance through proprietary amplifier and filter design techniques

　　?120 khz typical bandwidth

　　?4.1 μs output rise time in response to step input current

　　?integrated shield greatly reduces capacitive coupling from current conductor to die due to high dv/dt signals, and prevents offset drift in high-side, high-voltage applications

　　?greatly improved total output error through digitally programmed and compensated gain and offset over the full operating temperature range

　　?small package size, with easy mounting capability

　　?monolithic hall ic for high reliability

　　?ultralow power loss: 100 μωinternal conductor resistance

　　?galvanic isolation allows use in economical, high-side current sensing in high-voltage systems

　　?4.5 to 5.5 v, single supply operation

　　?output voltage proportional to ac or dc currents

　　?factory-trimmed for accuracy

　　?extremely stable output offset voltage

　　deion

　　the allegro" acs770 family of current sensor ics provideseconomicalandprecisesolutions forac or dc currentsensing,typical applications include motor control, load detection andmanagement, power supply and dc-to-dc converter control.inverter control, and overcurrent fault detection.

　　the device consists of a precision, low-offset linear hallcircuit with a copper conduction path located near the die.applied current flowing through this copper conductionpath generates a magnetic field that is concentrated by a lowmagnetic hysteresis core, then converted by the hall ic into aproportional voltage.device accuracyis optimized through theclose proximity of the magnetic signal to the hall transducer.a precise,proportional output voltage is provided by thelow-offset, chopper-stabilized bicmos hall ic, which isprogrammed for accuracy at the factory. proprietary digitaltemperature compensation technology greatly improves theic accuracy and temperature stability without influencing thehigh-bandwidth operation of the analog output.

　　high-level immunity to current conductor dv/dt and strayelectric fields is offered byallegro proprietaryintegrated shieldtechnology for low output voltage ripple and low offset driftin high-side, high-voltage applications.

　　the output of the device has a positive slope (>vcc/2 forbidirectional devices)when an increasing current flowsthrough the primary copper conduction path (from terminal 4to terminal 5), which is the path used for current sampling. theinternal resistance of this conductive path is 100 u52 typical,providing low power loss.

　　? 李 进

　　? 深圳博瑞图电子科技有限公司

　　?mob :

　　?qq : 52519094

　　?add :深圳市福田区中航路都会轩3305

　　?email : lijin810230@163.com

　　?网 址：