ACS709数据手册传感器变送器的电流传感器规格书PDF

描述 Description

The Allegro ACS709 current sensor IC provides economical and precise means for current sensing applications in industrial, automotive, commercial, and communications systems. The device is offered in a small footprint surface mount package that allows easy implementation in customer applications.
The ACS709 consists of a precision linear Hall sensor integrated circuit with a copper conduction path located near the surface of the silicon die. Applied current flows through the copper conduction path, and the analog output voltage from the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS709 is maximized with this patented packaging configuration because the Hall element is situated in extremely close proximity to the current to be measured.
High level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology, guarantees low output ripple and low offset drift in high-side applications.
The voltage on the Overcurrent Input (VOC pin) allows customers to define an overcurrent fault threshold for the device. When the current flowing through the copper conduction path (between the IP+ and IP– pins) exceeds this threshold, the open drain Overcurrent Fault pin will transition to a logic low state. Factory programming of the linear Hall sensor IC inside of the ACS709 results in exceptional accuracy in both analog and digital output signals.
The internal resistance of the copper path used for current sensing is typically 1.1 mΩ, for low power loss. Also, the current conduction path is electrically isolated from the low voltage device inputs and outputs. This allows the ACS709 family of sensor ICs to be used in applications requiring electrical isolation, without the use of opto-isolators or other costly isolation techniques.
ACS709-10 UL Certificate of Compliance (PDF)
These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available.  Date of status change: June 5, 2017 Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales.

特性 Features

•Industry-leading noise performance with 120 kHz bandwidth through proprietary amplifier and filter design techniques
•Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt, and prevents offset drift in high-side applications
•Small footprint surface mount QSOP24 package
•2100 VRMS isolation voltage between primary current path and sensor IC electronics
•1.1 mΩ primary conductor resistance for low power loss
•User-settable Overcurrent Fault level
•Overcurrent Fault signal typically responds to an overcurrent condition in <2 µs
•Filter pin capacitor sets analog signal bandwidth
•±2% typical output error
•3 to 5.5 V, single supply operation
•Factory trimmed sensitivity, quiescent output voltage, and associated temperature coefficients
•Chopper stabilization results in extremely stable quiescent output voltage
•Ratiometric output from supply voltage

简介

ACS709属于传感器变送器的电流传感器。由制造生产的ACS709电流传感器电流传感器用于检测并响应电线或电路中的电流变化。传感器类型包括电流开关式、磁通门式、霍尔效应式、电流指示器、电流传感器、磁调制器、磁阻式和变压器式（带调节功能），电流检测范围可编程设置在 5mA 至 2500A 之间，可用于测量交流或直流电流。