ACS710: 120 kHz Bandwidth, High Voltage Isolation Current Sensor IC with Integrated Overcurrent Detection
The Allegro?ACS710 current sensor provides economical and precise means for current sensing applications in industrial, commercial, and communications systems. The device is offered in a all footprint surface mount package that allows easy implementation in customer applications.
The ACS710 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 og output voltage from the Hall sensor linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS710 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 ripple at output and low offset drift in high-side, high voltage applications.
The voltage on the Overcurrent Input (VOC pin) allows pin will transition to a logic low state. Factory programming of the linear Hall sensor inside of the ACS710 results in exceptional accuracy in both og and dial output signals.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
The internal resistance of the copper path used for current sensing is tically 1 mΩ, for low power loss. Also, the current conduction path is electrically isolated from the low voltage sensor inputs and outputs. This allows the ACS710 family of sensors to be used in applications requiring electrical isolation, without the use of opto-isolators or other costly isolation techniques.
The ACS710 is provided in a all, surface mount SOIC16 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board embly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory
- 通過放大器和濾波器設(shè)計(jì)工藝實(shí)現(xiàn)高帶寬行業(yè)的噪音性能
- 體積小，適用于有空間限制的應(yīng)用。
- 1 mΩ 初級導(dǎo)體電阻產(chǎn)生的功率損耗小
- 高緣電壓適合在火線應(yīng)用
- 可供用戶調(diào)整的過流故障標(biāo)準(zhǔn)
- 過流故障信號通常反映 <2 μ中的過流狀況
- 由于 dV/dt 的高瞬變電壓，集成屏幕事實(shí)上能消除電流導(dǎo)體中的電容耦合。
- 濾波管腳電容器能低帶寬應(yīng)用中的分辨率。
- 3 至 5.5 V, 單電源工作
- 廠家設(shè)定的靈敏度和靜態(tài)輸出電壓
- 穩(wěn)定斬波帶來十分穩(wěn)定的靜態(tài)輸出電壓
- 電源電壓的成比例輸出
- 電動機(jī)控制與保護(hù)
- 負(fù)載管理與過流檢測
- 功率變換與電池監(jiān)控 /UPS 系統(tǒng)
ACS710: 帶寬 120 kHz，高壓緣電流傳感器 IC，具有集成過流檢測功能
Allegro? ACS710 電流傳感器 IC 為工業(yè)、商業(yè)和通信系統(tǒng)中的電流傳感應(yīng)用提供經(jīng)濟(jì)實(shí)惠的解決方案。此設(shè)備配有小尺寸壁掛式包裝，便于用戶使用。
ACS710 設(shè)備有一個(gè)的線性霍爾傳感器集成電路，且其銅制的電流路徑靠近晶片的表面。外加電流流經(jīng)銅制電流路徑，而霍爾傳感器 IC 的模擬輸出電壓則對外加電流產(chǎn)生的磁場進(jìn)行線性跟蹤。ACS710 的性由于這一包裝設(shè)備實(shí)現(xiàn)了化，因?yàn)榛魻栐奈恢门c需要測量的電流十分接近。
Allegro 的集成屏幕技術(shù)提供的對電流導(dǎo)體 dV/dt 信號和雜散電場的高擾能力，高端、高電壓應(yīng)用中的低輸出電壓紋波和低偏置漂移。
過流電壓輸入(VOC 管腳)讓用戶能為此設(shè)備設(shè)定過流故障標(biāo)準(zhǔn)。當(dāng)流經(jīng)銅制電流路徑 (介于 IP+ 和 IP– 管腳之間)的電流過了這一標(biāo)準(zhǔn)，斷開的漏過流故障管腳會轉(zhuǎn)為邏輯低狀態(tài)。ACS710 內(nèi)部線性霍爾傳感器 IC 的寫入只讀程序使得模擬和數(shù)字輸出信號都異常精準(zhǔn)。
用于電應(yīng)的典型銅制路徑內(nèi)電阻是 1 mΩ，功率耗損很小。而且，電流路徑與低壓傳感器的輸入和輸出均為緣。這樣，ACS710 傳感器系列可用于那些要求電氣緣卻未使用光電緣器或其它昂貴緣技術(shù)的應(yīng)用。
