company blog about Allegro ACS733KLATR-20AB 1MHz Bandwidth Galvanically Isolated Current Sensor

Allegro ACS733KLATR-20AB 1MHz Bandwidth Galvanically Isolated Current Sensor

Shenzhen Mingjiada Electronics Co., Ltd., a globally renowned authorized independent distributor of electronic components, stocks Allegro's ACS733KLATR-20AB high-performance current sensor. Featuring a 1MHz high bandwidth and electrical isolation, this sensor meets the demanding requirements for AC or DC current detection in automotive, industrial, commercial, and communication systems.

【ACS733KLATR-20AB Product Description】

The ACS733KLATR-20AB is a Hall-effect-based differential current sensor utilizing advanced SOIC-16 packaging technology. Operating within a voltage range of 3.14V to 3.46V, it measures AC or DC currents up to 20A.

Featuring a sensitivity of 66mV/A and ±4.5% accuracy, the ACS733KLATR-20AB provides a ratio-metric voltage output that interfaces directly with microcontrollers or ADCs. Its response time of just 200ns makes it ideal for high-frequency switching applications.

The ACS733KLATR-20AB is well-suited to replace high-frequency transformers and current transformers in applications operating at high voltages. It is applicable across all markets, including automotive, industrial, commercial, and communications systems.

【Detailed Performance Parameters of ACS733KLATR-20AB】

The ACS733KLATR-20AB features a sensitivity of 66mV/A, capable of detecting AC or DC currents up to ±20A, delivering high-accuracy measurements of ±4.5% across the entire operating temperature range.

The ACS733KLATR-20AB sensor exhibits a typical noise density of 80μA/√Hz. Across its 1MHz bandwidth, this corresponds to a total input reference noise equivalent to 100mA RMS, delivering effective 100mA resolution.

The ACS733KLATR-20AB supports 3.3V single-supply operation (3.14V to 3.46V supply range) with a maximum supply current of 35mA. Its operating temperature range of -40°C to 125°C makes it suitable for harsh environments in automotive and industrial applications.

The output voltage is proportional to both AC and DC currents, employing a ratio-metric output with near-zero hysteresis. Factory-calibrated sensitivity and static output voltage further enhance accuracy.

【ACS733KLATR-20AB Technical Advantages】

Compared to traditional current transformers, the ACS733KLATR-20AB offers significant technical advantages. Its 1MHz high bandwidth enables accurate capture of current transients, critical for monitoring and controlling modern high-frequency switching power supply systems.

The ACS733KLATR-20AB sensor employs differential Hall sensing technology, effectively suppressing external common-mode magnetic field interference to deliver more precise measurements. Its internal primary conductor resistance is below 1mΩ, resulting in minimal power loss and enhancing overall system efficiency.

The ACS733KLATR-20AB provides 3600VRMS electrical isolation, suitable for voltage rails up to 616V AC RMS or 870Vpk or VDC, delivering a safe and reliable solution for high-voltage applications.

The ACS733KLATR-20AB measures input current through two Hall-effect plates, detecting magnetic fields with opposite polarity to effectively suppress external common-mode magnetic field interference. Its common-mode field rejection capability is approximately -40 dB.

The ACS733KLATR-20AB also integrates a user-configurable overcurrent fault detection feature. This open-drain NMOS output enables faster reporting of overcurrent or short-circuit events with a response time <600 ns.

【ACS733KLATR-20AB Applications】

In automotive electronics, the ACS733KLATR-20AB is suitable for battery management systems, motor control systems, and charging systems. Its AEC-Q100 qualification ensures reliability in automotive environments.

In industrial applications, the ACS733KLATR-20AB is suitable for power supplies, DC/DC converters, and current monitoring/control in various industrial equipment.

In communication infrastructure, the ACS733KLATR-20AB can be used for current monitoring in server power supplies, base station power supplies, and network equipment.