ABLIC launches the S-5611A linear Hall effect IC for general use devices featuring the industry’s top class low noises

— Contributes to faster response and higher accuracy in core current sensor modules and to improved efficiency in general-purpose inverters —

ABLIC (President: Seiji Tanaka, Head Office: Minato-ku, Tokyo; hereinafter “ABLIC”), a group company of MinebeaMitsumi Inc., today launched the S-5611A linear Hall effect IC for general use devices.
The adoption of natural energy such as solar power generation and wind power generation has continued to grow from a perspective of utilization of renewable energy, and there is also an increased focus on improving the efficiency of these types of energy in order to further lessen their environmental impact. Current sensor equipped general-purpose inverters (*1) are widely used in solar power generation and other systems which utilize these natural energies, as well as in industrial machine tools and other systems. Increasing the response speed and accuracy of the equipped current sensors is an important element in the improvement of the efficiency of general-purpose inverters.
The S-5611A launched today is a programmable, high-accuracy linear Hall effect IC which achieves the industry's fastest class high speed response of 1.25μs(*2) as well as the industry's top class of low noise performance of 0.09μT/√Hz(*3) allowing for accurate measurement of even minute current fluctuations allowing it to contribute to improving inverter control performance.
The product is also equipped with a frequency band selection function(*4) which makes it possible to select 400kHz, 200kHz, or 100kHz with just this single IC. The noise generated by the IC can be reduced even further by selecting a lower frequency.
It also features a function(*5) which compensates for magnetic core characteristic changes caused by temperature, allowing for high core current sensor (*6) accuracy in a wide range of temperatures.
These characteristics contribute to reduced power consumption and lower CO2 emissions and make this an ideal IC for building current sensors to be equipped in environmentally friendly, highly energy efficient, high-accuracy inverters and DC-DC converters.

Major Features

Industry's fastest class high speed response (*2)
Reducing the detection delay time of the core current sensor is an effective means to further improve the energy conversion efficiency of general-purpose inverters. The S-5611A significantly contributes to improvement of energy conversion efficiency with the industry's faster class high speed response of 1.25μs.
Industry's smallest class low noise performance (*3)
Core current sensor accuracy is determined by output offset voltage and magnetic sensitivity setting accuracy, however under actual usage conditions output noise performance is also an important parameter which has an impact on current sensor accuracy. The S-5611A features the industry's smallest class low noise performance of 0.09μT/√Hz typ. which contributes to improved controllability and greater accuracy for inverters and other devices.
Greater noise reduction thanks to a frequency band selection function (*4)
There is a trade-off relationship between detection delay time and output noise performance in core current sensors. This performance is related to the linear Hall effect IC frequency band specifications, and therefore the output noise can be reduced by lowering the frequency band. The S-5611A can be programmed to use a frequency band of 400kHz, 200kHz, or 100kHz to suit usage applications.
High-accuracy in a wide range of temperatures thanks to a magnetic core temperature drift compensation function (*5)
In core current sensors, high-accuracy detection can be achieved independent of temperature by compensating for magnetic core characteristic changes caused by temperature. The S-5611A has a built-in function (*5) for compensating for changes in magnetic core characteristics. Compensation can be carried out by using a microcontroller to process calculation of current sensor output, however this function allows for easier achievement of high current sensor accuracy in a wide range of temperatures.

Major Specifications

・Output format
Analog voltage output proportional to magnetic flux density
・Non-ratiometric operation
Analog voltage output proportional to only applied magnetic flux density independent of power supply voltage
・Input magnetic flux density conversion noise voltage density
0.09μT/√Hz typ.
・Output noise voltage
1.89mVrms typ.　(At 400kHz output band, and magnetic sensitivity of 30V/T)
・Output response time
1.25μs typ. 2.5 μs max. (At 400kHz frequency band)
・Built-in nonvolatile memory
IC function switching and trimming adjustment can be carried out via 2 wire serial interface
・Function switching
Reference voltage operation mode：Reference voltage output mode (default setting), reference voltage input mode Reference voltage output 　　　：0.50 V, 1.50 V, 1.65 V, 2.50 V (default setting) Output signal polarity 　　　　　：Positive polarity (default setting), reverse polarity Frequency band 　　　　　　：100kHz, 200kHz, 400kHz (default setting) Thermal shutdown ：Enabled (default setting), disabled
・Trimming adjustment
Magnetic sensitivity　　　　　　：6～180 V/T (default setting 130 V/T typ.)、0.3 % step max. Magnetic sensitivity temperature drive setting range：-500～+500 ppm/℃(default setting 0 ppm/℃typ.), 25 ppm/℃ step typ. Output offset voltage　　　　　：1.5 mV step max. Reference voltage output　　　：4.0 mV step max.

(*1) general-purpose inverters : Circuits which freely control the voltage and frequency supply to industrial motors
(*2) the industry's fastest class high speed response : As a programmable linear Hall effect IC. At a frequency band of 400kHz. Based on our research as of November 2024
(*3) the industry's top class of low noise performance : As a programmable linear Hall effect IC. At a frequency of 10kHz. Based on our research as of November 2024
(*4) a frequency band selection function : A function which makes frequency band selection possible which can, for example, reduce noise by selecting a frequency of 100kHz
(*5) a function which compensates for magnetic core characteristic changes caused by temperature : A function which allows for configuration of the magnetic sensitivity temperature drift setting to a range between -500ppm/℃ to +500ppm/℃ in order to compensate for magnetic core temperature drift
(*6) core current sensor : A sensor which detects the magnitude of current by measuring the magnetic flux density generated in the magnetic core by current flowing to the conductor