MLX91221KDF-ABF-120-RE Melexis Current Sensor

Melexis produces the magnetic current sensor MLX91221KDF-ABF-120-RE. This sensor is intended for use in industrial and automotive settings where high speed and precision in measuring current are required. This sophisticated sensor improves design efficiency as well. However, it also contributes to raising the power supply system's overall safety and dependability. Let's examine the MLX91221KDF-ABF-120-RE and discover how the state-of-the-art current sensing technology is utilized by it.

MLX91221KDF-ABF-120-RE

What is MLX91221KDF-ABF-120-RE？

The Hall effect current sensor MLX91221KDF-ABF-120-RE is made by Melexis, a business renowned for its cutting-edge semiconductor products.

Part Number Breakdown:

MLX91221: Indicates the series and model of the sensor.

KDF-ABF: Refers to specific configurations or features of the sensor (e.g., pinout, temperature range).

120: Likely represents the measurement range or sensitivity.

RE: Typically indicates packaging type or tape and reel format for automated assembly.

Key Features of MLX91221KDF-ABF-120-RE

Hall-Effect Technology: The electric current is measured by the sensor using Hall effect technology. Hall effect sensors are generally used to measure electric current without making contact with the terrain by relating the glamorous field produced by a captain that's carrying current.

Contactless Current Sensing: Increases continuity, lessens wear and tear, and permits the sensor to cover current without making direct electrical contact.

Integrated Analog Output: An analog output proportionate to the measured current is produced by the sensor. This is helpful for integrating with microcontrollers or other signal processing systems' analog- to- digital converters(ADCs).

High Accuracy and Sensitivity: Because of its incredibly accurate design, the sensor can be used in situations where precise current dimension is necessary.

Small Form Factor (SOIC8 Package): Provided in a compact surface mount packaging, this makes integration into a design easier.

MLX91221KDF-ABF-120-RE Pin Diagram

The MLX91221KDF-ABF-120-RE typically comes in an SOIC-8 package, and its pin configuration is as follows:

1. VDD (Pin 1):

- Function: Supply voltage for the sensor.

- Typical Value: 4.5V to 5.5V.

2. GND (Pin 2):

- Function: Ground reference for the sensor.

3. OUT (Pin 3):

- Function: Analog output voltage, proportional to the measured magnetic field (current).

4. NC (Pin 4):

- Function: Not connected (often left floating or connected to ground).

5. VREF (Pin 5):

- Function: Reference voltage for the sensor output. This can be used for differential measurements.

6. ST (Pin 6):

- Function: Self-test input (can be connected to VDD or GND).

7. NC (Pin 7):

- Function: Not connected.

8. NC (Pin 8):

- Function: Not connected.

Functional Description

- VDD: Supplies the operating voltage to the IC.

- GND: Provides the ground reference for all other pins.

- OUT: Outputs an analog signal that varies with the magnetic field (current) being measured.

- VREF: Can be used as a reference for comparing the output voltage.

- ST: Engages the self-test feature of the sensor when connected to VDD or GND, depending on the specific function.

Functional Diagram

Ratiometric Mode

Specifications of MLX91221KDF-ABF-120-RE

Category	Sensors, Transducers Current Sensors
Category	Sensors, Transducers Current Sensors	Mfr	Melexis Technologies NV
Series	-
Packaging	Tape & Reel (TR)
Part Status	Active
For Measuring	AC/DC
Sensor Type	Hall Effect
Current - Sensing	20A
Number of Channels	1
Output	Fixed, Voltage
Sensitivity	62.5mV/A
Frequency	DC ~ 300kHz
Linearity	±0.6%
Accuracy	-
Voltage - Supply	3.135V ~ 3.465V
Response Time	2µs
Current - Supply (Max)	26mA
Operating Temperature	-40°C ~ 125°C
Polarization	Bidirectional
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
Supplier Device Package	16-SOIC
Base Product Number	MLX91221

Environmental & Export Classifications

Attribute	Description
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0060

Working Principle of MLX91221KDF-ABF-120-RE

The current measurement sensor MLX91221KDF-ABF-120-RE was created and is produced by Melexis, a business well-known for its uses in the automotive and automotive sector. This sensor makes use of the Hall phenomenon. This indicates that in order to measure electric current, the sensor must detect magnetic fields.

Working Principle:

1. Hall Effect Sensing:

- The MLX91221 detects glamorous fields produced by an electric current passing through a captain by using the Hall effect. A glamorous field is produced girding a captain when electric current overflows through it. The magnetic field's strength is closely correlated with the electric current.

- The sensor's internal Hall element senses the magnetic field. A voltage equal to the magnetic field's intensity is produced when a magnetic field interacts with a Hall element.

2. Magnetic Concentrator:

- There is a magnetic pickup on the sensor. In this way, the magnetic field is directed toward the Hall element. It raises the sensor's sensitivity and accuracy.

3. Signal Processing:

- The analog signal generated by the Hall element is processed by integrated electronics within the sensor. This processing typically involves amplifying the signal and converting it to a digital output if necessary.

- The sensor provides an analog output voltage that is proportional to the measured current, making it straightforward to interface with other electronics.

4. High Accuracy and Linearity:

- Over a broad current range, the MLX91221 is intended to deliver high accuracy and linearity. Moreover, it has temperature compensation. This indicates that performance is unaffected by a variety of temperature variations. It is therefore perfect for industrial and automotive settings.

5. Isolation:

- The fact that there is galvanic isolation between the measured current and the sensor electronics is one benefit of utilizing a Hall effect sensor like the MLX91221. In situations when galvanic isolation is crucial, this makes high current measurements safer.

Applications of MLX91221KDF-ABF-120-RE

Electric Vehicle (EV) Battery Management Systems (BMS)
Electric Power Steering (EPS)
Inverter/Converter Current Sensing
Onboard Chargers
DC-DC Converters
Motor Control Systems
Uninterruptible Power Supplies (UPS)
Industrial Automation
Welding Equipment
Renewable Energy Systems (e.g., Solar Inverters)
Smart Home Appliances
Power Tools
Battery-Powered Devices
UPS for Home Electronics
Energy Meters
Power Distribution Units (PDUs)
Electricity Substations
Medical Imaging Equipment
Portable Medical Devices
Smart Grid Monitoring
Battery Monitoring
Motor Control
Power Inverters

Advantages of MLX91221KDF-ABF-120-RE

The MLX91221KDF-ABF-120-RE is a highly accurate Hall-effect current sensor developed by Melexis. Here are some of its advantages:

High Accuracy
Wide Measurement Range
Integrated Overcurrent Detection
Low Noise
Small Form Factor
Wide Temperature Range
High Sensitivity
Ratiometric Output
Ease of Integration
Automotive-Grade Quality

What is the measuring range of the MLX91221KDF-ABF-120-RE?

Although the sensor is intended to monitor currents up to 120 A, its precise range may change based on usage and configuration.

What kind of output does the sensor provide?

The analog output of the MLX91221KDF-ABF-120-RE is proportionate to the current being measured. For additional examination, the output can be linked to a microcontroller or other processing device.

What is the operating temperature range?

The sensor is perfect for severe automotive settings because it functions over a wide temperature range, generally from-40°C to 125°C.

What is the supply voltage requirement?

A 5V supply voltage, which is common for many automobile electrical systems, is normally used by the sensor.

Is the sensor suitable for high-voltage applications?

Yes, the MLX91221KDF-ABF-120-RE provides isolation to stop high voltage surges and is built to function in high voltage situations.

How does the MLX91221KDF-ABF-120-RE achieve accuracy?

Despite the existence of an external magnetic field, the sensor provides great precision in current measurement by utilizing the Hall effect principle in conjunction with sophisticated signal processing algorithms.

What packaging does this sensor come in?

The MLX91221KDF-ABF-120-RE is available in a small, lead-free SOIC8 package, which is suitable for automated assembly processes in automotive manufacturing.