INI282 전류 측정 센서
(CURRENT 7 CLICK)
개요
- 본 제품은 INI282 전류 측정 센서입니다.
- INA282 칩을 탑재하고 있으며 I2C 인터페이스를 가지고 있습니다.
- 높은 정확도를 가진 전류 측정 센서입니다.
특징
-
HOW DOES IT WORK?
Current 7 Click as its foundation uses the INA381, a high-accuracy current-sensing amplifier from Texas Instruments. This voltage output current-sensing amplifier accurately measures voltages developed across the current-sensing resistor (also known as a current-shunt resistor) at a common-mode range that extends 14V below the negative supply rail as up to 80V, allowing for either low-side or high-side current sensing. The zero-drift topology enables high-precision measurements with maximum input offset voltages as low as 70μV over the entire temperature range of –40°C to +120°C.
This Click board™ possesses two ways to communicate with the MCU. The analog output signal of the INA282 can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip using a 2-wire I2C compatible interface, or can be sent directly to an analog pin of the mikroBUS™ socket labeled as AN. The MCP3221 provides one single-ended input with low power consumption, a low maximum conversion current, and a Standby current of 250μA and 1μA, respectively. Data can be transferred at rates of up to 100kbit/s in the Standard and 400kbit/s in the Fast Mode. Selection can be performed by onboard SMD jumper labeled as OUT SEL, setting it to an appropriate position marked as AN and ADC.
The INA282 also allows a connection of external voltage signals on the onboard headers labeled as REF1 and REF2 for the device's reference voltage. This reference voltage determines how the output responds to certain input conditions. The configurable settings of the reference voltage control resistors, R5 and R6, allow the INA282 to be used in unidirectional and bi-directional applications. More information about these operational modes can be found in the attached datasheet.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the communication lines properly. Additionally, there is a possibility for the INA282 power supply selection via jumper labeled as PWR SEL to supply the INA282 from an external power supply terminal in the range from 2.7V to 18V or with mikroBUS™ power rails. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Measurements Applications Can be used for industrial control and automation applications, load and power supplies monitoring, telecom equipment, and many more On-board modules INA381 - current-sensing amplifier from Texas Instruments Key Features Wide input common-mode range, low power consumption, bidirectional and unidirectional current sensing, high accuracy and precision, possibility of signal processing in analog and digital form, and more Interface Analog,I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V,External