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Your cart is empty.Product Description
Pin:
- VBUS: Bus Voltage Input
- SDA/SCL: IIC Bus Data and Clock Signal Lines
- ALERT: Multi-Function Alarm Output
- A0/A1: IIC Address Line
- IN+/IN-: Non-Inverting Analog Input, Inverting Analog Input
INA226 IIC I2C Interface Bi-Directional Module
Specification:
- Common Mode Voltage: 36V (max)
- Input Offset: 10uV (max)
- Input Offset Drift:0.02uV/C (Typical)
- CMRR:126dB (min)
- Bandwidth:7KHz
- Supply Voltage:5.5V (max)
- Operating Temperature Range:-40~125 celsius
- Special Features:Alert Function;Bi-Directional;I2C;Low-SideCapable
Features:
- Single-Chip Solutions with I2C Interfaces Support Current, Voltage, and Power Supply Measurements, Simplifying Board Design and Addressing Layout Limitations Without An External Multiplexer or ADC
- Highest Accuracy In the Industry, With a Maximum Offset Voltage of 10 uV and a Maximum Gain Error of 0.1%, Not Only Achieving Higher Accuracy At Low Current, But Also Using Smaller Shunt Resistors to Reduce I*R Losses
- Independent Programmable Conversion Time and Sampling Averaging Techniques Simplify the Customization of Speed Requirements for Each System and Reduce the Need for Software and Memory
- The 420 uA Maximum Static Current and 2 uA Maximum Turn-Off Current Support Efficient Operation, Even Though the INA226 Integrates ADC and Power Multiplexer, the Power Consumption is 3.5% Lower Than Competing Discrete Solutions
- Error Analysis is Simplified by a 140 dB Common-Mode Rejection Ratio (CMRR) and 36 V Common-Mode Voltage (CMV) to Ensure Minimal or No Variation in the Offset Voltage Throughout
Rebecca
Reviewed in the United States on July 7, 2023
From the box without due diligence i assumed we could measure up to 30 amps but was rudely correct by physics. The device has a .1 ohm shunt resistor, this using the max current meatier voltage 82mv results in max amperage of 800mA. So to measure anything requiring power you need a smaller shunt resistor, which i did not have so i had to order a (2) .005 ohm resistor from mouser which costs literally how much i spent on this. On a side note the voltage measuring is spot on.TLDR if you want small current measurement straight up buy this, for measuring greater than 800ma you will need to change the shunt resistor.
Customer
Reviewed in the United States on June 28, 2023
The title for this product claims it is a "20A Current Sensor Module" but as configured it is NOT. In fact, with the R100 SMD resistor (0.1 ohm) that is installed on the board, it may not handle 1 amp without damaging the chip.Look at the datasheet for the INA226 (Google: ina226 datasheet) from Texas Instruments. In section 6.5 it lists the Shunt voltage input range as -81.9175 to 81.92mv. With the max voltage drop across the shunt resistor and the resistance known, we can calculate the maximum possible current in Amperes with Ohms law.V=I * R81.92mv equals 0.08192VR100 SMD resistor equals 0.1ohmsTo solve for I (current) we change the formula to read I = V / RI = 0.08192V / 0.1ohmsI = 0.8192 ampere (A)In order to successfully measure 20 amps of current, you need a 0.004 ohm resistor (R004). While I did not find any listings for the INA266 with an R004 resistor shown I found a few with an R002 resistor. That is a 0.002 ohm resistor and should therefore handle up to 40 amps although I'm unsure about the copper traces on the board. An external shunt resistor might be the better option.The INA226 IC alone will cost around $3 in small quantities and for only $6 ea you get this little board that makes it easy to build up for projects. I suggest either purchase one of the other INA226 boards with the R002 resistor (these are over $10 ea and aren't available via Prime) or get an external 20A 75mv shunt resistor for around $4 ea. For about $20 you can have 2 ina226 modules and 2 20A shunts. Just make sure to remove the installed R100 resistor.FYI: You can also measure higher currents with larger shunt resistors but I'll let you work that out ;)
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