INA219 雙向電流／電源監控感測器模組 電壓 0-26V 最大電流 ±3.2A

描述

INA219 雙向電流電源監控感測器模組 電壓 0-26V 最大電流 ±3.2A

INA219 雙向電流電源監控感測器模組 將解決您所有的電源監控問題。無需在兩個萬用表上苦苦掙扎，您可以在此突破中使用方便的 INA219B 芯片，以 1% 的精度測量 I2C 上的高壓側電壓和直流電流。

大多數電流測量設備，例如我們的電流面板表，僅適用於低側測量。這意味著除非您想使用電池，否則您必須將測量電阻放在目標接地和真實接地之間。這可能會導致電路出現問題，因為當接地參考改變並隨著電流消耗的變化而移動時，電子設備往往不喜歡它。該芯片更加智能 – 它可以處理高達 +26VDC 的高壓側電流測量，即使它由 3 或 5V 供電。它還將報告高側電壓，這對於跟踪電池壽命或太陽能電池板非常有用。

精密放大器測量 0.1 歐姆、1% 檢測電阻器兩端的電壓。由於放大器的最大輸入差為 ±320mV，這意味著它可以測量高達 ±3.2 安培。使用內部 12 位 ADC，±3.2A 範圍內的分辨率為 0.8mA。內部增益設置為最小div8，最大電流為±400mA，分辨率為0.1mA。高級黑客可以移除 0.1 ohm 電流檢測電阻器並用自己的電阻器替換它以更改範圍（比如 0.01 ohm 以測量 32 Amps 和 8mA 的分辨率）

我們包括一個 6 針接頭（因此您可以輕鬆地連接它傳感器到麵包板）以及 3.5 毫米端子插頭，因此您可以輕鬆連接和卸下負載。

用法很簡單。用 3 到 5VDC 為傳感器本身供電，並將兩個 I2C 引腳連接到您的微控制器。然後將目標電源連接到 VIN+，將負載接地到 VIN-。我們有一個詳細的教程，可以為您完成所有增益、範圍和數學運算——只需使用 Arduino 或 CircuitPython 即插即用！

採用單電源供電，其工作電壓介於 +3.0 至 +5.5V 之間。
．監測電壓範圍：0～26V 最大誤差精度：1% (-40～85℃)
．最大偏移電壓：100uV
．12位解析度
．使用I2C介面
．以安培為單位讀取電流，並以瓦特為單位讀取電源對多達128個採樣

• 0.1 ohm 1% 2W 電流檢測電阻
• 高達 +26V 目標電壓
• 高達 ±3.2A 的電流測量，具有 ±0.8mA 的分辨率
• 注意： 產品隨附的接線端子可能是藍色或黑色的。
• 感測器模組使用 I2C 7 位地址 0x40、0x41、0x44、0x45，可通過跳線選擇

INA219 High Side DC Current Sensor Breakout – 26V ±3.2A Max

This breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can just use the handy INA219B chip on this breakout to both measure both the high side voltage and DC current draw over I2C with 1% precision.

Most current-measuring devices such as our current panel meter are only good for low side measuring. That means that unless you want to get a battery involved, you have to stick the measurement resistor between the target ground and true ground. This can cause problems with circuits since electronics tend to not like it when the ground references change and move with varying current draw. This chip is much smarter – it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels.

A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps. With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA. Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)

We include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load.

Usage is simple. Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your microcontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-. We have a detailed tutorial that will do all the gain, range and math for you – just plug and go with Arduino or CircuitPython!