INA231
- Bus voltage sensing from 0 V to 28 V
- High- or low-side sensing
- Current, voltage, and power reporting
- High accuracy:
- Gain error: 0.5% (maximum)
- Offset: 50 µV (maximum)
- Configurable averaging options
- Programmable alert threshold
- 1.8-V I2C compliant
- Power-supply operation: 2.7 V to 5.5 V
- Start-up mode options:
- INA231A: active conversion
- INA231B: low-current power down
The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing.
The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.
The INA231 is available in two versions: the INA231A starts up performing continuous conversions of the shunt and bus voltage, whereas the INA231B starts up in low-current, power-down mode.
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設計與開發
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SBOC434 — INA231EVM Rev A Software
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面,列出各種常見計算,從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外,此計算機還與類比工程師口袋參考中描述的概念相得益彰。
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SBOR021 — Power Monitor Tool
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFD) | 12 | Ultra Librarian |
| DSBGA (YFF) | 12 | Ultra Librarian |