INA231

現行

具警示功能並採用 wcsp 的 28V、16 位元、i2c 輸出電流/電壓/電源監測器

產品詳細資料

Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Iq (max) (mA) 0.42 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Intergrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Iq (max) (mA) 0.42 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Intergrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YFD) 12 2.28326 mm² (1.645 mm × 1.388 mm) DSBGA (YFF) 12 2.52000000000000018 mm² (— mm × — mm)
  • 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
  • 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.

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

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

INA231EVM — INA231 評估模組

INA231 評估模組 (EVM) 是一款易於使用的平台,可評估 INA231 裝置的主要功能與性能。

EVM 支援高達 10-A 的電流量測,並隨附圖形使用者介面 (GUI) 支援,可讀取及寫入裝置暫存器。

使用指南: PDF | HTML
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開發模組 (EVM) 的 GUI

SBOC434 — INA231EVM Rev A Software

INA231EVM Rev A Software
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模擬型號

INA231 IBIS Model

SBOM805.ZIP (45 KB) - IBIS 模型
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計算工具

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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計算工具

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

此 Excel 計算機提供兩個與五個標準電流感測放大器的比較,並提供包含各裝置基本參數的圖表。此計算機也會採用使用者的系統條件輸入,例如共模電壓、供應電壓、分流電阻器值與公差,然後在可調整電流範圍中繪製錯誤曲線。此外,計算機會根據計算的全刻度輸入電壓除以最大量測電流,輸出最大分流值 (mΩ)。
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計算工具

SBOR021 — Power Monitor Tool

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參考設計

TIDA-010057 — 超音波智慧探測器電源供應參考設計

醫學影像的顯著技術進步與高度整合,特別是手持式超音波智慧探測器,推進工程師開發出體積小巧且高效率、抗雜訊抗擾的電源解決方案。此參考設計記錄了我們具有 TX7332 傳送晶片和 AFE5832LP 接收晶片的高性能 128 通道 Tx/64 通道 Rx 超音波智慧探測器解決方案的端對端電源和資料解決方案。電源樹狀結構包括用於傳送的單級無變壓器 HV 產生(高達 +/- 80 V 且高度 <5 mm),以及來自 5V USB Type-C™ 輸入的 AFE 和 FPGA 負載點 LV。此設計可實現低雜訊(<10mV 漣波)高效電源軌,以及更出色的熱性能(溫度上升 < 10°C),實現系統效率提升 ~80%,接收資料 SNR >55dB,以及超精巧尺寸 (90mm x 45mm x 20mm)。所有電源軌皆可使用我們的整合式緩衝分壓器 CDCE949 與外部時脈同步。此設計也支援 1S 電池輸入,正常超音波運作可長達 2 小時。
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參考設計

TIDA-010269 — 手持式超音波成像裝置電源供應參考設計

此參考設計專為強化採用新一代發射器與接收器的新一代 128 通道超音波智慧探測器而打造。尺寸精巧 (80mm × 45mm × 20mm),包含所有 128 通道智慧探測器的電源功能,且效率高於 80%。這款無變壓器高電壓電源供應器(25mA 時為 ±75V)是全新升壓穩壓器,可讓參考設計符合大多數智慧探測器應用。
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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

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