INA282

現行

-14 至 80V、雙向電流感測放大器

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INA296B 現行 -5-V 至 110-V、雙向、1.1-MHz 8-V/µs 高精密電流感測放大器 Improved full-scale accuracy, increased bandwidth and a wider common-mode voltage range.

產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -14 Input offset (±) (max) (µV) 70 Input offset drift (±) (typ) (µV/°C) 0.3 Features Bidirectional, Low-side Capable Rating Catalog Voltage gain (V/V) 50 CMRR (min) (dB) 120 Bandwidth (kHz) 10 Iq (max) (mA) 0.9 Number of channels 1 Comparators (#) 0 Gain error (%) 1.4 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 0.2 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -14 Input offset (±) (max) (µV) 70 Input offset drift (±) (typ) (µV/°C) 0.3 Features Bidirectional, Low-side Capable Rating Catalog Voltage gain (V/V) 50 CMRR (min) (dB) 120 Bandwidth (kHz) 10 Iq (max) (mA) 0.9 Number of channels 1 Comparators (#) 0 Gain error (%) 1.4 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 0.2 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Wide Common-Mode Range: –14 V to +80 V
  • Offset Voltage: ±20 µV
  • CMRR: 140 dB
  • Accuracy:
    • ±1.4% Gain Error (Max)
    • 0.3 µV/°C Offset Drift
    • 0.005%/°C Gain Drift (Max)
  • Available Gains:
    • 50 V/V: INA282
    • 100 V/V: INA286
    • 200 V/V: INA283
    • 500 V/V: INA284
    • 1000 V/V: INA285
  • Quiescent Current: 900 µA (Max)
  • Wide Common-Mode Range: –14 V to +80 V
  • Offset Voltage: ±20 µV
  • CMRR: 140 dB
  • Accuracy:
    • ±1.4% Gain Error (Max)
    • 0.3 µV/°C Offset Drift
    • 0.005%/°C Gain Drift (Max)
  • Available Gains:
    • 50 V/V: INA282
    • 100 V/V: INA286
    • 200 V/V: INA283
    • 500 V/V: INA284
    • 1000 V/V: INA285
  • Quiescent Current: 900 µA (Max)

The INA28x family includes the INA282, INA283, INA284, INA285, and INA286 devices. These devices are voltage output current shunt monitors that can sense drops across shunts at common-mode voltages from –14 V to +80 V, independent of the supply voltage. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV full-scale.

These current sense amplifiers operate from a single +2.7-V to +18-V supply, drawing a maximum of 900 µA of supply current. These devices are specified over the extended operating temperature range of –40°C to +125°C, and offered in SOIC-8 and VSSOP-8 packages.

The INA28x family includes the INA282, INA283, INA284, INA285, and INA286 devices. These devices are voltage output current shunt monitors that can sense drops across shunts at common-mode voltages from –14 V to +80 V, independent of the supply voltage. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV full-scale.

These current sense amplifiers operate from a single +2.7-V to +18-V supply, drawing a maximum of 900 µA of supply current. These devices are specified over the extended operating temperature range of –40°C to +125°C, and offered in SOIC-8 and VSSOP-8 packages.

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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 INA28x High-Accuracy, Wide Common-Mode Range, Bidirectional Current Shunt Monitors, Zero-Drift Series datasheet (Rev. C) PDF | HTML 2015/5/12
應用說明 Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 2026/4/27
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 2023/4/12
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 2023/4/7
電子書 An Engineer's Guide to Current Sensing (Rev. B) 2022/4/12
選擇指南 Current Sense Amplifiers (Rev. E) 2021/9/20
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
應用說明 Hybrid Battery Charger with Load Control for Telecom Equipments (Rev. A) 2018/5/9
應用說明 Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout 2017/10/27
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 2017/6/17
Application brief Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers 2017/2/28
技術文章 How to get started with current sense amplifiers – part 4 PDF | HTML 2015/7/16
技術文章 How to get started with current sense amplifiers – part 3 PDF | HTML 2015/7/9
技術文章 How to get started with current sense amplifiers – part 2 PDF | HTML 2015/5/26
技術文章 How to get started with current sense amplifiers – part 1 PDF | HTML 2015/5/19
設計指南 EMC Compliant High-Side Current Sensing With Overvoltage Protection Design Guide 2014/2/13

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

INA282-286EVM — INA282-286 評估模組

The INA282-286EVM is intended to provide basic functional evaluation of this device family. The fixture layout is not intended to be a model for the target circuit, nor is it laid out for electromagnetic compatibility (EMC) testing. The INA282-286EVM allows the user to install a shunt resistor, (...)

使用指南: PDF
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模擬型號

INA282 PSpice Model (Rev. B)

SBOM447B.ZIP (1227 KB) - PSpice 模型
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模擬型號

INA282 TINA-TI Reference Design

SBOM449.TSC (144 KB) - TINA-TI 參考設計
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模擬型號

INA282 TINA-TI Spice Model

SBOM448.TSM (26 KB) - TINA-TI Spice 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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參考設計

TIDA-00126 — 符合 EMC 規範並具有過電壓保護的高壓側電流感測參考設計

此參考設計著重在使用 TI 的電壓輸出電流分流監控器系列的高壓側電流量測。可用於測量工業應用中的高壓側電流,其中共模動態可能降至接地以下。此設計整體有助於設計人員在電流分流監控器裝置周圍,建立符合電磁相容性 (EMC) 規範的電路,同時在 -14V 至 +80V 的廣泛共模電壓範圍內,實現高準確度的電流監控解決方案。

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參考設計

TIDA-00302 — 具瞬態穩定性的電流分流監控器參考設計

此高壓側電流分流監控器可用於測量電流通過电流感测電阻器時在电阻器上所形成的電壓。

此外,實作外部保護電路以提供突波和快速暫態保護,並針對 IEC61000-4-4 和 IEC61000-4-5 展示不同的抗擾度等級。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

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