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INA241B-Q1

現行

具增強 PWM 抑制的 AEC-Q100 -4V 至 110V 雙向高精密電流感測放大器

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產品規格表

INA241B-Q1

現行
產品規格表 立即訂購

產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -5 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.5 Features Bidirectional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 10, 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 1100 Iq (max) (mA) 3.2 Number of channels 1 Comparators (#) 0 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 5 Slew rate (V/µs) 5 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -5 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.5 Features Bidirectional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 10, 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 1100 Iq (max) (mA) 3.2 Number of channels 1 Comparators (#) 0 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 5 Slew rate (V/µs) 5 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm) SOT-23-THN (DDF) 8 8.12 mm² (2.9 mm × 2.8 mm) VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature Grade 1: −40°C to 125°C, TA
    • Temperature Grade 0: −40°C to 150°C, TA
  • Functional Safety-Capable
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125kHz
  • Wide common-mode voltage:
    • Operational voltage: −5V to 110V
    • Survival voltage: −20V to 120V
  • Bidirectional operation
  • High small signal bandwidth: 1.1MHz (at all gains)
  • Slew rate: 8V/µs
  • Step response settling time to 1%: 1µs
  • Excellent CMRR
    • 166dB DC-CMRR
    • 104dB AC-CMRR at 100kHz
    • 89dB AC-CMRR at 1MHz
  • Accuracy:
    • Gain error (maximum)
      • Version A: ±0.01%, ±1ppm/°C drift
      • Version B: ±0.1%, ±5ppm/°C drift
    • Offset voltage (maximum)
      • Version A: ±10µV, ±0.1µV/°C drift
      • Version B: ±150µV, ±0.5µV/°C drift
  • Available gains:
    • INA241A1-Q1 : 10V/V
    • INA241A2-Q1 : 20V/V
    • INA241A3-Q1 : 50V/V
    • INA241A4-Q1 : 100V/V
    • INA241A5-Q1 : 200V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8, VSSOP-10
  • AEC-Q100 qualified for automotive applications:
    • Temperature Grade 1: −40°C to 125°C, TA
    • Temperature Grade 0: −40°C to 150°C, TA
  • Functional Safety-Capable
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125kHz
  • Wide common-mode voltage:
    • Operational voltage: −5V to 110V
    • Survival voltage: −20V to 120V
  • Bidirectional operation
  • High small signal bandwidth: 1.1MHz (at all gains)
  • Slew rate: 8V/µs
  • Step response settling time to 1%: 1µs
  • Excellent CMRR
    • 166dB DC-CMRR
    • 104dB AC-CMRR at 100kHz
    • 89dB AC-CMRR at 1MHz
  • Accuracy:
    • Gain error (maximum)
      • Version A: ±0.01%, ±1ppm/°C drift
      • Version B: ±0.1%, ±5ppm/°C drift
    • Offset voltage (maximum)
      • Version A: ±10µV, ±0.1µV/°C drift
      • Version B: ±150µV, ±0.5µV/°C drift
  • Available gains:
    • INA241A1-Q1 : 10V/V
    • INA241A2-Q1 : 20V/V
    • INA241A3-Q1 : 50V/V
    • INA241A4-Q1 : 100V/V
    • INA241A5-Q1 : 200V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8, VSSOP-10

The INA241x-Q1 is an ultra-precise, bidirectional current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –5V to 110V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166dB). The INA241x-Q1 is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device inputs. The enhanced PWM rejection circuitry inside the INA241x-Q1 provides minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x-Q1 operates from a supply of 2.7V to 20V, drawing 2.5mA of supply current. The INA241x-Q1 is available in five gain options: 10V/V, 20V/V, 50V/V, 100V/V, and 200V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA241x-Q1Grade 1 is specified over operating temperature range of −40°C to 125°C and Grade 0 over operating temperature range of −40°C to 150°C.

The INA241x-Q1 is an ultra-precise, bidirectional current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –5V to 110V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166dB). The INA241x-Q1 is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device inputs. The enhanced PWM rejection circuitry inside the INA241x-Q1 provides minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x-Q1 operates from a supply of 2.7V to 20V, drawing 2.5mA of supply current. The INA241x-Q1 is available in five gain options: 10V/V, 20V/V, 50V/V, 100V/V, and 200V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA241x-Q1Grade 1 is specified over operating temperature range of −40°C to 125°C and Grade 0 over operating temperature range of −40°C to 150°C.
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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 INA241x-Q1 AEC-Q100, –5V to 110V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. D) PDF | HTML 2025/6/9
應用說明 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024/11/18
功能安全資訊 INA241x-Q1 and INA296x-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2024/1/29
類比設計期刊 Second-sourcing options for small-package amplifiers 2018/3/26

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

INA241AEVM — 具有 PWM 抑制功能且適用於 -5-V 至 110-V 1.1-MHz 電流感測放大器的 INA241x 評估模組

INA241AEVM 是一個小型模組，具有五個完全獨立的電路板，可由設計人員拆開。INA241x 的五個增益變體的每一個，都可以使用五個結構相同的電路板，具有最高 110-V 共模輸入範圍和 10-A (板載分流) 輸入功能。

各電路板都會提供 VS、GND、OUT 和 Vin+ 和 Vin- 的端子區塊的測試點。焊盤和插槽允許快速實作輸入和輸出濾波，以及板載 2512 尺寸的分流電阻器。

使用指南: PDF | HTML
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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

TIDM-02022 — 具有耦合電感器的 2kW 四相交錯式降壓轉換器參考設計

數據中心功耗大幅上升，帶動了對高功率密度之高效能 DC/DC 磚式轉換器的需求。隔離拓撲結構雖然廣泛使用，但控制卻不容易。與電感-電感-電容 (LLC) 等隔離拓撲結構相比，採用耦合電感之多相同步降壓拓撲結構，具備更好的負載暫態性能，且更容易控制。此參考設計展現使用 C2000™ 微控制器的功率級進行電壓模式控制。

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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
SOT-23-THN (DDF) 8 Ultra Librarian
VSSOP (DGS) 10 Ultra Librarian
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