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INA190

現行

具有 picoamp IB 和啟用功能的 40-V、雙向、超精密電流感測放大器

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產品規格表

INA190

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) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
SOT-SC70 (DCK) 6 4.2 mm² (2 mm × 2.1 mm) UQFN (RSW) 10 2.52 mm² (1.8 mm × 1.4 mm) SOT-23-THN (DDF) 8 8.12 mm² (2.9 mm × 2.8 mm)
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (max)
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Common-mode rejection ratio: 132 dB (min)
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 7 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 80 nV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1: 25 V/V
    • INA190A2: 50 V/V
    • INA190A3: 100 V/V
    • INA190A4: 200 V/V
    • INA190A5: 500 V/V
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (max)
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Common-mode rejection ratio: 132 dB (min)
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 7 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 80 nV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1: 25 V/V
    • INA190A2: 50 V/V
    • INA190A3: 100 V/V
    • INA190A4: 200 V/V
    • INA190A5: 500 V/V

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23 packages.

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23 packages.

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INA191 現行 採用 WCSP 封裝、具有 picoamp IB 和啟用功能的 40V、超精密電流感測放大器 The INA191 is functionally identical in WCSP

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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 INA190 Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Precision Current-Sense Amplifier With Enable datasheet (Rev. D) PDF | HTML 2019/11/9
應用說明 Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 2026/4/27
應用說明 Optimal Layout Practices for Low-Ohmic Current Sense Resistors in Parallel PDF | HTML 2025/11/12
應用說明 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024/11/18
Circuit design Low (microamp), high-side, current-sensing circuit with current-sensing amp (Rev. A) PDF | HTML 2024/9/25
Circuit design High-side current shunt monitor circuit to 3-V single-ended ADC (Rev. A) PDF | HTML 2024/9/20
Application brief Current Sensing Applications in Communication Infrastructure Equipment (Rev. C) PDF | HTML 2023/8/8
Application brief Improving Power Amplifier Efficiency With Current Monitors (Rev. B) PDF | HTML 2023/7/24
應用說明 Under the Hood: Full-Scale & Dynamic Range Considerations of Current Sense Amps PDF | HTML 2022/11/18
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 2022/10/17
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
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 2020/12/2
技術文章 The need for current sensing in optical modules for 100G and beyond PDF | HTML 2019/3/15
Application brief Precision, Low-Side Current Measurement (Rev. B) 2019/3/6
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 2019/2/19

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

INA190EVM — 具有低電流佈線圖的 INA190 電流感測評估模組

這是一個小型模組，具有 6 個完全獨立的電路板，可由使用者拆開。五個相同的電路板 (20A 額定值) 可用於五個裝置增益變體。第六塊具有特殊防護佈局的電路板（10A 額定值）可用於特別低電流量測系統。每塊電路板均具有適用於 VS、GND、OUT、REF 和兩個接頭的測試點，這兩個接頭可將 ENABLE 針腳跳接至 GND 或 VS，並將 VREF 針腳跳接至 GND 或由板載緩衝器電路設定的電壓電源。ENABLE 和 REF 針腳也可由外部來源驅動。
使用指南: PDF
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模擬型號

INA190 TINA-TI Reference Design (Rev. B)

SBOMAI7B.TSC (196 KB) - TINA-TI 參考設計
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模擬型號

INA190 TINA-TI Spice Model (Rev. C)

SBOMAI6C.ZIP (60 KB) - TINA-TI Spice 模型
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模擬型號

INA190A1 PSpice Model

SBOMB97.ZIP (29 KB) - PSpice 模型
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模擬型號

INA190A2 PSpice Model

SBOMB94.ZIP (29 KB) - PSpice 模型
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模擬型號

INA190A3 PSpice Model

SBOMB95.ZIP (29 KB) - PSpice 模型
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模擬型號

INA190A4 PSpice Model

SBOMBB0.ZIP (29 KB) - PSpice 模型
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模擬型號

INA190A5 PSpice Model

SBOMB96.ZIP (30 KB) - PSpice 模型
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模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)

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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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設計工具

CIRCUIT060039 — 具有電流感測放大器的低 (微安培)、高壓側、電流感測電路

此電路展示如何使用電流感測放大器準確且穩固地測量少量微安培電流，並得到最大動態範圍。下列錯誤分析可套用於許多電流感測放大器。此設計仰賴使用精密、低輸入偏壓電流感測放大器，並分析大型分流電阻器上因輸入偏壓電流而產生的動態誤差。
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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
SOT-SC70 (DCK) 6 Ultra Librarian
UQFN (RSW) 10 Ultra Librarian
SOT-23-THN (DDF) 8 Ultra Librarian
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