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INA4181

現行

26V、四通道、雙向 350 kHz 電流感測放大器

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INA4181

現行
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產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.2 Features Bidirectional, Low-side Capable, Quad channel Rating Catalog Voltage gain (V/V) 20, 50, 100, 200 CMRR (min) (dB) 84 Bandwidth (kHz) 105, 150, 210, 350 Iq (max) (mA) 1 Number of channels 4 Comparators (#) 0 Gain error (%) 0.8 Gain error drift (±) (max) (ppm/°C) 20 Slew rate (V/µs) 2 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.2 Features Bidirectional, Low-side Capable, Quad channel Rating Catalog Voltage gain (V/V) 20, 50, 100, 200 CMRR (min) (dB) 84 Bandwidth (kHz) 105, 150, 210, 350 Iq (max) (mA) 1 Number of channels 4 Comparators (#) 0 Gain error (%) 0.8 Gain error drift (±) (max) (ppm/°C) 20 Slew rate (V/µs) 2 Operating temperature range (°C) -40 to 125
TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • Common-mode range (V CM): –0.2 V to +26 V
  • High bandwidth: 350 kHz (A1 devices)
  • Offset voltage:
    • ±150 µV (maximum) at V CM = 0 V
    • ±500 µV (maximum) at V CM = 12 V
  • Output slew rate: 2 V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • ±1% gain error (maximum)
    • 1-µV/°C offset drift (maximum)
  • Gain options:
    • 20 V/V (A1 devices)
    • 50 V/V (A2 devices)
    • 100 V/V (A3 devices)
    • 200 V/V (A4 devices)
  • Quiescent current: 260 µA maximum (INA181)
  • Common-mode range (V CM): –0.2 V to +26 V
  • High bandwidth: 350 kHz (A1 devices)
  • Offset voltage:
    • ±150 µV (maximum) at V CM = 0 V
    • ±500 µV (maximum) at V CM = 12 V
  • Output slew rate: 2 V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • ±1% gain error (maximum)
    • 1-µV/°C offset drift (maximum)
  • Gain options:
    • 20 V/V (A1 devices)
    • 50 V/V (A2 devices)
    • 100 V/V (A3 devices)
    • 200 V/V (A4 devices)
  • Quiescent current: 260 µA maximum (INA181)

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.

The INA181 is available in both the 6-pin, SOT-23 and SC70 packages. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.

The INA181 is available in both the 6-pin, SOT-23 and SC70 packages. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.
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INA4180 現行 26V、四通道、350 kHz 電流感測放大器 The INA4180 offers the same performance for unidirectional applications.

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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 INAx181 Bidirectional,Low- and High-Side Voltage Output,Current-Sense Amplifiers datasheet (Rev. H) PDF | HTML 2023/11/29
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 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024/11/18
Application brief Improving Power Amplifier Efficiency With Current Monitors (Rev. B) PDF | HTML 2023/7/24
電子書 An Engineer's Guide to Current Sensing (Rev. B) 2022/4/12
Application brief Common Uses for Multichannel Current Monitoring (Rev. A) PDF | HTML 2021/9/27
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
電子書 E-book: An engineer’s guide to industrial robot designs 2020/2/12
Application brief Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) 2019/3/6
應用說明 Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout 2017/10/27
應用說明 Low Cost Bidirectional Current Sensing Using INA181 2017/7/28
Application brief Low-Side Current Sense Circuit Integration 2017/3/30

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

INA4180-4181EVM — INA4180 和 INA4181 電流感測放大器評估模組

INA4180 是一款整合式電流感測監控解決方案，可為成本敏感型應用提供易用性和高性能。INA4181 擁有與雙向電流測量支援相同的功能。INA4180-4181EVM 旨在提供對裝置系列的基本功能評估。此固定裝置配置不作為目標電路模型使用，也非為電磁 (EMI) 測試進行布局。INA4180-4181EVM 包含單一 PCB，可分為 8 個獨立部分以評估不同的裝置變體。
使用指南: PDF
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模擬型號

INA181 PSpice Model (Rev. B)

SBOMAD5B.ZIP (2070 KB) - PSpice 模型
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模擬型號

INA181 TINA-TI Reference Design (Rev. B)

SBOMAD4B.TSC (2820 KB) - TINA-TI 參考設計
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模擬型號

INA181 TINA-TI Spice Model (Rev. A)

SBOMAD3B (49 KB) - TINA-TI Spice 模型
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模擬型號

INA181A1 PSpice Model

SBOMBB7.ZIP (21 KB) - PSpice 模型
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模擬型號

INA181A2 PSpice Model

SBOMBB8.ZIP (22 KB) - PSpice 模型
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模擬型號

INA181A3 PSpice Model

SBOMBF2.ZIP (22 KB) - PSpice 模型
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模擬型號

INA181A4 PSpice Model

SBOMBC5.ZIP (21 KB) - PSpice 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-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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TSSOP (PW) 20 Ultra Librarian
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