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INA187

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-2V 至 40V 雙向 650kHz 精確電流感測放大器

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INA187

現行
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產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 42 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 150 Features Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 110 Bandwidth (kHz) 230, 450, 650 Iq (max) (mA) 0.6 Number of channels 1 Comparators (#) 0 Gain error (%) 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 2.5 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 42 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 150 Features Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 110 Bandwidth (kHz) 230, 450, 650 Iq (max) (mA) 0.6 Number of channels 1 Comparators (#) 0 Gain error (%) 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 2.5 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • Wide common-mode voltage:
    • Operational voltage: −2V to +42V
    • Survival voltage: −12V to +48V
  • Bidirectional operation
  • High small signal bandwidth: 650kHz (20V/V Gain)
  • Slew rate: 2.5V/µs
  • Step response settling time to 1%: 6.5µs
  • High CMRR: 120dB
  • Gain error (maximum) : ±0.25%, ±10ppm/°C drift
  • Offset voltage (maximum): ±150µV, ±0.5µV/°C drift
  • Operates from 2.7V to 12V supply
  • Operational current: 650µA
  • Available gains:
    • INA187A1: 20V/V
    • INA187A2: 50V/V
    • INA187A3: 100V/V
  • Package options: SOT23-6 (DBV)
  • Wide common-mode voltage:
    • Operational voltage: −2V to +42V
    • Survival voltage: −12V to +48V
  • Bidirectional operation
  • High small signal bandwidth: 650kHz (20V/V Gain)
  • Slew rate: 2.5V/µs
  • Step response settling time to 1%: 6.5µs
  • High CMRR: 120dB
  • Gain error (maximum) : ±0.25%, ±10ppm/°C drift
  • Offset voltage (maximum): ±150µV, ±0.5µV/°C drift
  • Operates from 2.7V to 12V supply
  • Operational current: 650µA
  • Available gains:
    • INA187A1: 20V/V
    • INA187A2: 50V/V
    • INA187A3: 100V/V
  • Package options: SOT23-6 (DBV)

The INA187 is a precise, bidirectional current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –2V to 42V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±150µV, maximum), small gain error (±0.25%, maximum) and a high DC CMRR (typical 120dB). The INA187 is not only designed for bidirectional DC current measurements, but also for high-speed applications (such as transient detection and fast overcurrent protection) with a high signal bandwidth of 650kHz and fast settling time.

The INA187 operates from a single 2.7V to 12V supply, drawing 650µA of supply current. The INA187 is available in three gain options: 20V/V, 50V/V, 100V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA187 is specified over operating temperature range of −40°C to +125°C and is offered in a 6-pin SOT-23 package.

The INA187 is a precise, bidirectional current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –2V to 42V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±150µV, maximum), small gain error (±0.25%, maximum) and a high DC CMRR (typical 120dB). The INA187 is not only designed for bidirectional DC current measurements, but also for high-speed applications (such as transient detection and fast overcurrent protection) with a high signal bandwidth of 650kHz and fast settling time.

The INA187 operates from a single 2.7V to 12V supply, drawing 650µA of supply current. The INA187 is available in three gain options: 20V/V, 50V/V, 100V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA187 is specified over operating temperature range of −40°C to +125°C and is offered in a 6-pin SOT-23 package.
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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 INA187 -2V to 42V , Bi-directional, 650kHz, High-Precision Current Sense Amplifier datasheet (Rev. A) PDF | HTML 2025/9/4
證書 INA187EVM EU Declaration of Conformity (DoC) 2025/2/19

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開發板

INA187EVM — INA187 評估模組

INA187EVM 是一個小型模組，具有三個完全獨立的電路板，可由設計人員拆開。INA187 的三個增益變體的每一個，都可以使用三個結構相同的電路板，具有最高 42V 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，以及 VIN+ 和 VIN-的端子區塊測試點。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。
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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。

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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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