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類比電流感測放大器

INA300

現行

36V 電流感測比較器

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產品規格表

INA300

現行
產品規格表 立即訂購

產品詳細資料

Product type Analog output with integrated comparator Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 650 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, Low-side Capable Rating Catalog CMRR (min) (dB) 100 Iq (max) (mA) 0.15 Number of channels 1 Comparators (#) 1 Operating temperature range (°C) -40 to 125
Product type Analog output with integrated comparator Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 650 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, Low-side Capable Rating Catalog CMRR (min) (dB) 100 Iq (max) (mA) 0.15 Number of channels 1 Comparators (#) 1 Operating temperature range (°C) -40 to 125
VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm) WSON (DSQ) 10 4 mm² (2 mm × 2 mm)
  • Wide Common-Mode Range: 0 V to 36 V
  • Selectable Response Times:
    • 10 µs, 50 µs, 100 µs
  • Programmable Threshold:
    • Adjust Using Single Resistor
    • Programmable From 0 mV to 250 mV
  • Accuracy:
    • Offset Voltage: ±500 µV (Maximum)
    • Offset Voltage Drift: 0.5 µV/°C (Maximum)
  • Selectable Hysteresis:
    • 2 mV, 4 mV, 8 mV
  • Active Quiescent Current: 135 µA (Maximum)
  • Selectable Disable Mode
    • Disabled Quiescent Current: 3.5 µA (Maximum)
    • Disabled Input Bias Current: 500 nA (Maximum)
  • Open-Drain Output With Latch Mode Available
  • Wide Common-Mode Range: 0 V to 36 V
  • Selectable Response Times:
    • 10 µs, 50 µs, 100 µs
  • Programmable Threshold:
    • Adjust Using Single Resistor
    • Programmable From 0 mV to 250 mV
  • Accuracy:
    • Offset Voltage: ±500 µV (Maximum)
    • Offset Voltage Drift: 0.5 µV/°C (Maximum)
  • Selectable Hysteresis:
    • 2 mV, 4 mV, 8 mV
  • Active Quiescent Current: 135 µA (Maximum)
  • Selectable Disable Mode
    • Disabled Quiescent Current: 3.5 µA (Maximum)
    • Disabled Input Bias Current: 500 nA (Maximum)
  • Open-Drain Output With Latch Mode Available

Designed for overcurrent protection applications, the INA300 is a current-sensing comparator that detects overcurrent by measuring the voltage developed across a shunt resistor, and comparing that voltage to the threshold voltage input level. The device measures this differential voltage signal on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage. The INA300 device features an adjustable threshold range that is set using a single external limit-setting resistor. A selectable hysteresis feature enables adjustable operation of the comparator to accommodate the wide input signal range of 0 mV to 250 mV.

An open-drain alert output on the device can be configured to operate in either a transparent mode where the output status follows the input state, or in a latched mode where the alert output is cleared when the latch is cleared. The device response time setting is selectable, which enables overcurrent alerts to be issued in as fast as 10 µs.

The INA300 device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 135 µA. The INA300 device is specified over the extended operating temperature range of –40°C to +125°C, and is available in WSON-10 and VSSOP-10 packages.

Designed for overcurrent protection applications, the INA300 is a current-sensing comparator that detects overcurrent by measuring the voltage developed across a shunt resistor, and comparing that voltage to the threshold voltage input level. The device measures this differential voltage signal on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage. The INA300 device features an adjustable threshold range that is set using a single external limit-setting resistor. A selectable hysteresis feature enables adjustable operation of the comparator to accommodate the wide input signal range of 0 mV to 250 mV.

An open-drain alert output on the device can be configured to operate in either a transparent mode where the output status follows the input state, or in a latched mode where the alert output is cleared when the latch is cleared. The device response time setting is selectable, which enables overcurrent alerts to be issued in as fast as 10 µs.

The INA300 device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 135 µA. The INA300 device is specified over the extended operating temperature range of –40°C to +125°C, and is available in WSON-10 and VSSOP-10 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 INA300 Overcurrent-Protection, Current-Sense Comparator datasheet (Rev. C) PDF | HTML 2021/6/18
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
電子書 An Engineer's Guide to Current Sensing (Rev. B) 2022/4/12
Application brief Measuring Current To Detect Out-of-Range Conditions (Rev. D) PDF | HTML 2022/3/10
Application brief Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) PDF | HTML 2021/10/4
選擇指南 Current Sense Amplifiers (Rev. E) 2021/9/20
Application brief Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) 2019/3/6
Circuit design Overcurrent event detection circuit 2018/7/31
Application brief Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) 2017/9/5
白皮書 Overcurrent protection enables more efficient and reliable systems 2016/5/16
技術文章 How to get started with current sense amplifiers – part 3 PDF | HTML 2015/7/9
技術文章 What are you sensing? Re-thinking system efficiency and reliability - part 1 PDF | HTML 2015/5/27
技術文章 How to get started with current sense amplifiers – part 2 PDF | HTML 2015/5/26
更多文件說明 Over-Current Detection Products Brochure 2014/8/14

設計與開發

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開發板

INA300EVM — INA300 評估模組

INA300 是一款高共模、精密、雙向的電流感測比較器，可配置為透過分流電阻器中開發的電壓來偵測過電流情況。  INA300 採用 2.7V 至 5.5V 的單一電源供應器供電運作，並可配置為在 0V 至 36V 的共模電壓下，偵測 0V 至 250mV 的分流電壓。INA300EVM 允許使用者透過跳線，輕鬆配置 INA300 裝置。

使用指南: PDF
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模擬型號

INA300 TINA-TI Reference Design (Rev. A)

SBOM880A.TSC (1606 KB) - TINA-TI 參考設計
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模擬型號

INA300 TINA-TI Spice Model (Rev. A)

SBOM879A.ZIP (9 KB) - TINA-TI Spice 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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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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參考設計

TIDA-00328 — 50 mA-20 A、單電源、低壓側或高壓側電流感測解決方案

此 TI 參考設計實作低壓側或高壓側寬動態範圍電流感測解決方案。  透過獨特的增益切換方法實現寬動態範圍。  硬體中的增益切換可提供比其他方法更快的回應時間。  此實作運用 INA225 高速多增益電流分流監控器，以及具有汲極斷路輸出的 INA300 電流分流監控器比較器。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSSOP (DGS) 10 Ultra Librarian
WSON (DSQ) 10 Ultra Librarian
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