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類比電流感測放大器

INA301-Q1

現行

具比較器的 AEC-Q100、36V、550kHz、4V/µs、高精度電流感測放大器

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產品規格表

INA301-Q1

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) 35, 50, 125 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 450, 500, 550 Iq (max) (mA) 0.7 Number of channels 1 Comparators (#) 1 Gain error (%) 0.1, 0.15, 0.2 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 TI functional safety category Functional Safety-Capable 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) 35, 50, 125 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 450, 500, 550 Iq (max) (mA) 0.7 Number of channels 1 Comparators (#) 1 Gain error (%) 0.1, 0.15, 0.2 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: 0 V to 36 V
  • Dual output: amplifier and comparator output
  • High accuracy amplifier:
    • Offset voltage: 35 µV (maximum)
    • Offset voltage drift: 0.5 µV/°C (maximum)
    • Gain error: 0.1% (maximum)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA301A1-Q1: 20 V/V
    • INA301A2-Q1: 50 V/V
    • INA301A3-Q1: 100 V/V
  • Programmable alert threshold set through a single resistor
  • Total alert response time: 1 µs
  • Open-drain output with both transparent and latching modes
  • Package: VSSOP-8
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: 0 V to 36 V
  • Dual output: amplifier and comparator output
  • High accuracy amplifier:
    • Offset voltage: 35 µV (maximum)
    • Offset voltage drift: 0.5 µV/°C (maximum)
    • Gain error: 0.1% (maximum)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA301A1-Q1: 20 V/V
    • INA301A2-Q1: 50 V/V
    • INA301A3-Q1: 100 V/V
  • Programmable alert threshold set through a single resistor
  • Total alert response time: 1 µs
  • Open-drain output with both transparent and latching modes
  • Package: VSSOP-8

The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to provide overcurrent protection by measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. This device features an adjustable limit-threshold range that is set using a single external limit-setting resistor. This current-shunt monitor measures differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage.

The open-drain alert output 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 reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.

The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to provide overcurrent protection by measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. This device features an adjustable limit-threshold range that is set using a single external limit-setting resistor. This current-shunt monitor measures differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage.

The open-drain alert output 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 reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.
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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 INA301-Q1 36-V, Automotive, High-Speed, Zero-Drift, Voltage-Output Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator datasheet (Rev. B) PDF | HTML 2022/4/1
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 Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 2023/4/7
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 2022/10/17
Application brief Measuring Current To Detect Out-of-Range Conditions (Rev. D) PDF | HTML 2022/3/10
功能安全資訊 INA301-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/10/11
Application brief Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) PDF | HTML 2021/10/4
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 2021/9/29
選擇指南 Current Sense Amplifiers (Rev. E) 2021/9/20
Application brief High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) PDF | HTML 2021/2/23
技術文章 Use fast, precise overcurrent detection to enable diagnostics in automotive safety PDF | HTML 2019/6/24
Application brief Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) 2019/3/6
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 2019/2/19
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

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開發板

INA301EVM — INA301 評估模組

同一個 EVM 封裝中提供三種不同的增益裝置，讓客戶能視需求快速設定並評估任何或所有裝置。

使用指南: PDF
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模擬型號

INA301 PSpice Model

SBOMA60.ZIP (71 KB) - PSpice 模型
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模擬型號

INA301 TINA-TI Reference Design (Rev. A)

SBOM959A.TSC (468 KB) - TINA-TI 參考設計
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模擬型號

INA301 TINA-TI Spice Model (Rev. A)

SBOM960A.ZIP (22 KB) - TINA-TI Spice 模型
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模擬型號

INA301A1 PSpice Model

SBOMBH1.ZIP (28 KB) - PSpice 模型
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模擬型號

INA301A2 PSpice Model

SBOMBF4.ZIP (27 KB) - PSpice 模型
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模擬型號

INA301A3 PSpice Model

SBOMBH2.ZIP (28 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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參考設計

TIDA-01543 — 具有過電流偵測且適用於牽引逆變器的隔離式電流感測參考設計 (±300 A)

此 參考設計可偵測牽引馬達相位電流。TIDA-01543 實現隔離式電流感測器。透過 AMC1305M05-Q1 ΔΣ 調變器和 INA301-Q1 裝置，可實現精密的直列式分流馬達相位電流感測。調變器的高 CMTI 有助於抑制逆變器切換暫態，以免損毀控制器端的資料。INA301-Q1 的快速反應時間可加快過電流事件的反應時間。TIDA-01543 提供的介面能夠連接外部 MCU，可在其中執行數位 SINC 濾波器，以解調 AMC1305M05 輸出位元流。此 參考設計採用 C2000 系列，亦即符合車用資格的 F280049M Piccolo™ 微控制器控制卡。
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VSSOP (DGK) 8 Ultra Librarian
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