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配備整合式分流電阻器的類比電流感測放大器

INA253-Q1

現行

具 PWM 抑制和整合式分流電阻器的 AEC-Q100 80V、雙向、精密電流感測放大器

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產品規格表

INA253-Q1

現行
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產品詳細資料

Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Gain error (%) 0.4 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 120 Bandwidth (kHz) 350 Iq (max) (mA) 2.6 Features Bidirectional, Enhanced PWM Rejection, Integrated Shunt, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Gain error (%) 0.4 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 120 Bandwidth (kHz) 350 Iq (max) (mA) 2.6 Features Bidirectional, Enhanced PWM Rejection, Integrated Shunt, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40 °C to +125 °C, TA
  • Functional Safety-Capable
  • Precision integrated shunt resistor
    • Shunt resistor: 2 mΩ
    • Shunt inductance: 3 nH
    • Shunt resistor tolerance: 0.1% (maximum)
    • ±15 A continuous from –40 °C to +85 °C
    • 0 °C to 125 °C temperature coefficient: 10 ppm/°C
  • High bandwidth: 350 kHz
  • Enhanced PWM rejection
  • Excellent CMRR
    • > 120-dB DC CMRR
    • 90-dB AC CMRR at 50 kHz
  • Accuracy:
    • Gain:
      • Gain error: 0.4% (maximum)
      • Gain drift: 45 ppm/°C (maximum)
    • Offset:
      • Offset current: ±15 mA (maximum)
      • Offset drift: 125 µA/°C (maximum)
  • Wide common-mode range: –4 V to +80 V
  • Available gains: 100 mV/A, 200 mV/A, and 400 mV/A
  • Quiescent current: 2.4 mA (maximum)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40 °C to +125 °C, TA
  • Functional Safety-Capable
  • Precision integrated shunt resistor
    • Shunt resistor: 2 mΩ
    • Shunt inductance: 3 nH
    • Shunt resistor tolerance: 0.1% (maximum)
    • ±15 A continuous from –40 °C to +85 °C
    • 0 °C to 125 °C temperature coefficient: 10 ppm/°C
  • High bandwidth: 350 kHz
  • Enhanced PWM rejection
  • Excellent CMRR
    • > 120-dB DC CMRR
    • 90-dB AC CMRR at 50 kHz
  • Accuracy:
    • Gain:
      • Gain error: 0.4% (maximum)
      • Gain drift: 45 ppm/°C (maximum)
    • Offset:
      • Offset current: ±15 mA (maximum)
      • Offset drift: 125 µA/°C (maximum)
  • Wide common-mode range: –4 V to +80 V
  • Available gains: 100 mV/A, 200 mV/A, and 400 mV/A
  • Quiescent current: 2.4 mA (maximum)

The INA253-Q1 is an automotive, voltage-output, current sense amplifier with an integrated shunt resistor of 2 mΩ. The INA253-Q1 monitors bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 100 mV/A, 200 mV/A, and 400 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration-equivalent measurement accuracy, ultra-low temperature-drift performance of 15 ppm/ °C, and an optimized Kelvin layout for the sensing resistor.

The INA253-Q1 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in a motor-drive application, and for solenoid valve-control applications.

This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 3 mA of supply current. All gain versions are specified over the operating temperature range of –40 °C to +125 °C, and are available in a 20-pin TSSOP package.

The INA253-Q1 is an automotive, voltage-output, current sense amplifier with an integrated shunt resistor of 2 mΩ. The INA253-Q1 monitors bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 100 mV/A, 200 mV/A, and 400 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration-equivalent measurement accuracy, ultra-low temperature-drift performance of 15 ppm/ °C, and an optimized Kelvin layout for the sensing resistor.

The INA253-Q1 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in a motor-drive application, and for solenoid valve-control applications.

This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 3 mA of supply current. All gain versions are specified over the operating temperature range of –40 °C to +125 °C, and are available in a 20-pin TSSOP 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 INA253-Q1 AEC-Q100, 80-V, Bidirectional, Precision Current Sense Amplifier With PWM Rejection and Integrated Shunt Resistor datasheet (Rev. A) PDF | HTML 2020/1/8
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 Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 2023/4/12
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML 2023/4/7
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML 2023/4/7
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 2023/4/7
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 2023/4/7
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 2022/8/15
功能安全資訊 INA253-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/1/25
技術文章 Current-sensing dynamics in automotive solenoids PDF | HTML 2019/11/1
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 2017/6/17

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

INA253EVM — 具有簡易測試存取權限的 INA253 電流感測評估模組

INA253EVM 包含一個 PCB，並可選擇裁切三個獨立 PCB。  每個 PCB 斷路器都包含 INA253Ax 裝置（電路板 1 至 3 的 Ax 分別為 A1、A2 和 A3）及外部硬體連線的測試點。
使用指南: PDF
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模擬型號

INA253 TINA-TI Reference Design

SLOM452.TSC (453 KB) - TINA-TI 參考設計
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模擬型號

INA253 TINA-TI Spice Model

SLOM451.ZIP (24 KB) - TINA-TI Spice 模型
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模擬型號

INA253A1 PSpice Model

SLOM499.ZIP (23 KB) - PSpice 模型
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模擬型號

INA253A2 PSpice Model

SLOM496.ZIP (23 KB) - PSpice 模型
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INA253A3 PSpice Model

SLOM492.ZIP (23 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-020023 — 具有高精確度電流感測器的汽車正比電磁閥驅動參考設計

此參考設計展示如何使用簡單的推挽輸出比較器和高準確度的整合式電流分流監控器，來實現精確的比例電磁閥驅動。在車輛自動變速箱中，精確且準確控制比例電磁閥對於更平順的駕駛性能特別必要。此設計解決影響電磁閥精確定位的兩個主要因素：驅動和電流感測在溫度變化下的準確度。
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TSSOP (PW) 20 Ultra Librarian
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