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INA190-Q1

現行

具 picoamp IB 和啓用功能的 AEC-Q100、40V、雙向、超精密電流感測放大器

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產品規格表

INA190-Q1

現行
產品規格表 立即訂購

產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Automotive Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Automotive Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Low input bias currents: 500 pA (typical) (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (maximum)
    • Low quiescent current: 50 µA at 25°C (typical)
  • Accuracy:
    • Common-mode rejection ratio: 132 dB (minimum)
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 7 ppm/°C (maximum)
    • Offset voltage, VOS: ±15 µV (maximum)
    • Offset drift: 80 nV/°C (maximum)
  • Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1-Q1: 25 V/V
    • INA190A2-Q1: 50 V/V
    • INA190A3-Q1: 100 V/V
    • INA190A4-Q1: 200 V/V
    • INA190A5-Q1: 500 V/V
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Low input bias currents: 500 pA (typical) (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (maximum)
    • Low quiescent current: 50 µA at 25°C (typical)
  • Accuracy:
    • Common-mode rejection ratio: 132 dB (minimum)
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 7 ppm/°C (maximum)
    • Offset voltage, VOS: ±15 µV (maximum)
    • Offset drift: 80 nV/°C (maximum)
  • Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1-Q1: 25 V/V
    • INA190A2-Q1: 50 V/V
    • INA190A3-Q1: 100 V/V
    • INA190A4-Q1: 200 V/V
    • INA190A5-Q1: 500 V/V

The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in SC70 and SOT-23 packages.

The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in SC70 and SOT-23 packages.
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重要文件 類型 標題 格式選項 日期
* Data sheet INA190-Q1 AEC-Q100, 40-V, Bidirectional, Ultra-Precise Current Sense Amplifier With picoamp IB and ENABLE datasheet (Rev. A) PDF | HTML 2022年 3月 28日
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024年 11月 18日
Circuit design Low (microamp), high-side, current-sensing circuit with current-sensing amp (Rev. A) PDF | HTML 2024年 9月 25日
Circuit design High-side current shunt monitor circuit to 3-V single-ended ADC (Rev. A) PDF | HTML 2024年 9月 20日
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 2022年 10月 17日
Functional safety information INA190-Q1 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2022年 4月 5日
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 2022年 1月 25日
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 2020年 12月 2日
Technical article Dark-current measurement in automotive telematics applications PDF | HTML 2020年 3月 4日
Application brief Precision, Low-Side Current Measurement (Rev. B) 2019年 3月 6日
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 2019年 2月 19日

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開發板

INA190EVM — 具有低電流佈線圖的 INA190 電流感測評估模組

這是一個小型模組，具有 6 個完全獨立的電路板，可由使用者拆開。五個相同的電路板 (20A 額定值) 可用於五個裝置增益變體。第六塊具有特殊防護佈局的電路板（10A 額定值）可用於特別低電流量測系統。每塊電路板均具有適用於 VS、GND、OUT、REF 和兩個接頭的測試點，這兩個接頭可將 ENABLE 針腳跳接至 GND 或 VS，並將 VREF 針腳跳接至 GND 或由板載緩衝器電路設定的電壓電源。ENABLE 和 REF 針腳也可由外部來源驅動。
使用指南: PDF
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模擬型號

INA190 TINA-TI Reference Design (Rev. B)

SBOMAI7B.TSC (196 KB) - TINA-TI Reference Design
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INA190 TINA-TI Spice Model (Rev. C)

SBOMAI6C.ZIP (60 KB) - TINA-TI Spice Model
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INA190A1 PSpice Model

SBOMB97.ZIP (29 KB) - PSpice Model
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INA190A2 PSpice Model

SBOMB94.ZIP (29 KB) - PSpice Model
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INA190A3 PSpice Model

SBOMB95.ZIP (29 KB) - PSpice Model
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INA190A4 PSpice Model

SBOMBB0.ZIP (29 KB) - PSpice Model
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INA190A5 PSpice Model

SBOMB96.ZIP (30 KB) - PSpice Model
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計算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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CIRCUIT060035 — 具有窗型比較器電路的雙向電流感測

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CIRCUIT060037 — 精密過電流閂鎖電路

這個高壓側電流感測解決方案採用電流感測放大器、含整合式參考的比較器以及 P 通道 MOSFET，以建立過電流閂鎖電路。當偵測到負載電流大於 200 mA 時，電路會中斷系統與電源的連接。比較器輸出將閂鎖 (將 P 通道 MOSFET 的閘極電壓保持在 0 V)，直到電路的電源開始循環，因為比較器會驅動 P 通道 MOSFET 的閘極，並將訊號傳送回電流感測放大器的參考針腳。
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

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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

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23-THN (DDF) 8 Ultra Librarian
SOT-SC70 (DCK) 6 Ultra Librarian
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