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電流感測放大器
數位電源監測器

INA239-Q1

現行

AEC-Q100、85-V、16 位元、高精密度、SPI 輸出電流/電壓/電源監測器

立即訂購
產品規格表

INA239-Q1

現行
產品規格表 立即訂購

產品詳細資料

Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.3 Digital interface SPI Resolution (Bits) 16 Input offset (±) (max) (µV) 5, 10 Input offset drift (±) (max) (µV/°C) 0.02, 0.1 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 126 Iq (max) (mA) 1.2 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 25 Features Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Low-side Capable, SPI Number of channels 1 Power measurement accuracy (%) 0.2 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.3 Digital interface SPI Resolution (Bits) 16 Input offset (±) (max) (µV) 5, 10 Input offset drift (±) (max) (µV/°C) 0.02, 0.1 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 126 Iq (max) (mA) 1.2 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 25 Features Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Low-side Capable, SPI Number of channels 1 Power measurement accuracy (%) 0.2 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 125
VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • High-resolution, 16-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±5 µV (maximum)
    • Offset drift: ±0.02 µV/°C (maximum)
    • Gain error: ±0.1% (maximum)
    • Gain error drift: ±25 ppm/°C (maximum)
    • Common mode rejection: 140 dB (minimum)
  • Power monitoring accuracy:
    • 0.7% full scale, –40°C to +125°C (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • High-resolution, 16-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±5 µV (maximum)
    • Offset drift: ±0.02 µV/°C (maximum)
    • Gain error: ±0.1% (maximum)
    • Gain error drift: ±25 ppm/°C (maximum)
    • Common mode rejection: 140 dB (minimum)
  • Power monitoring accuracy:
    • 0.7% full scale, –40°C to +125°C (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)

The INA239-Q1 is an ultra-precise digital power monitor with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA239-Q1 reports current, bus voltage, temperature, and power, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA239-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in A to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

The INA239-Q1 is an ultra-precise digital power monitor with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA239-Q1 reports current, bus voltage, temperature, and power, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA239-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in A to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.
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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 INA239-Q1 AEC-Q100, 85-V, 16-Bit, High-Precision Power Monitor With SPI Interface datasheet (Rev. A) PDF | HTML 2021/6/29
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
應用說明 Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 2021/9/30
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 2021/9/29
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 2021/9/28
應用說明 Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 2021/9/2
Application brief Shunt-Based Current-Sensing Solutions for BMS Applications in HEVs and EVs (Rev. B) PDF | HTML 2021/2/2
功能安全資訊 INA2x9-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2020/7/17

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

INA229_239EVM — INA229 & INA239 評估模組

此評估模組 (EVM) 是一款易於使用的平台，可評估 INA229 或 INA239 的主要功能與性能。

EVM 支援高達 10-A 的電流量測，並隨附圖形使用者介面 (GUI) 支援，可讀取及寫入裝置暫存器。

使用指南: PDF | HTML
支援產品和硬體
IDE、配置、編譯器或偵錯程式

ASC-STUDIO-INA239 — ASC studio (SysConfig) for configuring all aspects of the INA239 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA239 current sensor.
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計算工具

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

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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。

支援產品和硬體
計算工具

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

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計算工具

SBOR021 — Power Monitor Tool

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