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INA4235

現行

具有 I²C 介面的四通道、16 位元、超高精密度、電流、電壓、電源與能量監控器

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產品規格表

INA4235

現行
產品規格表 立即訂購

產品詳細資料

Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 10 Input offset drift (±) (max) (µV/°C) 0.025 Voltage gain (V/V) 1 CMRR (min) (dB) 130 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.5 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 25 Features Alert Function, Bidirectional, Integrated Power Accumulator, Intergrated Power Monitor, Low-side Capable Number of channels 4 Power measurement accuracy (%) 0.8 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 10 Input offset drift (±) (max) (µV/°C) 0.025 Voltage gain (V/V) 1 CMRR (min) (dB) 130 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.5 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 25 Features Alert Function, Bidirectional, Integrated Power Accumulator, Intergrated Power Monitor, Low-side Capable Number of channels 4 Power measurement accuracy (%) 0.8 Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YBJ) 16 2.56 mm² 1.6 x 1.6
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage, power, and energy
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 48V
  • Current monitoring accuracy:
    • 16-bit ADC resolution
    • 0.1% gain error (maximum)
    • 10µV offset (maximum)
  • Power monitoring accuracy:
    • 0.2% full scale (maximum)
  • Energy monitoring accuracy:
    • 0.7% full scale (maximum)
  • Low input bias currents: 5nA (maximum)
  • Low disable current: 50nA (maximum)
  • Configurable averaging options
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • 16-pin selectable addresses
  • DSBGA-16 Package (1.5mm × 1.5mm)
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage, power, and energy
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 48V
  • Current monitoring accuracy:
    • 16-bit ADC resolution
    • 0.1% gain error (maximum)
    • 10µV offset (maximum)
  • Power monitoring accuracy:
    • 0.2% full scale (maximum)
  • Energy monitoring accuracy:
    • 0.7% full scale (maximum)
  • Low input bias currents: 5nA (maximum)
  • Low disable current: 50nA (maximum)
  • Configurable averaging options
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • 16-pin selectable addresses
  • DSBGA-16 Package (1.5mm × 1.5mm)

The INA4235 device is a quad channel 16-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with digital bus voltages from 1.2V to 5V. The device monitors the voltage across an external sense resistor and reports values for shunt voltage, bus voltage, current, power, and energy for each channel.

The INA4235 features programmable ADC conversion times and averaging that is common for all channels. Each channel has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes, power in watts, and energy in joules. Each channel monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions, as well as on overvoltage and undervoltage conditions.High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA4235 senses current on common-mode bus voltages that can vary from –0.3V to 48V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 400µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.5µA and can be fully disabled using the enable pin to achieve an supply current less than 50nA. The device is specified over the operating temperature range between –40°C and 125°C and features up to 16 programmable addresses.

The INA4235 device is a quad channel 16-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with digital bus voltages from 1.2V to 5V. The device monitors the voltage across an external sense resistor and reports values for shunt voltage, bus voltage, current, power, and energy for each channel.

The INA4235 features programmable ADC conversion times and averaging that is common for all channels. Each channel has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes, power in watts, and energy in joules. Each channel monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions, as well as on overvoltage and undervoltage conditions.High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA4235 senses current on common-mode bus voltages that can vary from –0.3V to 48V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 400µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.5µA and can be fully disabled using the enable pin to achieve an supply current less than 50nA. The device is specified over the operating temperature range between –40°C and 125°C and features up to 16 programmable addresses.
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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet INA4235 48V, Quad Channel, 16-Bit, Ultra - Precise, Current, Voltage, Power, and Energy Monitor With an I2C In datasheet 2024年 5月 30日
EVM User's guide INA423x Evaluation Module User's Guide (Rev. A) PDF | HTML 2026年 2月 13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

設計與開發

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開發板

INA423XEVM — INA4230 和 INA4235 評估模組

INA423X 評估模組 (EVM) 是可評估 INA4230 和 INA4235 主要功能與性能的平台。EVM 支援每通道高達 10A 的電流量測，並隨附 GUI 以支援讀取及寫入裝置暫存器。

使用指南: PDF | HTML
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INA423X-LINUX-DRIVER — Linux Driver for the INA4235 and INA4230.

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INA423X-WINDOWS-10-11-E3-DRIVER — INA4230 and INA4235 Energy Estimation Engine (E3) Driver for Windows 10 and 11.

Energy Estimation Engine (E3) is a software framework that tracks and attributes power consumption to specific hardware components and software processes. It leverages the EMI (Energy Metering Interface) to report the energy consumption of various power rails.
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IDE、配置、編譯器或偵錯程式

ASC-STUDIO-INA4235 — ASC Studio (SysConfig) for configuring all aspects of the INA4235 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA4235 current sensor.
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E3-CONSOLE-APPLICATION-SW — Energy Estimation Engine (E3) driver evaluation software

The E3 Console application uses the Energy Meter Interface (EMI) IOCTLs defined by Microsoft to extract power rail data and measurement. This application can be used to evaluate TI's E3 drivers.
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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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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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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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DSBGA (YBJ) 16 Ultra Librarian
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