The INA209 is a high-side current shunt and power monitor with an I²C interface. The INA209 monitors both shunt drop and shunt bus voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The INA209 features two separate, onboard watchdog capabilities: a warning comparator and an over-limit comparator. The warning comparator is useful for monitoring lower warning limits and incorporates a user-defined delay. The over-limit comparator assists with monitoring upper limits that could require immediate system shutdown.

The INA209 also includes an analog comparator and a programmable digital-to-analog converter (DAC) that combine to provide the fastest possible responses to current overload conditions.

The INA209 can be used together with hot swap controllers that already use a current sense resistor. The INA209 full-scale range can be selected to be either within the hot-swap controller sense limits, or wide enough to include them.

The INA209 senses across shunts on buses that can vary from 0V to 26V. The device uses a single +3V to +5.5V supply, drawing a maximum of 1.5mA of supply current. It is specified for operation from -25°C to +85°C.

• SENSES BUS VOLTAGES FROM 0V TO +26V
• REPORTS CURRENT, VOLTAGE, AND POWER; STORES PEAKS
• TRIPLE WATCHDOG LIMITS:
  • Lower Warning with Delay
  • Upper Over-limit, No Delay
  • Fast Analog Critical
• HIGH ACCURACY: 1% MAX OVER TEMP
• APPLICATIONS
  • SERVERS
  • TELECOM EQUIPMENT
  • AUTOMOTIVE
  • POWER MANAGEMENT
  • BATTERY CHARGERS
  • WELDING EQUIPMENT
  • POWER SUPPLIES
  • TEST EQUIPMENT

I2C is a trademark of NXP Semiconductors. All other trademarks are the property of their respective owners.

• Common mode voltage (Max) (V)
• 26
• Common mode voltage (Min) (V)
• 0
• Input offset (+/-) (Max) (uV)
• 100
• Input offset drift (+/-) (Typ) (uV/C)
• 0.1
• Gain (V/V)
• 1, 0.5, 0.25, 0.125
• Gain error (%)
• 0.5
• Gain error drift (+/-) (Max) (ppm/°C)
• 83
• CMRR (Min) (dB)
• 120
• Bandwidth (kHz)
• 5.5
• Supply voltage (Max) (V)
• 5.5
• Supply voltage (Min) (V)
• 3
• Iq (Max) (mA)
• 1.5
• Digital interface
• I2C, SMBus
• Features
• Alert Function, Bi-directional, Low-side Capable, Programmable Gain
• Resolution (Bits)
• 12
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 125

INA209的完整型号有：INA209AIPW、INA209AIPWR，以下是这些产品的关键参数及官网采购报价：

INA209AIPW，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：90个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网INA209AIPW的批量USD价格：2.206（1000+）

INA209AIPWR，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网INA209AIPWR的批量USD价格：1.838（1000+）

INA209EVM — INA209 评估模块

The INA209EVM key hardware consists of two boards, INA209 Test Board and USB DIG Platform. The INA209 Test Board contains the INA209, terminal strips for external connections, and several jumpers for device configuration. The USB DIG Platform contains an 8052 microcontroller with a built in USB (...)

INA209EVM Source Code (Rev. F)

Linux 驱动程序支持 INA209 电流/功率监测计。Linux 驱动程序支持通过 I2C 总线和接口与硬件监测子系统进行通信。
Linux 主线状态

在 Linux 主线中提供：是
可通过 git.ti.com 获取：不适用

支持的器件：

• ina209

Linux 源文件

与该器件关联的文件为：

drivers/hwmon/ina209.c

Documentation/devicetree/bindings/i2c/ina209.txt

linux/platform_data/ina2xx.h

Documentation/hwmon/ina209

源文件

drivers/hwmon/ina209.c

Linux (...)

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