company blog about Mingjiada Supply TI INA226AQDGSRQ1 36V 16-Bit Ultra-Precise Voltage And Power Monitor

Mingjiada Supply TI INA226AQDGSRQ1 36V 16-Bit Ultra-Precise Voltage And Power Monitor

Shenzhen Mingjiada Electronics Co., Ltd. – Genuine supplier of the TI INA226AQDGSRQ1, a 16-bit high-precision, 36V wide-voltage, I²C-interface device suitable for automotive electronics and industrial precision power management applications, with ample stock available.

I. Product Description: 16-bit ultra-high-precision automotive-grade power monitor
The INA226AQDGSRQ1 is an AEC-Q100-certified automotive-grade current shunt and power monitor launched by Texas Instruments (TI). It features 36V common-mode voltage detection, a 16-bit high-precision ADC, I²C/SMBus digital interfaces and programmable alarm functions, making it widely applicable for real-time current, bus voltage and power monitoring in automotive electronics and industrial power systems.
The INA226AQDGSRQ1 belongs to the INA226-Q1 series and incorporates a zero-drift amplifier and a 16-bit Σ-Δ ADC, enabling simultaneous detection of the voltage drop across an external shunt resistor (Shunt Voltage) and the 0–36V bus supply voltage (Bus Voltage). Configurable calibration values, conversion time and averaging frequency are set via an I²C-compatible interface. An internal multiplier directly outputs current values in amperes (A) and power values in watts (W), eliminating the need for additional calculations by the MCU.

II. Detailed Specifications
Product Model: INA226AQDGSRQ1
Operating Temperature Range: -40°C to +125°C
Supply Voltage Range: 2.7V to 5.5V single supply
Typical Supply Current: 330µA
Bus Voltage Sensing Range: 0V to 36V
Shunt Voltage Full Scale: ±81.92mV (PGA gain = 1)
ADC resolution: 16-bit
Maximum gain error: 0.1%
Maximum offset voltage (Vos): 10µV
Input bias current: 10nA (typical)
Common-mode rejection ratio (CMRR): 140dB (typical)
Differential voltage tolerance range: ±40V
Programmable I²C addresses: Up to 16
Package type: VSSOP-10 (MSOP-10), 3.00 mm × 4.90 mm
Mounting type: Surface mount (SMD/SMT)

III. Key Features (INA226AQDGSRQ1)
1. Ultra-precise measurement, automotive-grade reliability
With 16-bit ADC resolution, ultra-low 10μV offset and ±0.1% gain error, combined with 126dB CMRR, it achieves high-precision monitoring across the full temperature range; certified to AEC-Q100 Grade 1, it offers strong immunity to interference and high stability, making it suitable for the demanding environments of automotive and industrial applications.
2. 36V Wide-Voltage Bidirectional Monitoring, Suitable for Multiple Applications
With a common-mode voltage range of 0V–36V, the INA226AQDGSRQ1 supports bidirectional current monitoring on both the high-side and low-side, covering 12V/24V automotive batteries, industrial 24V power supplies and energy storage systems, without the need for additional level conversion.
3. I²C Digital Output, Simplifying System Design
The I²C interface directly outputs current, voltage and power data; the INA226AQDGSRQ1 features a built-in multiplier that automatically calculates power, reducing the load on the host MCU; 16 programmable addresses support parallel networking of multiple devices.
4. Low Power Consumption + Flexible Configuration, Suitable for Portable / Long-Duration Power Supply
Typical quiescent current of 330μA, suitable for battery-powered devices; Programmable conversion time and averaging allow for a balance between speed and accuracy; alarm functions provide real-time alerts for anomalies, enhancing system safety.
5. Compact Package, Suitable for High-Density Layouts
The MSOP-10 (VSSOP-10) package features an ultra-compact 3mm × 3mm footprint with excellent thermal performance, making it suitable for space-constrained applications such as automotive ECUs and industrial sensors.

IV. Typical Applications and Scenarios for the INA226AQDGSRQ1
1. Hybrid/Electric Vehicle (HEV/EV) Battery Management Systems (BMS)
In BMS applications, the INA226AQDGSRQ1 monitors the charging and discharging currents of the battery pack in real time. By combining this data with voltage and temperature readings, it uses the Coulomb method to accurately calculate the State of Charge (SOC), providing critical data support for the vehicle’s overall energy management.
2. On-Board Chargers (OBC) and DC-DC Converters
The INA226AQDGSRQ1 can be used for real-time monitoring of input and output current and power in OBCs and DC-DC converters, helping to achieve closed-loop control of charging power, as well as overcurrent and overpower protection, ensuring a safe and efficient charging process.
3. Body Control Module (BCM)
Within the BCM, the INA226AQDGSRQ1 monitors the current status of loads such as window motors, door lock motors and valve actuators, enabling fault diagnosis (e.g. stall detection), energy consumption monitoring and intelligent power management.
4. Advanced Driver Assistance Systems (ADAS) and Domain Controllers
Power rail monitoring for core processors, sensors and communication modules within ADAS and domain controllers enables precise energy consumption management and power supply health assessment via the INA226AQDGSRQ1.
5. Industrial Power Supplies and Communication Equipment
In applications such as industrial server power supplies, base station power supplies and solar inverters, the INA226AQDGSRQ1 can be used for real-time power monitoring on both the input and load sides, helping to achieve more efficient system-level energy management.
6. IoT and Embedded Systems
For IoT end devices requiring low-power standby monitoring, the INA226AQDGSRQ1 offers significant advantages due to its typical 330µA operating current and wide input voltage range, enabling precise detection of dynamic changes from mA-level standby currents to operating currents.

V. Mingjiada Electronics Supply Services
Shenzhen Mingjiada Electronics Co., Ltd. — a long-standing supplier of the full range of TI (Texas Instruments) components, maintains a stock of genuine INA226AQDGSRQ1 units and supports small to medium batch orders as well as BOM fulfilment services.
Furthermore, Mingjiada Electronics supplies a wide variety of electronic components, including integrated circuits (ICs), 5G chips, new energy ICs, IoT chips, Bluetooth chips and automotive chips, offering customers a one-stop procurement experience.

For further information regarding the [TI] INA226AQDGSRQ1 — a 36V, 16-bit, ultra-precision I2C current/voltage/power monitor — or to enquire about prices for other components, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.