【High-Precision Bidirectional Current Monitoring】 10-bit resolution; ±3.2A bidirectional current range; 1% accuracy over full temperature range; zero drift architecture ensures stable readings in varying conditions
【Integrated Power Measurement Solution】 16-bit ADC; 3.2mV voltage resolution; supports bus voltage up to 26V; built-in PGA and calibration register simplify system design
【Low-Power I2C Interface Module】 Operating current ≤1mA; standby current <1µA; compatible with 3.3V and 5V systems; I²C/SMBus interface with 16 programmable addresses
【Easy Integration for Embedded Systems】 No external calculation circuit required; supports for Arduino and for Raspberry Pi; 4.7kΩ pull-up resistors for SDA/SCL lines; shielded wiring recommended for noise reduction
【Robust Design for Industrial Applications】 -40°C to +125°C operating range; 2.1kVRMS isolation; software calibration for offset correction; not suitable for high-voltage (>26V) systems

Product Parameters

Model: INA219BIDR ( TI Chip, SOT-23-8 Package)

Current Detection Range: ±3.2A (Bidirectional, Supports AC/DC)

Supply Voltage: 3.0V-5.5V DC (Compatible with 3.3V/5V Systems)

Bus Voltage Range: 0V-26V (High-Side Detection, Isolation Withstand Voltage 2.1kVRMS)

Accuracy: 1% (Full Temperature Range ±1.5%, Zero-Drift Architecture)

Resolution: Current: 100µA/LSB, Voltage: 4mV/LSB (16-bit ADC)

Communication: I²C/SMBus (100kHz/400kHz, 16 Programmable Addresses)

Power Consumption: Operating Current ≤1mA, Standby

Temperature Range: -40°C to +125°C (Reliable, AEC-Q100 Compliant) .

Key Features

Pin Functions

VCC (Pin 8): Power supply (3.0V-5.5V). Use 1µF ceramic + 10µF electrolytic capacitor for decoupling .

GND (Pin 5): System ground. Implement single-point star grounding with impedance ≤0.1Ω .

IN+ (Pin 1): Current sense positive. Connect to circuit positive pole with wire diameter ≥0.5mm .

IN- (Pin 2): Current sense negative. Ensure parallel and equidistant wiring with IN+ (deviation

SDA/SCL (Pins 6-7): I²C data/clock lines. Requires 4.7kΩ pull-up resistors to VCC .

A0/A1 (Pins 3-4): Address configuration (default address 0x40) .

FAQ

1.
Q: Zero current reading drifts (±10mA)?

A: Ensure IN+/IN- traces are equal length (deviation

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