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INA219BIDCN

Bidirectional current/power monitor, I2C, 0-26V CMV, 0.1% gain error, SOT-23-8

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Manufacturer Part：

INA219BIDCN

Package：

SOT-23-8 (2.9 x 2.8 x 1.45mm)

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Description

Product Overview

The INA219BIDCN is a bidirectional current/power monitor with I2C interface from Texas Instruments featuring 0.1% gain error, 16 programmable addresses, and 12-bit ADC in a tiny SOT-23-8 package.

Key Specifications

Supply Voltage 3V to 5.5V
Common-Mode Voltage 0V to 26V
Gain Error 0.1% (max)
Offset Voltage 100 µV (max)
ADC Resolution 12-bit
Interface I2C (up to 1MHz fast mode plus)
I2C Addresses 16 programmable via A0/A1 pins
Shunt Voltage Range ±320mV (PGA gain = /1)
Operating Current 1mA maximum
Operating Temperature -40°C to +125°C
Package SOT-23-8

Features

  • High-precision 0.1% gain error over temperature
  • Wide common-mode voltage range: 0V to 26V
  • 16 programmable I2C addresses for multi-sensor systems
  • Bidirectional current measurement capability
  • 12-bit ADC with programmable resolution and conversion time
  • Internal multiplier for direct power calculation
  • Alert pin with programmable over-limit threshold
  • Low quiescent current: 1mA max

Applications

  • Battery chargers and fuel gauges
  • Power supply monitoring
  • Server and telecom power management
  • Motor control current sensing
  • Solar and renewable energy systems

The INA219BIDCN is a high-side bidirectional current shunt and power monitor from Texas Instruments with an I2C interface. It features 0.1% gain error accuracy, a wide 0V to 26V common-mode voltage range, and a 12-bit ADC with programmable resolution (9 to 12 bits). The device measures shunt voltage, bus voltage, and internally calculates power, providing all data via the I2C interface. The 16 programmable I2C addresses allow up to 16 devices on a single bus. An alert pin with programmable threshold provides hardware interrupt capability for over-current or over-power conditions. The B-grade version offers improved 0.1% gain error specification over the A-grade.

The INA219BIDCN operates as a delta-sigma ADC-based current and power monitor. The shunt voltage across the external sense resistor is amplified by the programmable gain amplifier (PGA) with gains of /1, /2, /4, or /8, providing full-scale ranges of ±320mV, ±160mV, ±80mV, or ±40mV respectively. The ADC converts the amplified shunt voltage and the bus voltage using a delta-sigma architecture with programmable resolution and conversion time (9 to 12 bits, 84µs to 68.1ms). An internal multiplier circuit automatically computes the power value by multiplying the shunt current (derived from shunt voltage and programmed calibration value) by the bus voltage. The calibration register allows the user to set the current LSB to any desired value, enabling direct readout in amperes and watts. The I2C interface provides access to all measurement registers, configuration, and alert threshold settings. The alert comparator monitors selected parameters and asserts the ALERT pin when thresholds are exceeded.

Pin Name Type Description
1 IN+ Analog Input Positive shunt voltage input (connect to load side)
2 IN- Analog Input Negative shunt voltage input (connect to supply side)
3 GND Power Ground
4 SDA I/O I2C data (open drain)
5 SCL Input I2C clock
6 A0 Input I2C address select bit 0 (connect to GND, VS, SDA, or SCL)
7 A1 Input I2C address select bit 1 (connect to GND, VS, SDA, or SCL)
8 VS Power Supply voltage (3V-5.5V)
  • Battery Management: Bidirectional current measurement with 0.1% accuracy tracks charge and discharge cycles in battery packs
  • Server Power Monitoring: 0-26V CMV range covers 12V and 5V rails; 16 addresses enable multi-rail monitoring
  • Solar Energy: Power calculation eliminates need for external MCU multiplication; alert pin flags over-current
  • Motor Control: Bidirectional capability measures both drive and regenerative currents in H-bridge motor drivers
  • Test Equipment: Programmable gain and calibration enable flexible current ranges from milliamps to amps
Model Manufacturer Key Difference Package Specs
INA219AIDCN TI A-grade, 1% gain error, lower cost – –
INA226 TI Higher precision (0.1%), 16-bit, alert pin, MSOP-10 – –
INA260 TI Integrated 2mΩ shunt, no external resistor needed – –
MAX34417 ADI/Maxim Quad channel, 12-bit, I2C – –
PAC1710-1-AIA Microchip Single-supply, 0-40V, I2C – –
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

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If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

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5. Sourcing for Special Components

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6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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