Specifications
| Type | Description |
|---|---|
| Part Number | INA219 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | SOIC-8 3.91 mm x 4.90 mm; SOT-23-8 1.63 mm x 2.90 mm |
| Bus Voltage Sense Range | 0 to 26 V |
| Supply Voltage | 3 to 5.5 V |
| Maximum Supply Current | 1 mA max |
| Operating Temperature Range | -40 to 125 °C |
| Programmable I2C Addresses | 16 addresses |
| Accuracy | 0.5% max |
| Differential Analog Input Absolute Maximum | -26 to 26 V |
| Analog Input Common-Mode Absolute Maximum | -0.3 to 26 V |
| Junction Temperature Absolute Maximum | 150 °C |
| Storage Temperature Range | -65 to 150 °C |
| ESD Rating HBM | ±4000 V |
| ESD Rating CDM | ±750 V |
| ESD Rating Machine Model | ±200 V |
| Recommended Common-Mode Voltage | 12 V nom |
| Recommended Supply Voltage | 3.3 V nom |
| Recommended Ambient Temperature | -25 to 85 °C |
| Thermal Resistance Junction-to-Ambient | 111.3 °C/W SOIC-8; 135.4 °C/W SOT-23-8 |
| Shunt Full-Scale Voltage Range | ±40 mV |
| Shunt Full-Scale Voltage Range | ±80 mV |
| Shunt Full-Scale Voltage Range | ±160 mV |
| Shunt Full-Scale Voltage Range | ±320 mV |
| Bus Voltage ADC Range | 0 to 32 V |
| Bus Voltage ADC Range | 0 to 16 V |
| Common-Mode Rejection Ratio | 100 dB min, 120 dB typ |
| Offset Voltage RTI | ±10 µV typ, ±50 µV max |
| Offset Voltage Drift | 0.1 µV/°C typ |
| Power Supply Rejection Ratio | 10 µV/V typ |
| Current Sense Gain Error | ±40 m% typ |
| Current Sense Gain Error Drift | 1 m%/°C typ |
| ADC Basic Resolution | 12 bits |
| Shunt Voltage LSB Step Size | 10 µV |
| Bus Voltage LSB Step Size | 4 mV |
| Current Measurement Error | ±0.2% typ, ±0.3% max |
| Bus Voltage Measurement Error | ±0.2% typ, ±0.5% max |
| ADC Conversion Time | 532 µs typ, 586 µs max |
| ADC Conversion Time | 276 µs typ, 304 µs max |
| ADC Conversion Time | 148 µs typ, 163 µs max |
| ADC Conversion Time | 84 µs typ, 93 µs max |
| SMBus Timeout | 28 ms min, 35 ms typ |
| Digital Input Capacitance | 3 pF typ |
| Digital Input Logic High | 0.7 x VS min, 6 V max |
| Digital Input Logic Low | -0.3 V min, 0.3 x VS max |
| Open-Drain Output Logic Low | 0.15 V typ, 0.4 V max |
| Quiescent Current | 0.7 mA typ, 1 mA max |
| Power-Down Quiescent Current | 6 µA typ, 15 µA max |
| Power-On Reset Threshold | 2 V typ |
| I2C SCL Frequency | 0.001 to 0.4 MHz fast mode; 0.001 to 2.56 MHz high-speed mode |
| Datasheet Status | request_only |
Product Overview
The INA219 is a Texas Instruments Power_Management IC for bidirectional current and power monitoring. It measures shunt voltage and bus voltage, with a bus voltage sense range of 0 to 26 V and selectable bus-voltage ADC ranges of 0 to 16 V or 0 to 32 V, with the 32 V setting limited by the 26 V maximum applied bus voltage condition.
The device operates from a 3 to 5.5 V supply and has 0.7 mA typical, 1 mA maximum quiescent current during operation. Power-down quiescent current is 6 µA typical and 15 µA maximum. The digital interface is I2C- or SMBus-compatible, supports 16 programmable addresses, and includes SMBus timeout behavior when SCL or SDA remains low for more than 28 ms.
Analog measurement parameters include 12-bit basic ADC resolution, 10 µV shunt-voltage LSB size, 4 mV bus-voltage LSB size, and shunt full-scale selections of ±40 mV, ±80 mV, ±160 mV, and ±320 mV. Package options are SOIC-8 and SOT-23-8, with junction-to-ambient thermal resistance of 111.3 °C/W and 135.4 °C/W respectively.
Key Features
- 0 to 26 V bus voltage sense range
- 3 to 5.5 V operating supply range
- 1 mA maximum active supply current
- -40 to 125 °C operating temperature range
- 16 programmable I2C-compatible addresses
- 0.5% maximum accuracy over temperature for INA219B
- 12-bit ADC basic resolution for DC accuracy
- 10 µV shunt voltage LSB step size
- 4 mV bus voltage LSB step size
- SMBus timeout after SCL or SDA remains low
Typical Applications
- Shunt-based current monitoring
- Bidirectional current measurement
- Bus voltage monitoring
- I2C power telemetry
- SMBus power telemetry
- Power rail current sensing
- Low-current power-down monitoring
Procurement Notes
When requesting a quote for INA219, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What bus voltage range can the INA219 sense?
The INA219 senses across shunts on buses from 0 to 26 V. Its ADC also has selectable bus-voltage ranges of 0 to 16 V and 0 to 32 V, but the 32 V range is for ADC scaling and must not exceed the 26 V applied limit.
What supply voltage does the INA219 require?
The operating supply range is 3 to 5.5 V. Texas Instruments also lists 3.3 V nominal as a recommended operating supply condition, with a typical power-on reset threshold of 2 V.
Which interface and address options are supported?
The INA219 uses an I2C- or SMBus-compatible interface with 16 programmable addresses. Bus timing supports 0.001 to 0.4 MHz fast mode and 0.001 to 2.56 MHz high-speed mode, with SMBus timeout behavior after SCL or SDA stays low.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.