Specifications
| Type | Description |
|---|---|
| Part Number | INA226 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Sensor |
| Package / Case | DGS VSSOP-10, 3.00 mm × 4.90 mm |
| Bus Voltage Sensing Range | 0 to 36 V; independent of supply voltage |
| Operating Supply Voltage | 2.7 to 5.5 V; single supply operation |
| Supply Current | 330 µA typical; normal operation |
| Operating Temperature Range | -40 to 125 °C; specified operating temperature range |
| Programmable I2C Addresses | 16 addresses; using A0 and A1 address pins |
| Interface | I2C-compatible and SMBus-compatible; digital output interface |
| ADC Native Resolution | 16 bits; internal ADC |
| Shunt Voltage Input Range | -81.9175 to 81.92 mV; TA=25°C, VS=3.3 V, VIN+=12 V, VSENSE=0 mV, VBUS=12 V unless otherwise noted |
| Bus Voltage Input Range | 0 to 36 V; ADC full-scale scaling is 40.96 V; do not apply more than 36 V |
| Common-Mode Rejection Ratio | 126 dB minimum, 140 dB typical; 0 V ≤ VIN+ ≤ 36 V |
| Shunt Offset Voltage | ±2.5 µV typical, ±10 µV maximum; referred-to-input |
| Shunt Offset Voltage Drift | 0.02 µV/°C typical, 0.1 µV/°C maximum; -40°C ≤ TA ≤ 125°C |
| Shunt Offset Power Supply Rejection | ±2.5 µV/V maximum; 2.7 V ≤ VS ≤ 5.5 V |
| Bus Offset Voltage | ±1.25 mV typical, ±7.5 mV maximum; referred-to-input |
| Bus Offset Voltage Drift | 10 µV/°C typical, 40 µV/°C maximum; -40°C ≤ TA ≤ 125°C |
| Bus Offset Power Supply Rejection | ±0.5 mV/V maximum; power supply variation |
| Input Bias Current | 0.1 nA typical; IIN+ and IIN- pins |
| VBUS Input Impedance | 830 kΩ typical; VBUS input |
| Input Leakage Current | 0.1 µA typical, 0.5 µA maximum; IN+ pin plus IN- pin, power-down mode |
| Shunt Voltage LSB Step Size | 2.5 µV; ADC measurement step size |
| Bus Voltage LSB Step Size | 1.25 mV; ADC measurement step size |
| Shunt Voltage Gain Error | 0.02% typical, 0.1% maximum; TA=25°C unless otherwise noted |
| Bus Voltage Gain Error | 0.02% typical, 0.1% maximum; TA=25°C unless otherwise noted |
| Gain Error Drift | 10 ppm/°C typical, 50 ppm/°C maximum; shunt and bus voltage gain error, -40°C ≤ TA ≤ 125°C |
| Differential Nonlinearity | ±0.1 LSB typical; ADC conversion |
| ADC Conversion Time | 140 µs typical, 154 µs maximum; CT bit = 000 |
| ADC Conversion Time | 8.244 ms typical, 9.068 ms maximum; CT bit = 111 |
| SMBus Timeout | 28 ms minimum, 35 ms typical; interface resets any time SCL is low for more than 28 ms |
| Digital Input Capacitance | 3 pF typical; digital input/output pins |
| Digital Input Leakage Current | 0.1 µA typical, 1 µA maximum; 0 V ≤ VSCL, VSDA, VAlert, VA0, VA1 ≤ VVS |
| High-Level Input Voltage | 0.7 × VVS minimum, 6 V maximum; digital inputs |
| Low-Level Input Voltage | -0.5 V minimum, 0.3 × VVS maximum; digital inputs |
| Low-Level Output Voltage | 0 to 0.4 V; SDA and Alert pins, IOL=3 mA |
| Digital Input Hysteresis | 500 mV typical; digital input thresholds |
| Quiescent Current | 330 µA typical, 420 µA maximum; active mode |
| Shutdown Quiescent Current | 0.5 µA typical, 2 µA maximum; power-down shutdown mode |
| Power-On Reset Threshold | 2 V typical; VPOR |
| Absolute Maximum Supply Voltage | 6 V maximum; VVS supply voltage |
| Absolute Maximum Differential Input Voltage | -40 to 40 V; VIN+ - VIN-; input pins must remain within -0.3 V to 40 V |
| Absolute Maximum Common-Mode Input Voltage | -0.3 to 40 V; (VIN+ + VIN-) / 2 |
| Absolute Maximum VBUS Voltage | -0.3 to 40 V; VBUS pin |
| Datasheet Status | request_only |
Product Overview
The device operates from a single 2.7 to 5.5 V supply and uses an internal 16-bit ADC with 2.5 µV shunt voltage LSB and 1.25 mV bus voltage LSB step sizes. Typical active current is 330 µA, with 420 µA maximum quiescent current in active mode and 0.5 µA typical shutdown current in power-down mode.
Digital communication is I2C-compatible and SMBus-compatible, with 16 programmable addresses selected through the A0 and A1 pins. The SMBus timeout function resets the interface when SCL remains low for more than 28 ms. Digital input thresholds, leakage, capacitance, output low voltage, and hysteresis are specified for interface design.
The INA226 is offered in the DGS VSSOP-10 package, 3.00 mm × 4.90 mm, and is specified for -40 to 125 °C operation. Its electrical data supports current, bus voltage, and power monitoring applications requiring low offset, defined gain error, and common-mode performance up to 36 V.
Key Features
- 0 to 36 V bus voltage sensing range
- 2.7 to 5.5 V single-supply operation
- 16-bit internal ADC for voltage measurements
- I2C-compatible and SMBus-compatible digital interface
- 16 programmable addresses using A0 and A1 pins
- 2.5 µV shunt voltage ADC step size
- 1.25 mV bus voltage ADC step size
- 330 µA typical active supply current
- 0.5 µA typical shutdown quiescent current
- -40 to 125 °C operating temperature range
Typical Applications
- I2C current monitoring
- SMBus power monitoring
- 36 V bus voltage measurement
- Shunt voltage measurement
- Low-current active monitoring systems
- Multi-address digital monitor designs
- Wide-temperature signal-chain systems
Procurement Notes
When requesting a quote for INA226, 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 analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What bus voltage range does INA226 support?
INA226 supports bus voltage sensing from 0 to 36 V independent of supply voltage. Its ADC full-scale bus scaling is 40.96 V, but the extracted datasheet facts state not to apply more than 36 V.
What digital interface is provided by INA226?
INA226 provides an I2C-compatible and SMBus-compatible digital output interface. It supports 16 programmable I2C addresses using the A0 and A1 address pins, which supports multi-device digital monitor configurations.
What supply voltage and current does INA226 require?
INA226 operates from a single 2.7 to 5.5 V supply. Typical supply current is 330 µA in normal operation, with active-mode quiescent current specified as 330 µA typical and 420 µA maximum.
What package is used for the INA226?
INA226 is specified in the DGS VSSOP-10 package. The extracted package dimensions are 3.00 mm × 4.90 mm, supporting compact assembly for current, voltage, and power monitoring circuits.
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.