INA230
Current, Voltage and Power MonitorThe INA230 is a current, voltage and power monitor from Texas Instruments. View the full INA230 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official INA230 datasheet (PDF) — the source this page was extracted from.
INA230 Key Specifications
| Parameter | Value |
|---|---|
| Interface | I2C/SMBus |
| I2C Timeout | 28 ms |
| Alert Output | Open-drain, programmable threshold |
| I2C Addresses | 16 programmable |
| ADC Resolution | 16-bit |
| Supply Voltage | 2.7 V to 5.5 V |
| Gain Error (Max) | 0.3% |
| Package Body Size | 3.00 mm x 3.00 mm |
| Offset Voltage (Max) | 25 μV |
| Supply Current (Typ) | 330 μA |
| Operating Temperature | -40°C to +125°C |
| Bus Voltage Sensing Range | 0 V to 36 V |
INA230 Overview
Part: INA230 (INA230AIRGTR) — Texas Instruments
Type: I²C Digital Current, Voltage and Power Monitor
Description: 36 V common-mode, 16-bit I²C current-shunt and power monitor with alert, 2.7–5.5 V supply, ±0.3% max gain error and ±25 μV max shunt offset.
Operating Conditions:
- Supply voltage (VS): 2.7–5.5 V
- Operating temperature: -40 to +125 °C
- Common-mode input range: 0–36 V
- I²C clock: up to 400 kHz (fast mode), up to 3.4 MHz (high-speed mode)
Absolute Maximum Ratings:
- Max supply voltage: 6 V
- Differential input (VIN+ − VIN-): ±40 V
- Common-mode input (VIN+, VIN-): GND − 0.3 V to 40 V
- Input current into any pin: 5 mA
- Open-drain output current (SDA, ALERT): 10 mA
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
Key Specs:
- Shunt voltage input range: -81.92 to +81.9175 mV
- Shunt offset voltage: ±25 μV max (VCM = 12 V); drift ±0.1 μV/°C max
- Shunt and bus gain error: ±0.3% max; drift 50 ppm/°C max
- Bus offset voltage: ±15 mV max
- ADC resolution: 16 bits; LSB 2.5 μV (shunt), 1.25 mV (bus)
- Conversion time: 140 μs to 8.244 ms typ (CT setting dependent)
- Quiescent current: 330 μA typ, 420 μA max (VS = 3.3 V); shutdown 0.5 μA typ, 2 μA max
- CMRR: 120 dB min (VCM = 0–36 V)
- Bus input impedance: 830 kΩ typ
Features:
- Bus voltage sensing from 0 to 36 V
- High- or low-side sensing
- Current, voltage and power reporting
- Configurable averaging options
- Programmable alert threshold
- 16 programmable I²C addresses
- I²C- and SMBus-compatible interface
Applications:
- Rack servers
- Wireless infrastructure
- High performance computing
- Power management
- Battery cell monitors and balancers
- Power supplies
- Test equipment
Package:
- RGT (VQFN, 16-pin), 3.00 mm × 3.00 mm
- DGS (VSSOP, 10-pin), 3.00 mm × 4.90 mm
INA230 Features
- Bus voltage sensing from 0V to 36V
- High- or low-side sensing
- Current, voltage, and power reporting
- High accuracy:
- -0.3% gain error (maximum)
- -25μV offset (maximum)
- Configurable averaging options
- Programmable alert threshold
- Power supply operation: 2.7V to 5.5V
- Packages:
- -16-pin RGT (VQFN)
- -10-pin DGS (VSSOP)
INA230 Applications
INA230 Pin Configuration
Figure 5-1. RGT Package 16-Pin VQFN (Top View)
Table 4-1. Related Products
Figure 5-2. DGS Package 10-Pin VSSOP (Top View)
Table 5-1. Pin Functions
| PIN - NAME | PIN - VQFN | PIN - VSSOP | TYPE | DESCRIPTION |
|---|---|---|---|---|
| A0 | 2 | 2 | Digital input | Address pin. Connect to GND, SCL, SDA, or V S . Table 7-2 shows pin settings and corresponding addresses. |
| A1 | 1 | 1 | Digital input | Address pin. Connect to GND, SCL, SDA, or V S . Table 7-2 shows pin settings and corresponding addresses. |
| ALERT | 3 | 3 | Digital output | Multi-functional alert, open-drain output. |
| GND | 10 | 7 | Analog | Ground |
| NC | 6, 7, 8, 14, 15, 16 | - | - | No internal connection |
| SCL | 5 | 5 | Digital input | Serial bus clock line, open-drain input. |
| SDA | 4 | 4 | Digital input/output | Serial bus data line, open-drain input/output. |
| VBUS | 11 | 8 | Analog input | Bus voltage input |
| IN- | 12 | 9 | Analog input | Negative differential shunt voltage input. For high-side applications, connect to load side of sense resistor. For low-side applications, connect to ground side of sense resistor. |
| IN+ | 13 | 10 | Analog input | Positive differential shunt voltage input. For high-side applications, connect to bus voltage side of sense resistor. For low-side applications, connect to load side of sense resistor. |
| V S | 9 | 6 | Analog | Power supply, 2.7 V to 5.5 V. |
| Thermal Pad | - | PAD | - | This pad can be connected to ground or left floating. |
INA230 Electrical Characteristics
at T A = 25°C, VS = 3.3 V, V SENSE = V IN+ - V IN- = 0 mV, VIN- = VBUS = 12V (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| INPUT | INPUT | INPUT | INPUT | INPUT | INPUT | INPUT |
| Shunt voltage input range | -81.92 | 81.9175 | mV | |||
| CMRR | Common-mode rejection | V CM = 0 V to 36 V, T A = -40°C to 125°C | 120 | 140 | dB | |
| V os | Shunt offset voltage | V CM = 12 V | -9.8 | ±25 | μV | |
| dV os /dT | Shunt offset voltage drift | T A = -40°C to +125°C | ±0.05 | ±0.1 | μV/°C | |
| PSRR SHUNT | Power supply rejection ratio (Current measurements) | -3.0 | μV/V | |||
| V os_b | Bus offset Voltage | +2.3 | ±15 | mV | ||
| dV os_b /dT | Bus offset voltage drift | T A = -40°C to +125°C | ±40 | μV/°C | ||
| PSRR BUS | Power supply rejection ratio (Voltage measurements) | 0.4 | mV/V | |||
| Z BUS | BUS input impedance | 830 | kΩ | |||
| I | Input bias current (DGS Package) | IN+, IN-, Current measurement mode | 10 | μA | ||
| B | Input bias current (RGT Package) | IN+, IN-, Current measurement mode | 0.1 | nA | ||
| I B_SHDWN | Input Leakage | IN+, IN-, Shutdown Mode | 0.1 | 0.5 | μA | |
| DC ACCURACY | DC ACCURACY | DC ACCURACY | DC ACCURACY | DC ACCURACY | DC ACCURACY | DC ACCURACY |
| ADC Resolution | T A = -40°C to 125°C | 16 | Bits | |||
| 1 LSB step size | Shunt Voltage | 2.5 | μV | |||
| 1 LSB step size | Bus Voltage | 1.25 | mV | |||
| CT bit = 000 | 140 | 154 | μs | |||
| ADC Conversion-time | CT bit = 001 | 204 | 224 | μs | ||
| ADC Conversion-time | CT bit = 010 | 332 | 365 | μs | ||
| ADC Conversion-time | CT bit = 011 | 588 | 646 | μs | ||
| ADC Conversion-time | CT bit = 100 | 1.100 | 1.21 | ms | ||
| ADC Conversion-time | CT bit = 101 | 2.116 | 2.328 | ms | ||
| CT bit = 110 | 4.156 | 4.572 | ms | |||
| CT bit = 111 | 8.244 | 9.068 | ms | |||
| G SERR | Shunt voltage gain error | ±0.010 | ±0.3 | % | ||
| G S_DRFT | Shunt voltage gain error drift | T A = -40°C to +125°C | 10 | 50 | ppm/°C | |
| G BERR | Bus voltage gain error | ±0.010 | ±0.3 | % | ||
| G B_DRFT | Bus voltage gain error drift | T A = -40°C to +125°C | 10 | 50 | ppm/°C | |
| DNL | Differential Non-Linearity | ±0.1 | LSB | |||
| POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY |
| I Q | Quiescent current | V SENSE = 0 mV | 330 | 420 | μA | |
| Shutdown | 0.5 | 2 | μA |
INA230 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V s | Supply Voltage | 6 | V | |
| V IN+ , V IN- | Differential (V IN+ ) - (V IN- ) | -40 | 40 | V |
| V IN+ , V IN- | Common - mode | GND - 0.3 | 40 | V |
| V IO | SDA, ALERT, A0 | GND - 0.3 | 6 | V |
| V IO | SCL | GND - 0.3 | V S + 0.3 | V |
| Input current into any pin | 5 | mA | ||
| Open-drain digital output current (SDA, ALERT) | 10 | mA | ||
| T A | Operating Temperature | -55 | 150 | °C |
| T J | Junction temperature | 150 | °C | |
| T stg | Storage temperature | -65 | 150 | °C |
INA230 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V CM | Common-mode input range | 0 | 36 | V | |
| V S | Operating supply range | 2.7 | 5.5 | V | |
| T A | Ambient temperature | -40 | 125 | °C |
INA230 Thermal Information
| THERMAL METRIC (1) | THERMAL METRIC (1) | INA230 - DGS (VSSOP) - 10 PINS | INA230 - RGT(QFN) - 16 PINS | UNIT |
|---|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 162.8 | 54.5 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 58.6 | 65.7 | °C/W |
| R θJB | Junction-to-board thermal resistance | 83.9 | 29.9 | °C/W |
| Ψ JT | Junction-to-top characterization parameter | 7.6 | 3.8 | °C/W |
| Y JB | Junction-to-board characterization parameter | 82.4 | 29.9 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | n/a | 14.0 | °C/W |
INA230 Typical Application
The INA230 measures the voltage developed across a current-sensing resistor (RSHUNT) when current passes through it. The device also measures the bus supply voltage and can calculate power when calibrated. It comes with alert capability where the alert pin can be programmed to respond to a user-defined event or to a conversion ready notification. This design illustrates the ability of the alert pin to respond to a set threshold.
INA230 Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| INA230 | RGT (VQFN, 16) | 3.00mm × 3.00mm |
| INA230 | DGS (VSSOP, 10) | 3.00mm × 4.90mm |
- (1) For more information, see Section 11.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
GND
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| INA230AIDGSR | Texas Instruments | VSSOP-10 |
| INA230AIRGTR | Texas Instruments | VQFN-16-EP(3x3) |
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- ACS72981ELR – Allegro MicroSystems, Hall-Effect Current Sensor IC
- ACS72981KLR – Allegro MicroSystems, Hall-Effect Linear Current Sensor
- ACS72981LLR – Allegro MicroSystems, Hall-Effect Linear Current Sensor IC
All Current Sensors datasheetsAll Texas Instruments datasheets (2,437)
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