INA219

Part: INA219

Type: Zerø-Drift, Bidirectional Current/Power Monitor With I²C Interface

Key Specs:

• Bus Voltage Range: 0 to 26 V
• Supply Voltage: 3 to 5.5 V
• Supply Current: 1 mA (maximum)
• Operating Temperature: -40°C to 125°C
• Accuracy (INA219B): 0.5% (Maximum) Over Temperature

Features:

• Senses Bus Voltages from 0 to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over Temperature (INA219B)
• Filtering Options
• Calibration Registers
• SOT23-8 and SOIC-8 Packages

Applications:

• Servers
• Telecom Equipment
• Notebook Computers
• Power Management
• Battery Chargers
• Welding Equipment
• Power Supplies
• Test Equipment

Package:

• SOIC (8): 3.91 mm × 4.90 mm
• SOT-23 (8): 1.63 mm × 2.90 mm

• Senses Bus Voltages from 0 to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over Temperature (INA219B)
• Filtering Options
• Calibration Registers
• SOT23-8 and SOIC-8 Packages

• Servers
• Telecom Equipment
• Notebook Computers
• Power Management
• Battery Chargers
• Welding Equipment
• Power Supplies
• Test Equipment

Pin Functions

Copyright © 2008–2015, Texas Instruments Incorporated

| | $25^{\circ}$ C, $V_S = 3.3$ V, $V_{IN+} = 12$ V, $V_{SHUI}$ | | INA219A | | | INA219B | |--------------------|--------------------------------------------------------------------|------------------------------|-----------------------|-----------|-----------------------|-----------------------|-----------|-----------------------|------------| | | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | MIN | TYP | MAX | UNIT | | INPUT | | | | PGA = /1 | 0 | | ±40 | 0 | | ±40 | mV | | | Full-scale current sense (input) voltage | PGA = /2 | 0 | | ±80 | 0 | | ±80 | mV | | V _SHUNT | range | PGA = /4 | 0 | | ±160 | 0 | | ±160 | mV | | | | PGA = /8 | 0 | | ±320 | 0 | | ±320 | mV | | | - (2) | BRNG = 1 | 0 | | 32 | 0 | | 32 | V | | | Bus voltage (input voltage) range (2) | BRNG = 0 | 0 | | 16 | 0 | | 16 | V | | CMRR | Common-mode rejection | V _IN+ = 0 to 26 V | 100 | 120 | | 100 | 120 | | dB | | | | PGA = /1 | | ±10 | ±100 | | ±10 | ±50 ⁽⁴⁾ | μV | | | O" : " DTI(3) | PGA = /2 | | ±20 | ±125 | | ±20 | ±75 ⁽⁴⁾ | μV | | /os | Offset voltage, RTI ⁽³⁾ | PGA = /4 | | ±30 | ±150 | | ±30 | ±75 ⁽⁴⁾ | μV | | | | PGA = /8 | | ±40 | ±200 | | ±40 | ±100 ⁽⁴⁾ | μV | | | vs Temperature | $T_A = -25$ °C to 85°C | | 0.1 | | | 0.1 | | μV/°( | | PSRR | vs Power Supply | V _S = 3 to 5.5 V | | 10 | | | 10 | | μV/\ | | | Current sense gain error | | | ±40 | | | ±40 | | m% | | | vs Temperature | $T_A = -25$ °C to 85°C | | 1 | | | 1 | | m%/° | | | IN+ pin input bias current | Active mode | | 20 | | | 20 | | μA | | | IN- pin input bias current V _IN- pin input impedance | Active mode | | 20 320 | | | 20 320 | | μΑ
kΩ | | | IN+ pin input leakage (5) | Power-down mode | | 0.1 | ±0.5 | | 0.1 | ±0.5 | μA | | | IN- pin input leakage (5) | Power-down mode | | 0.1 | ±0.5 | | 0.1 | ±0.5 | μA | | DC ACC | CURACY | | | ADC basic resolution | | | 12 | | | 12 | | bits | | | Shunt voltage, 1 LSB step size | | | 10 | | | 10 | | μV | | | Bus voltage, 1 LSB step size | | | 4 | | | 4 | | mV | | | Current measurement error | | | ±0.2% | ±0.5% | | ±0.2% | ±0.3%(
4) | | | over Temperature | $T_A = -25$ °C to 85°C | | | ±1% | | | ±0.5% ⁽ 4) | | | Bus voltage measurement error | | | ±0.2% | ±0.5% | | ±0.2% | ±0.5% | | | over Temperature | $T_A = -25$ °C to 85°C | | | ±1% | | | ±1% | | | Differential nonlinearity | | | ±0.1 | | | ±0.1 | | LSE | | ADC TIN | MING | | | | 12 bit | | 532 | 586 | | 532 | 586 | μs | | | ADC conversion time | 11 bit | | 276 | 304 | | 276 | 304 | μs | | | ADO conversion time | 10 bit | | 148 | 163 | | 148 | 163 | μs | | | | 9 bit | | 84 | 93 | | 84 | 93 | μs | | | Minimum convert input low time | | 4 | | | 4 | | | μs | | SMBus | | | | | imeout ⁽⁶⁾ | | | 28 | 35 | | 28 | 35 | ms | | DIGITAL | INPUTS (SDA as Input, SCL, A0, A1) | | | Input capacitance | | | 3 | | | 3 | | pF | | | Leakage input current | $0 \le V_{IN} \le V_{S}$ | | 0.1 | 1 | | 0.1 | 1 | μΑ | | | V _IH input logic level | | 0.7 (V _S ) | | 6 | 0.7 (V _S ) | | 6 | V | | | V _IL input logic level | | -0.3 | | 0.3 (V _S ) | -0.3 | | 0.3 (V _S ) | V |

⁽¹⁾ BRNG is bit 13 of the Configuration register 00h in Figure 19.

⁽²⁾ This parameter only expresses the full-scale range of the ADC scaling. In no event should more than 26 V be applied to this device.

⁽³⁾ Referred-to-input (RTI)

Indicates improved specifications of the INA219B.

⁽⁵⁾ Input leakage is positive (current flowing into the pin) for the conditions shown at the top of the table. Negative leakage currents can occur under different input conditions.

SMBus timeout in the INA219 resets the interface any time SCL or SDA is low for over 28 ms.

over operating free-air temperature range (unless otherwise noted)(1)

| | | MIN | MAX | UNIT | |----------------------------|-------------------------------------|-----------|----------|------|--|--|--| | VS | Supply voltage | | 6 | V | | Analog Inputs | (2)
Differential (VIN+ – VIN–) | –26 | 26 | V | | IN+, IN– | Common-mode(VIN+ + VIN–) / 2 | -0.3 | 26 | V | | SDA | | GND – 0.3 | 6 | V | | SCL | | GND – 0.3 | VS + 0.3 | V | | Input current into any pin | | | 5 | mA | | | Open-drain digital output current | | 10 | mA | | | Operating temperature
–40
125 | | TJ | Junction temperature | | 150 | °C | | Tstg | Storage temperature | –65 | 150 | °C | ⁽¹⁾ Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

over operating free-air temperature range (unless otherwise noted)

| | | | INA219 | |-----------|----------------------------------------------|----------|-----------|------| | | THERMAL METRIC(1) | D (SOIC) | DCN (SOT) | UNIT | | | | 8 PINS | 8 PINS | | RθJA | Junction-to-ambient thermal resistance | 111.3 | 135.4 | °C/W | | RθJC(top) | Junction-to-case (top) thermal resistance | 55.9 | 68.1 | °C/W | | RθJB | Junction-to-board thermal resistance | 52 | 48.9 | °C/W | | ψJT | Junction-to-top characterization parameter | 10.7 | 9.9 | °C/W | | ψJB | Junction-to-board characterization parameter | 51.5 | 48.4 | °C/W | | RθJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A | °C/W |

⁽¹⁾ For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

Product Folder Links: INA219

⁽²⁾ VIN+ and VIN– may have a differential voltage of –26 to 26 V; however, the voltage at these pins must not exceed the range –0.3 to 26 V.

⁽²⁾ JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.