INA219 Texas instruments

INA219

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INA219

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Описание

The INA219 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses. The INA219 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications. The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The INA219 operates from 40°C to 125°C.

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

Common-mode voltage (max) (V)	26
Common-mode voltage (min) (V)	0
Input offset (±) (max) (µV)	50
Input offset drift (±) (max) (µV/°C)	0.16
Input offset drift (±) (typ) (µV/°C)	0.1
Voltage gain (V/V)	0.125, 0.25, 0.5, 1
CMRR (min) (dB)	100
Bandwidth (kHz)	5.5
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	3
Iq (max) (mA)	1
Digital interface	I2C, SMBus
Gain error (%)	0.3, 0.5
Gain error drift (±) (max) (ppm/°C)	83
Features	Bi-directional, Integrated Power Monitor, Programmable Gain
Number of channels	1
Resolution (Bits)	12
Power measurement accuracy (%)	1
Rating	Catalog
Operating temperature range (°C)	-40 to 125