INA219BIDR Datasheet, PDF (1/40 Pages) Texas Instruments – Zerø-Drift, Bi-Directional CURRENT/POWER MONITOR with I2C™ Interface

INA219
www.ti.com
SBOS448F – AUGUST 2008 – REVISED SEPTEMBER 2011
Zerø-Drift, Bi-Directional
CURRENT/POWER MONITOR with I²C™ Interface
Check for Samples: INA219
FEATURES
1
•23 SENSES BUS VOLTAGES FROM 0V TO +26V
• REPORTS CURRENT, VOLTAGE, AND POWER
• 16 PROGRAMMABLE ADDRESSES
• HIGH ACCURACY: 0.5% (Max) OVER
TEMPERATURE (INA219B)
• FILTERING OPTIONS
• CALIBRATION REGISTERS
• SOT23-8 AND SO-8 PACKAGES
APPLICATIONS
• SERVERS
• TELECOM EQUIPMENT
• NOTEBOOK COMPUTERS
• POWER MANAGEMENT
• BATTERY CHARGERS
• WELDING EQUIPMENT
• POWER SUPPLIES
• TEST EQUIPMENT
DESCRIPTION
The INA219 is a high-side current shunt and power
monitor with an I²C interface. The INA219 monitors
both shunt drop and supply voltage, with
programmable conversion times and filtering. A
programmable calibration value, combined with an
internal multiplier, enables direct readouts in
amperes. An additional multiplying register calculates
power in watts. The I²C 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 0V to 26V. The device uses a single +3V to
+5.5V supply, drawing a maximum of 1mA of supply
current. The INA219 operates from –40°C to +125°C.
RELATED PRODUCTS
DESCRIPTION
DEVICE
Current/Power Monitor with Watchdog,
Peak-Hold, and Fast Comparator Functions
INA209
Zerø-Drift, Low-Cost, Analog Current Shunt
Monitor Series in Small Package
INA210, INA211, INA212,
INA213, INA214
V_IN+ V_IN-
V_S
(Supply Voltage)
INA219
PGA
ADC
´
Power Register
Current Register
Voltage Register
I²C
Interface
Data
CLK
A0
A1
GND
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I²C is a trademark of NXP Semiconductors.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2011, Texas Instruments Incorporated