INA223_15 Datasheet, PDF (1/31 Pages) Texas Instruments – Analog Output Current Shunt and Voltage Instantaneous Power Monitor

INA223
www.ti.com
SBOS528 – JUNE 2012
Analog Output Current Shunt and Voltage
Instantaneous Power Monitor
Check for Samples: INA223
FEATURES
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•23 Wide Common-Mode Range: 0 V to 26 V
• ±100 µV Offset (Max, Gain = 300 V/V)
• Accuracy
– ±0.25% Shunt Voltage Gain Error (Max)
– ±0.15% Bus Voltage Gain Error (Max)
– 1.25% Power Error (Max)
– 0.3 μV/°C Offset Drift (Max)
– 50 ppm/°C Gain Drift (Max)
• Programmable Gains
– Current Shunt Voltage Gains: 20, 128, 300
– Bus Voltage Attenuations: 1/10, 1/5, 2/5
• Monitors/Measures/Reports:
– Instantaneous Power
– Bus Voltage
– Load Current
• Quiescent Current: 250 µA (Max)
• Shutdown Current: 1 µA (Max)
APPLICATIONS
• Notebook Computers
• Cell Phones
• Telecom Equipment
• Power Management
DESCRIPTION
The INA223 is a voltage-output device that monitors
the current, bus voltage, and power of a supply line
by sensing a voltage drop across a shunt at common-
mode voltages from 0 V to 26 V. The common-mode
voltage range is independent of the supply voltage.
The low offset of the Zerø-Drift architecture enables
current sensing with maximum drops across the
shunt as low as 10 mV, full-scale.
The INA223 includes a two-wire interface used for
adjusting the configuration settings of the device. The
interface is used to control the signal (current shunt
voltage, bus voltage, or power) that is directed to the
device output. Multiple gain and attenuation settings
can be programmed through the two-wire interface to
allow for application-specific configurations. The
programmable gain feature also allows the device to
be operated over a much wider dynamic current load
range without having to switch the sensing element
used.
A shutdown feature is available to disable the device
and effectively disconnect it from the shunt resistor
and supply voltage, thus reducing the drain on the
battery.
The INA223 operates from a single +2.7-V to +5.5-V
supply, drawing a maximum supply current of 250 µA.
It is specified over the extended temperature range of
–40°C to +105°C, and is offered in an SON-10
package.
Power Supply
(0V to 26V)
R_SHUNT
Load
C_BYPASS
0.1mF
V_S (Supply Voltage)
Attenuator
V_IN-
V_OUT
R_PULLUP
4.7kW
SCL
V_IN+
Two-Wire
SDA
Interface
A0
INA223
GND
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TransZorb is a trademark of General Instruments, Inc.
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All other trademarks are the property of their respective owners.
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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 © 2012, Texas Instruments Incorporated