INA3221_15 Datasheet, PDF (1/40 Pages) Texas Instruments – Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor with I2C™ Interface

INA3221
www.ti.com
SBOS576A – MAY 2012 – REVISED JUNE 2013
Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor
with I²C™ Interface
Check for Samples: INA3221
FEATURES
1
•23 Senses Bus Voltages From 0 V to +26 V
• Reports Shunt and Bus Voltage
• High Accuracy:
– Offset Voltage: ±80 µV (max)
– Gain Error: 0.25% (max)
• Configurable Averaging Options
• Four Programmable Addresses
• Power-Supply Operation: 2.7 V to 5.5 V
• Programmable Alert and Warning Outputs
APPLICATIONS
• Computers
• Power Management
• Telecom Equipment
• Battery Chargers
• Power Supplies
• Test Equipment
DESCRIPTION
The INA3221 is a three-channel, high-side current
and bus voltage monitor with an I²C interface. The
INA3221 monitors both shunt voltage drops and bus
supply voltages in addition to having programmable
conversion times and averaging modes for these
signals. The INA3221 offers both critical and warning
alerts to detect multiple programmable out-of-range
conditions for each channel.
The INA3221 senses current on buses that can vary
from 0 V to +26 V. The device is powered from a
single +2.7-V to +5.5-V supply and draws 350 μA
(typ) of supply current. The INA3221 is specified over
the operating temperature range of –40°C to +125°C.
The I²C interface features four programmable
addresses.
RELATED PRODUCTS
DESCRIPTION
DEVICE
High- or low-side, bi-directional current and
power monitor with two-wire interface
INA226
Zero-drift, bi-directional current power monitor
with two-wire interface
INA219
Current and power monitor with watchdog,
peak-hold, and fast comparator functions
INA209
Zero-drift, low-cost, analog current-shunt
monitor series in small package
INA210, INA211, INA212,
INA213, INA214
Power
Supply
(0V to 26V)
Load 1
Power
Supply
(0V to 26V)
VIN+2
VIN-2
Load 2
VIN+1
VIN-1
CH 2
CH 1
ADC
CH 3
Bus
Voltages 1-3
Shunt
Voltages 1-3
Critical Limit
Alerts 1-3
Shunt Voltage
Sum Alerts
Power
Supply
(0V to 26V)
VIN+3
VIN-3
GND
Load 3
CBYPASS
0.1µF
VS (Supply
Voltage)
I²C
Interface
SDA
SCL
A0
VPU
10kΩ
VS
VPU
Power Valid
Critical
Warning
Timing Control
10kΩ
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 © 2012–2013, Texas Instruments Incorporated