INA3221-Q1 Datasheet, PDF (1/45 Pages) Texas Instruments – Current and Voltage Monitor with Programmable Overcurrent Alerts

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INA3221-Q1
SBOS776B – MARCH 2016 – REVISED MARCH 2016
INA3221-Q1 Automotive, 26-V, Triple-Channel, Bidirectional, Zero-Drift, Low- or High-Side,
I²C-Compatible, Current and Voltage Monitor with Programmable Overcurrent Alerts
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C6
• 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
• Programmable Alert and Warning Outputs
• Power-Supply Operation: 2.7 V to 5.5 V
2 Applications
• Infotainment
• Rear-Seat Entertainment
• Digital Clusters
• Electronic Control Units
3 Description
The INA3221-Q1 is a three-channel, high-side current
and bus voltage monitor with an I²C- and SMBUS-
compatible interface. The INA3221-Q1 monitors both
shunt voltage drops and bus supply voltages, in
addition to having programmable conversion times
and averaging modes for these signals. The
INA3221-Q1 offers both critical and warning alerts to
detect multiple programmable out-of-range conditions
for each channel.
The INA3221-Q1 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-Q1 is specified over
the operating temperature range of –40°C to +125°C.
The I²C- and SMBUS-compatible interface features
four programmable addresses.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA3221-Q1
VQFN (16)
4.00 mm x 4.00 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Power Supply
(0 V to 26 V)
Typical Application
Load 1
CBYPASS
0.1 µF
Power Supply
(0 V to 26 V)
VIN+2
VIN±2
VIN+1
CH 2
Load 2
Power Supply
(0 V to 26 V)
VIN+3
VIN±1
CH 1
ADC
CH 3
Bus
Voltages 1-3
Shunt
Voltages 1-3
Critical Limit
Alerts 1-3
Shunt Voltage
Sum Alerts
VIN±3
GND
VS (Supply
Voltage)
SDA
I²C-
and
SCL
SMBus-
Compatible A0
Interface
VPU
VPU
Power Valid (PV)
Critical
Warning
Timing Control (TC)
Load 3
10 k
VS
10 k
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.