INA3221-Q1
AEC-Q100, 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts
INA3221-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40 °C to 125 °C
- Functional Safety-Capable
- Senses bus voltages from 0 V to 26 V
- Reports shunt and bus voltage
- High accuracy:
- Offset voltage: ±80 µV (maximum)
- Gain error: 0.25% (maximum)
- Configurable averaging options
- Four programmable addresses
- Programmable alert and warning outputs
- Power-supply operation: 2.7 V to 5.5 V
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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | INA3221-Q1AEC-Q100, 26-V, Triple Channel, 13-Bit, I2C Output Current and Voltage Monitor With Alerts datasheet (Rev. C) | PDF | HTML | 23 Mar 2021 |
Application note | Using a PCB Copper Trace as a Current-Sense Shunt Resistor | PDF | HTML | 25 Jan 2022 | |
Application note | Digital Interfaces for Current Sensing Devices (Rev. A) | PDF | HTML | 30 Sep 2021 | |
Application note | Getting Started with Digital Power Monitors (Rev. A) | PDF | HTML | 02 Sep 2021 | |
Functional safety information | INA3221-Q1 Functional Safety FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 20 May 2020 | |
Application brief | Energy and Power Monitoring with Digital Current Sensors | 25 May 2017 | ||
Application note | Understanding the I2C Bus | PDF | HTML | 30 Jun 2015 | |
EVM User's guide | INA3221EVM Evaluation Board and Software Tutorial | 23 Apr 2012 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
INA3221EVM — INA3221 Evaluation Module
The INA3221EVM is a platform for evaluating the performance of the INA3221 under various signal, shunt, and supply conditions.
INA3221SW-LINUX — Linux Driver for INA3221
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
- ina3221
SBOC425 — INA3221EVM User Software
Supported products & hardware
Products
Digital power monitors
Hardware development
Evaluation board
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
Supported products & hardware
Products
Analog current-sense amplifiers
Digital power monitors
SBOR021 — Power Monitor Tool
Supported products & hardware
Products
Digital power monitors
Digital power monitors with integrated shunt resistor
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (RGV) | 16 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Support & training
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