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INA3221-Q1
  • INA3221-Q1
  • INA3221-Q1

INA3221-Q1

ACTIVE

AEC-Q100, 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts

Texas Instruments INA3221-Q1 Product Info

1 April 2026 6

Parameters

Common-mode voltage (max) (V)

26

Common-mode voltage (min) (V)

0

Digital interface

I2C, SMBus

Resolution (Bits)

13

Input offset (±) (max) (µV)

80

Input offset drift (±) (max) (µV/°C)

0.5

Input offset drift (±) (typ) (µV/°C)

0.1

Voltage gain (V/V)

1

CMRR (min) (dB)

110

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.7

Iq (max) (mA)

0.35

Gain error (%)

0.25

Gain error drift (±) (max) (ppm/°C)

50

Features

Alert Function, Bidirectional, Low-side Capable

Number of channels

3

Power measurement accuracy (%)

0.5

TI functional safety category

Functional Safety-Capable

Rating

Automotive

Operating temperature range (°C)

-40 to 125

Package

VQFN (RGV)-16-16 mm² 4 x 4

Features

  • 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
  • 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

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.

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