INA3221 (ACTIVE)

26-V, Triple, Bi-Directional, Zero-Drift, Low-/High-Side, I2C Out Current/Voltage Monitor w/ Alerts

 

Description

The INA3221 is a three-channel, high-side current and bus voltage monitor with an I2C- and SMBUS-compatible 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- and SMBUS-compatible interface features four programmable addresses.

Features

  • 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

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Parametrics Compare all products in Current Sense Power / Current Monitors

 
Common Mode Voltage (Max) (V)
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/C)
Gain (V/V)
Gain Error (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Features
Digital Interface
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Common Mode Voltage (Min) (V)
Gain Error Drift (Max) (ppm/°C)
PSRR (Typ) (uV/V)
Specified Common Mode Voltage (V)
Specified Power Supply Voltage (V)
INA3221
26   
80   
0.1   
1   
0.25   
110   
3.5   
5.5   
2.7   
0.35   
Alert Function
Bi-directional
I2C
Low-side Capable   
I2C   
Catalog   
-40 to 125   
VQFN   
16VQFN: 16 mm2: 4 x 4(VQFN)   
0   
50   
15   
12   
3.3   

Other qualified versions of INA3221

Version Part Number Definition
Automotive INA3221-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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INA3221 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 5.5
0 ≤ 
V ≤ 26
-40 ≤ 
C ≤ 125