INA3221 26V, Triple, Bi-Directional, Low-/High-Side, I2C Out Current/Voltage Monitor w/Alerts | TI.com

INA3221 (ACTIVE)

26V, Triple, Bi-Directional, 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/voltage/power monitors

 
Common mode voltage (Max) (V)
Common mode voltage (Min) (V)
Input offset (+/-) (Max) (uV)
Input offset drift (+/-) (Typ) (uV/C)
Gain (V/V)
Gain error (%)
Gain error drift (+/-) (Max) (ppm/°C)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Digital interface
Features
Rating
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
INA3221
26    
0    
80    
0.1    
1    
0.25    
50    
110    
3.5    
5.5    
2.7    
0.35    
I2C
SMBus    
Alert Function
Bi-directional
Low-side Capable    
Catalog    
-40 to 125    
VQFN | 16    
16VQFN: 16 mm2: 4 x 4 (VQFN | 16)    

Design tool

INA3221 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 36
0 ≤ 
V ≤ 36
-40 ≤ 
C ≤ 125