36-V Low-/High-Side Bi-Directional Zero-Drift Current Sense Amp w/Precision Int Shunt Resistor - INA250

INA250 (ACTIVE)

36-V Low-/High-Side Bi-Directional Zero-Drift Current Sense Amp w/Precision Int Shunt Resistor

 

Description

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.

Features

  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2 mΩ
    • Shunt Resistor Tolerance: 0.1% (Max)
    • 15 A Continuous from –40°C to 85°C
    • 0°C to 125°C Temperature Coefficient:
      10 ppm/°C
  • High Accuracy:
    • Gain Error (Shunt and Amplifier): 0.3% (Max)
    • Offset Current: 50 mA (Max, INA250A2)
  • Four Available Gains:
    • INA250A1: 200 mV/A
    • INA250A2: 500 mV/A
    • INA250A3: 800 mV/A
    • INA250A4: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to 125°C

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Parametrics Compare all products in Current Sensing With Integrated Shunt

 
Common Mode Voltage (Max) (V)
Input Offset Current (+/-) (Max) (mA)
Input Offset Current Drift (+/-) (Typ) (µA/°C)
Gain (Typ) (mV/A)
Gain Error (%)
Integrated Shunt Value (Nom) (mΩ)
Integrated Shunt Tolerance (Nom) (%)
Integrated Shunt Temperature Drift (Typ) (PPM/°C)
Continuous Current (Max) (A)
Bandwidth (kHz)
CMRR (Min) (dB)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Common Mode Voltage (Min) (V)
INA250
36   
50   
25   
200
500
800
2000   
0.3   
2   
0.1   
15   
15   
50   
100   
36   
2.7   
0.35   
Bi-directional
Integrated Shunt
Low-side Capable   
Catalog   
-40 to 125   
TSSOP   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)   
0   

Other qualified versions of INA250

Version Part Number Definition
Automotive INA250-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

INA250 Error Analysis

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