INA250 36V Low-/High-Side, Bi-Directional, Current Sense Amp w/Precision Integrated Shunt Resistor | TI.com

INA250 (ACTIVE)

36V Low-/High-Side, Bi-Directional, Current Sense Amp w/Precision Integrated Shunt Resistor

36V Low-/High-Side, Bi-Directional, Current Sense Amp w/Precision Integrated Shunt Resistor - INA250
 

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 Sense Amplifiers Analog Output

 
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)
Number of Channels (#)
Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
INA250 INA253
36     80    
0     -4    
100
50
30
20
mA    
12.5
mA    
250 µA/C     125µA/C    
200
2000
500
800
mV/A    
100
200
400
mV/A    
0.3     0.2    
45     10    
100     120    
50     380    
36     5.5    
2.7     2.7    
0.35     3.5    
1     1    
Bi-directional
Integrated Shunt
Low-side Capable    
Bi-directional
Enhanced PWM Rejection
Integrated Shunt
Low-side Capable    
Catalog     Catalog    
-40 to 125     -40 to 125    
TSSOP | 16     TSSOP | 20    
16TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 16)     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)    

INA250 Error Analysis

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