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

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

INA250 Error Analysis

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

Parametrics

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Part number Order 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 (#) Comparators (#) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
INA250 Order now 36     0     100mA
50mA
30mA
20mA    
250uA/C     2000mV/A
200mV/A
500mV/A
800mV/A    
0.3     45     100     50     36     2.7     0.35     1     0     Bi-directional
Integrated Shunt
Low-side Capable    
Catalog     -40 to 125     TSSOP | 16     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
INA253 Order now 80     -4     12.5mA     125uA/C     100mV/A
200mV/A
400mV/A    
0.4     45     120     350     5.5     2.7     2.6     1     0     Bi-directional
Enhanced PWM Rejection
Integrated Shunt
Low-side Capable    
Catalog     -40 to 125     TSSOP | 20     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)