INA138 (ACTIVE)

36-V, High-Side, Current Output Current Shunt Monitor

36-V, High-Side, Current Output Current Shunt Monitor - INA138
Datasheet
INA1x8 High-Side Measurement Current Shunt Monitor datasheet (Rev. E)
 

Recommended alternative parts

  • INA225  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Improved accuracy with voltage output

Description

The INA138 and INA168 (INA1x8) are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7 V to 36 V for the INA138 and 2.7 V to 60 V for the INA168. Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both the INA138 and INA168 are available in SOT23-5 and are specified for the –40°C to 125°C temperature range.

 

Features

  • Complete Unipolar High-Side Current Measurement Circuit
  • Wide Supply and Common-Mode Range
  • INA138: 2.7 V to 36 V
  • INA168: 2.7 V to 60 V
  • Independent Supply and Input Common-Mode Voltages
  • Single Resistor Gain Set
  • Low Quiescent Current (25 µA Typical)
  • Wide Temperature Range: –40°C to +125°C
  • 5-Pin SOT-23 Package

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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 (%)
CMRR (Min) (dB)
Bandwidth (kHz)
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)
Gain Error Drift (Max) (ppm/°C)
INA138 INA139 INA168 INA169 INA170
36    36    60    60    60   
2.7    2.7    2.7    2.7    2.7   
1000    1000    1000    1000    1000   
1    1    1    1    1   
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
2    2    2    2    2   
100    100    100    100    100   
800    4400    800    4400    4000   
36    40    60    60    60   
2.7    2.7    2.7    2.7    2.7   
0.06    0.125    0.06    0.125    0.125   
Current Output    Current Output    Current Output    Current Output    Current Output   
Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85   
SOT-23    SOT-23    SOT-23    SOT-23    VSSOP   
5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
100    100    100    100    100   

Other qualified versions of INA138

Version Part Number Definition
Automotive INA138-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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INA138 Error Analysis

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