36-V, High-Side, Current Output Current Shunt Monitor - INA138

INA138 (ACTIVE)

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

 

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 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.

For all available packages, see the orderable addendum at the end of the datasheet.

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

View more

Parametrics Compare all products in Current Shunt Analog Output

 
Common Mode Voltage (Max) (V)
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/Degrees Celsius)
Gain (V/V)
Gain Error (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Rating
Operating Temperature Range (C)
Package Group
Package Size (mm2=WxL)
Common Mode Voltage (Min) (V)
Approx. Price (US$)
INA138 INA139 INA168 INA169
36     36     60     60    
1000     1000     1000     1000    
1     1     1     1    
Adjustable     Adjustable     Adjustable     Adjustable    
1     1     1     1    
120     120     120     120    
800     4400     800     4400    
36     40     60     60    
2.7     2.7     2.7     2.7    
0.06     0.125     0.06     0.125    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
SOT-23     SOT-23     SOT-23     SOT-23    
5SOT-23: 8 mm2: 2.8 x 2.9     5SOT-23: 8 mm2: 2.8 x 2.9     5SOT-23: 8 mm2: 2.8 x 2.9     5SOT-23: 8 mm2: 2.8 x 2.9    
2.7     2.7     2.7     2.7    
0.65 | 1ku     0.65 | 1ku     0.85 | 1ku     0.85 | 1ku    

Other qualified versions of INA138

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