High-Side Measurement Current Shunt Monitor, Current Output - INA138

INA138 (ACTIVE)

High-Side Measurement Current Shunt Monitor, Current Output

Recommended alternative parts

  • INA210  -  High accuracy voltage output.
  • INA139  -  Gain Bandwidth up to 4.4MHz
  • INA169  -  Gain–bandwidth up to 4.4MHz and common-mode input range up to 80V

Description

The INA138 and INA168 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7V to 36V for the INA138 and 2.7V to 60V for the INA168. Quiescent current is only 25µA, 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: 2.7V to 36V
  • INA168: 2.7V to 60V
  • INDEPENDENT SUPPLY AND INPUT COMMONMODE VOLTAGES
  • SINGLE RESISTOR GAIN SET
  • LOW QUIESCENT CURRENT (25µA typ)
  • WIDE TEMPERATURE RANGE: –40°C to +125°C
  • SOT23-5 PACKAGE
  • APPLICATIONS
    • CURRENT SHUNT MEASUREMENT:
        Automotive, Telephone, Computers
    • PORTABLE AND BATTERY-BACKUP SYSTEMS
    • BATTERY CHARGERS
    • POWER MANAGEMENT
    • CELL PHONES
    • PRECISION CURRENT SOURCE

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Parametrics Compare all products in Current Shunt Monitor Analog Current Output

 
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/Degrees Celsius)
Iq (Max) (mA)
Gain (V/V)
Small-Signal Bandwidth (Typ) (MHz)
CMRR (Min) (dB)
Vs (Min) (V)
Vs (Max) (V)
Common Mode Range (Min)
Common Mode Range (Max)
Special Features
Rating
Operating Temperature Range (C)
Package Group
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
INA138 INA138-Q1 INA168 INA168-Q1
1000     2000     1000     1000    
1     1     1     1    
0.06     0.06     0.06     0.06    
1 to 100     1 to 100     1 to 100     1 to 100    
0.8     0.8     0.8     0.8    
120     120     120     120    
2.7     2.7     2.7     2.7    
36     36     60     60    
2.7     2.7     2.7     2.7    
36     36     60     60    
Analog Output     Analog Output     Analog Output     Analog Output    
Catalog     Automotive     Catalog     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
SOT-23     TSSOP     SOT-23     SOT-23
TSSOP    
5SOT-23: 1.6 x 2.9: 10 mm2     8TSSOP: 4.4 x 3: 19 mm2     5SOT-23: 1.6 x 2.9: 10 mm2     5SOT-23: 1.6 x 2.9: 10 mm2
8TSSOP: 4.4 x 3: 19 mm2    
0.65 | 1ku     0.80 | 1ku     0.80 | 1ku     0.94 | 1ku    

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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