INA168 60V, High-Side, Current Output Current Sense Amplifier | TI.com

INA168 (ACTIVE)

60V, High-Side, Current Output Current Sense Amplifier

 

Recommended alternative parts

  • INA282  -  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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INA168 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 60
2.7 ≤ 
V ≤ 60
-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)
INA168 Order now 60     2.7     1000     1     Adjustable     2     100     100     800     60     2.7     0.06     1     0     Current Output     Catalog     -40 to 125     SOT-23 | 5     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
INA138 Order now 36     2.7     1000     1     Adjustable     2     100     100     800     36     2.7     0.06     1     0     Current Output     Catalog     -40 to 125     SOT-23 | 5     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
INA139 Order now 36     2.7     1000     1     Adjustable     2     100     100     4400     40     2.7     0.125     1     0     Current Output     Catalog     -40 to 125     SOT-23 | 5     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
INA169 Order now 60     2.7     1000     1     Adjustable     2     100     100