INA186 Voltage output high-side measurement current shunt monitor | TI.com

INA186 (ACTIVE) Voltage output high-side measurement current shunt monitor

 

Description

The INA186 is a bidirectional, low-power, voltage-output, current-sense amplifier (also called a current-shunt monitor). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA186 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The low input bias current of the INA186 permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA186 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 90 µA of supply current. The device is specified over the operating temperature range of –40°C to +125°C, and offered in an SC70 package.

Features

  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current, IQ: 48 µA (typ)
  • Low input bias currents, IIB: 500 pA (typ)
    (enables microamp current measurement)
  • Bidirectional current sensing capability
  • Accuracy:
    • Gain error, EG: ±1% (max)
    • Gain drift: 10 ppm/°C (max)
    • Offset voltage, VOS: ±50 µV (max)
    • Offset drift: 0.5 µV/°C (max)
  • Wide common-mode voltage range, VCM: –0.2 V to +40 V
  • Gain options:
    • INA186A1: 25 V/V
    • INA186A2: 50 V/V
    • INA186A3: 100 V/V
    • INA186A4: 200 V/V
    • INA186A5: 500 V/V

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INA186 Error Analysis guide
0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
1.7 ≤ 
V ≤ 5.5
-0.2 ≤ 
V ≤ 40
-40 ≤ 
C ≤ 125
X Scale:

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)
INA186 Order now 40     -0.2     50     0.05     100
200
25
50
500    
0.9     10     120     45
37
35
32
27    
5.5     1.7     0.09     1       Bi-directional
Low-side Capable    
Catalog     -40 to 125     SC70 | 6     6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)    
INA190 Order now 40     -0.2     15     0.01     100
200
25
50
500    
0.2
0.3
0.4    
7     132     45
37
35
32
27    
5.5     1.7     0.09     1     0     Bi-directional
Low-side Capable    
Catalog     -40 to 125     SC70 | 6
UQFN | 10    
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
10UQFN: 3 mm2: 1.4 x 1.8 (UQFN | 10)    
INA191 Order now 40     -0.2     15     0.01     100
200
25
50
500    
0.3     7     120     45
37
35
32
27    
5.5     1.7     0.09     1     0     Low-side Capable
Small WCSP Package    
Catalog     -40 to 125     DSBGA | 6     See datasheet (DSBGA)    
INA199 Order now 26     -0.1     150     0.1