INA190 40V high-precision, low bias current, low power current sense amplifier with ENABLE | TI.com

INA190 (ACTIVE) 40V high-precision, low bias current, low power current sense amplifier with ENABLE

 

Description

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 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 INA190 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 INA190 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. The device is specified over the operating temperature range of –40°C to +125°C, and offered in UQFN and SC70 packages.

Features

  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (max)
    • Low quiescent current: 50 µA at 25°C (Typ)
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Bidirectional current sensing capability
  • Accuracy:
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 5-ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 0.13-µV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Gain options:
    • INA190A1: 25 V/V
    • INA190A2: 50 V/V
    • INA190A3: 100 V/V
    • INA190A4: 200 V/V
    • INA190A5: 500 V/V
  • Packages: 10-pin UQFN, 6-pin SC70

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INA190 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
1.7 ≤ 
V ≤ 5.5
-0.2 ≤ 
V ≤ 40
-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)
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)    
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)    
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     100
200