INA191 40V,low-/high-side, zero-drift, voltage output CSA w/low bias current & enable in WCSP package | TI.com

INA191
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40V,low-/high-side, zero-drift, voltage output CSA w/low bias current & enable in WCSP package

 

Description

The INA191 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier) that is commonly used for overcurrent protection, precision-current measurement for system optimization, or in closed-loop feedback circuits. This device can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. The low input bias current of the INA191 permits the use of larger current-sense resistors, and thus provides accurate current measurements in the µA range. Five fixed gains are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement, and allows for smaller sense resistors with lower power loss while still providing accurate current measurements.

The INA191 operates from a single 1.7-V to 5.5-V power supply, drawing a maximum of 65 µA of supply current when enabled and only 100 nA when disabled. The device is specified over the operating temperature range of –40°C to +125°C, and offered in a DSBGA-6 package.

Features

  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low shutdown current: 100 nA (max)
    • Low quiescent current: 43 µA at 25°C (typ)
  • Low input bias currents: 100 pA (typ)
    (enables microamp current measurement)
  • Accuracy:
    • ±0.25% max gain error (A2 to A5 devices)
    • 7-ppm/°C gain drift (max)
    • ±12 µV (max) offset voltage
    • 0.13-µV/°C offset drift (max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Gain options:
    • INA191A1: 25 V/V
    • INA191A2: 50 V/V
    • INA191A3: 100 V/V
    • INA191A4: 200 V/V
    • INA191A5: 500 V/V
  • Package: 0.895-mm2 DSBGA

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INA191 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

Compare all products in Current sense amplifiers analog output Email Download to Excel
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)
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)    
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
SOT-23-THIN | 8    
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
8SOT-23-THIN: 8 mm2: 2.8 x 2.9 (SOT-23-THIN | 8)    
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
SOT-23-THIN | 8
UQFN | 10    
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
8SOT-23-THIN: 8 mm2: 2.8 x 2.9 (SOT-23-THIN | 8)
10UQFN: 3 mm2: 1.4 x 1.8 (UQFN | 10)    
INA199 Order now 26     -0.1