26V, Bidirectional, Low- or High-Side Voltage Output Current Sense Amplifier - INA181

INA181 (ACTIVE)

26V, Bidirectional, Low- or High-Side Voltage Output Current Sense Amplifier

 

Description

The INA181 is a family of cost-optimized, bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INA181 integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

The INA181 operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 260 µA of supply current.

All device options are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 6-pin, SOT-23 package.

 

Features

  • Common-Mode Range (VCM): –0.2 V to +26 V
  • High Bandwidth: 350 kHz
  • Offset Voltage:
    • ±150 µV (Max) at VCM = 0 V
    • ±500 µV (Max) at VCM = 12 V
  • Output Slew Rate: 2 V/µs
  • Bidirectional Current-Sensing Capability
  • Accuracy:
    • ±1% Gain Error (Max)
    • 1-µV/°C Offset Drift (Max)
  • Gain Options:
    • 20 V/V (A1 Devices)
    • 50 V/V (A2 Devices)
    • 100 V/V (A3 Devices)
    • 200 V/V (A4 Devices)
  • Quiescent Current: 260 µA (Max per Channel)

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Parametrics Compare all products in Current Sense Amplifiers Analog Output

 
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 (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Special Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Gain Error Drift (Max) (ppm/°C)
PSRR (Typ) (uV/V)
Specified Common Mode Voltage (V)
Specified Power Supply Voltage (V)
INA181 INA180 INA199 INA210
26    26    26    26   
-0.2    -0.2    -0.1    -0.3   
150    150    150    35
60
100   
0.2    0.2    0.1    0.1   
20
50
100
200   
20
50
100
200   
50
100
200   
50
75
100
200
500
1000   
1    1    1    0.5   
84    84    100    105   
350
210
150
105   
350
210
150
105   
80
30
14   
80
40
30
14
7
4   
5.5    5.5    26    26   
2.7    2.7    2.7    2.7   
0.3    0.3    0.115    0.115   
Bi-directional
Low-side Capable   
Low-side Capable    Bi-directional
Low-side Capable   
Bi-directional
Low-side Capable   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
SOT-23    SOT-23    SC70
UQFN   
SC70
UQFN   
6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    10UQFN: 3 mm2: 1.4 x 1.8(UQFN)
6SC70: 4 mm2: 2.1 x 2(SC70)   
10UQFN: 3 mm2: 1.4 x 1.8(UQFN)
6SC70: 4 mm2: 2.1 x 2(SC70)   
20    20    10    10   
8    8    0.1    0.1   
0    0    12    12   
5    5    5    5   

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INA181 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 5.5
-0.2 ≤ 
V ≤ 26
-40 ≤ 
C ≤ 125