INA4181 (ACTIVE)

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

 

Sample Availability

Prototype samples are available. Order Now

Description

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of 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 INAx181 family 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.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.

The INA181 is available in a 6-pin, SOT-23 package, the INA2181 is available in an 10-pin VSSOP package, and the INA4181 is available in a 20-pin TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

Features

  • Common-Mode Range (VCM): –0.2 V to +26 V
  • High Bandwidth: 350 kHz (A1 Devices)
  • 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 (INA181)

All trademarks are the property of their respective owners.

View more

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)
Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Gain Error Drift (Max) (ppm/°C)
INA4181 INA180 INA2180 INA4180
26    26    26    26   
-0.2    -0.2    -0.2    -0.2   
150    150    150    150   
0.2    0.2    0.2    0.2   
100
20
200
50   
20
50
100
200   
20
50
100
200   
100
20
200
50   
1    1    1    1   
84    84    84    84   
350
210
150
105   
350
210
150
105   
350
210
150
105   
350
210
150
105   
5.5    5.5    5.5    5.5   
2.7    2.7    2.7    2.7   
1    0.3    0.5    1   
Bi-directional
Low-side Capable
Quad channel   
Low-side Capable    Dual channel
Low-side Capable   
Bi-directional
Low-side Capable
Quad channel   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
TSSOP    SOT-23    VSSOP    TSSOP   
20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP)    5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    8VSSOP: 15 mm2: 4.9 x 3(VSSOP)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)   
20    20    20    20   

Featured tools and software