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.
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|Common Mode Voltage (Max) (V)|
|Common Mode Voltage (Min) (V)|
|Input Offset (+/-) (Max) (uV)|
|Input Offset Drift (+/-) (Typ) (uV/C)|
|Gain Error (%)|
|CMRR (Min) (dB)|
|Supply Voltage (Max) (V)|
|Supply Voltage (Min) (V)|
|Iq (Max) (mA)|
|Operating Temperature Range (C)|
|Package Size: mm2:W x L (PKG)|
|Gain Error Drift (Max) (ppm/°C)|
| 20 |
| 20 |
| 50 |
| 350 |
| 350 |
| 80 |
| Bi-directional |
|Low-side Capable|| Bi-directional |
|-40 to 125||-40 to 125||-40 to 125|
|SOT-23||SOT-23|| SC70 |
|6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)||5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)|| 6SC70: 4 mm2: 2.1 x 2(SC70) |
10UQFN: 3 mm2: 1.4 x 1.8(UQFN)
|Order Now||Order Now||Order Now|