The INA138 and INA168 (INA1x8) are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.
Input common-mode and power-supply voltages are independent and can range from 2.7 V to 36 V for the INA138 and 2.7 V to 60 V for the INA168. Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.
The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.
Both the INA138 and INA168 are available in SOT23-5 and are specified for the –40°C to 125°C temperature range.
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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)|
||36||2.7||1000||1||Adjustable||2||100||100||800||36||2.7||0.06||1||0||Current Output||Catalog||-40 to 125||SOT-23 | 5||5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)|
||36||2.7||1000||1||Adjustable||2||100||100||440||40||2.7||0.125||1||0||Current Output||Catalog||-40 to 125||SOT-23 | 5||5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)|
||60||2.7||1000||1||Adjustable||2||100||100||800||60||2.7||0.06||1||0||Current Output||Catalog||-40 to 125||SOT-23 | 5||5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)|