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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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) |
INA138 | INA139 | INA168 | INA169 | INA170 |
---|---|---|---|---|
36 | 36 | 60 | 60 | 60 |
2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
1000 | 1000 | 1000 | 1000 | 1000 |
1 | 1 | 1 | 1 | 1 |
Adjustable | Adjustable | Adjustable | Adjustable | Adjustable |
2 | 2 | 2 | 2 | 2 |
100 | 100 | 100 | 100 | 100 |
800 | 4400 | 800 | 4400 | 4000 |
36 | 40 | 60 | 60 | 60 |
2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
0.06 | 0.125 | 0.06 | 0.125 | 0.125 |
Current Output | Current Output | Current Output | Current Output | Current Output |
Catalog | Catalog | Catalog | Catalog | Catalog |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 |
SOT-23 | SOT-23 | SOT-23 | SOT-23 | VSSOP |
5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 8VSSOP: 15 mm2: 4.9 x 3(VSSOP) |
100 | 100 | 100 | 100 | 100 |
Order Now | Order Now | Order Now | Order Now | Order Now |
Version | Part Number | Definition |
---|---|---|
Automotive | INA138-Q1 | Q100 devices qualified for high-reliability automotive applications targeting zero defects |