The INA381 includes both a 26-V common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions through measuring the voltage developed across a current-shunt resistor and comparing that voltage to a defined threshold limit set by the comparator reference pin. The current-shunt monitor can measure differential voltage signals on common-mode voltages that can vary from –0.2 V up to 26 V, independent of the supply voltage.
The open-drain alert output can be configured to operate in either a transparent mode where the output status follows the input state or in a latched mode where the alert output is cleared when the latch is reset. The standalone comparator alert response time is under 3 µs, allowing for quick detection of overcurrent events. The total system overcurrent protection provided by the INA381 is under 10 µs.
This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 350 µA. The device is specified over the extended operating temperature range (–40°C to +125°C), and is available in an 8-pin WSON package.
All trademarks are the property of their respective owners.
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) |
INA381 | INA302 | INA303 |
---|---|---|
26 | 36 | 36 |
-0.2 | 0 | 0 |
150 |
30 50 80 |
30 50 80 |
0.2 | 0.1 | 0.1 |
100 20 200 50 |
100 20 50 |
100 20 50 |
1 |
0.1 0.15 0.2 |
0.1 0.15 0.2 |
20 | 10 | 10 |
84 | 100 | 100 |
350 210 150 105 |
550 440 400 |
550 500 450 |
5.5 | 5.5 | 5.5 |
2.7 | 2.7 | 2.7 |
0.5 | 1.1 | 1.1 |
1 | 1 | 1 |
1 | 2 | 2 |
Alert Function Low-side Capable |
Alert Function Bi-directional Low-side Capable |
Alert Function Bi-directional Low-side Capable |
Catalog | Catalog | Catalog |
-40 to 125 | -40 to 125 | -40 to 125 |
WSON | 8 | TSSOP | 14 | TSSOP | 14 |
See datasheet (WSON) | 14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14) | 14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14) |
Order now | Order now | Order now |