0
ACTIVE
Product type |
Analog output |
Common-mode voltage (max) (V) |
110 |
Common-mode voltage (min) (V) |
-4 |
Input offset (±) (max) (µV) |
150, 200, 250, 300, 500 |
Input offset drift (±) (typ) (µV/°C) |
0.07 |
Features |
High precision, Low-side Capable |
Rating |
Automotive |
Voltage gain (V/V) |
20, 50, 100, 200, 500 |
CMRR (min) (dB) |
120 |
Bandwidth (kHz) |
900, 1000, 1300 |
Supply voltage (max) (V) |
20 |
Supply voltage (min) (V) |
2.7 |
Iq (max) (mA) |
2.25 |
Number of channels |
1 |
Comparators (#) |
0 |
Gain error (%) |
0.5 |
Gain error drift (±) (max) (ppm/°C) |
20 |
Slew rate (V/µs) |
2.5 |
TI functional safety category |
Functional Safety-Capable |
Operating temperature range (°C) |
-40 to 125 |
SOT-23 (DBV)-5-8.12 mm² 2.9 x 2.8
The INA281-Q1 is a high-precision current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA281-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.3 MHz and an 65-dB AC CMRR (at 50 kHz).
The INA281-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range for current-sensing applications.
The INA281-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.
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