Features for the INA293
- Wide common-mode voltage:
- Operational voltage: −4 V to +110 V
- Survival voltage: −20 V to +120 V
- Excellent CMRR:
- 160-dB DC-CMRR
- 85-dB AC-CMRR at 50 kHz
- Accuracy:
- Gain:
- Gain error: ±0.15% (maximum)
- Gain drift: ±10 ppm/ °C (maximum)
- Offset:
- Offset voltage: ±15 µV (typical)
- Offset drift: ±0.05 µV/ °C (typical)
- Gain:
- Available gains:
- INA293A1, INA293B1 : 20 V/V
- INA293A2, INA293B2 : 50 V/V
- INA293A3, INA293B3 : 100 V/V
- INA293A4, INA293B4 : 200 V/V
- INA293A5, INA293B5 : 500 V/V
- High bandwidth: 1.3 MHz
- Slew rate: 2.5 V/µs
- Quiescent current: 1.5 mA
Description for the INA293
The INA293 is a ultra-precise 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 INA293 is not only designed for DC current measurement, but also for high-speed applications (ex. Fast over-current protection) with a high bandwidth of 1.3 MHz and an 85-dB AC CMRR (at 50 kHz).
The INA293 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA293 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 current-sensing applications.
The INA293 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.