INA293A1IDBVR

1 Features

1• 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)

• 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

2 Applications

• Active antenna system mMIMO (AAS)

• Macro remote radio unit (RRU)

• 48-V rack server

• 48-V merchant network & server power supply

(PSU)

• 48-V battery management systems (BMS)

3 Description

The INA293 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 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.

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