INA293B3IDBVR

The INA293 is an ultra-precise current-sensing amplifier that can measure the voltage drop across a shunt resistor within a wide common-mode range from –4V to 110V. The negative common-mode voltage allows the device to operate at voltages below the ground voltage, enabling accurate measurement of recirculating current in half-bridge applications. The combination of low offset voltage, small gain error, and high DC CMRR enables high-precision current measurement. The INA293 is suitable not only for DC current measurement but also for high-speed applications (such as fast overcurrent protection), which feature a high bandwidth of 1.3MHz and an AC CMRR of 85dB (at 50kHz). The INA293 is powered by a single supply voltage from 2.7V to 20V, with a supply current of 1.5mA. The INA293 offers five gain options: 20V/V, 50V/V, 100V/V, 200V/V, and 500V/V. These gain options can meet the requirements of wide dynamic range current-sensing applications. The INA293 is rated for operation over a temperature range from -40°C to +125°C and is available in a space-saving SOT-23 package with two pin configurations.

Applications

• Active Antenna System mMIMO (AAS)
• Macro Remote Radio Unit (RRU)
• 48V Rack Server
• 48V Commercial Network and Server PSU
• 48V Battery Management System (BMS)

Key features

• Wide common-mode voltage range:
• Operating voltage: -4V to +110V
• Survivable voltage: -20V to +120V
• Excellent CMRR:
• 160dB DC CMRR
• 85dB AC CMRR (at 50kHz)
• Accuracy:
• Gain:
• Gain error: ±0.15% (maximum)
• Gain drift: ±10ppm/°C (maximum)
• Offset voltage:
• Offset voltage: ±15μV (typical)
• Temperature drift: ±0.05μV/°C (typical)
• Available gains:
• INA293A1, INA293B1: 20V/V
• INA293A2, INA293B2: 50V/V
• INA293A3, INA293B3: 100V/V
• INA293A4, INA293B4: 200V/V
• INA293A5, INA293B5: 500V/V
• High bandwidth: 1.3 MHz
• Slew rate: 2.5 V/µs
• Quiescent current: 1.5mA