1 Features

• 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 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 halfbridge

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.