Texas Instruments INA293/INA293-Q1 Current Sense Amplifiers
Texas Instruments INA293/INA293-Q1 High-Precision Current Sense Amplifiers measure voltage drops across shunt resistors from –4V to 110V. The negative common-mode voltage allows operation below ground, accommodating precise measurement of recirculating currents in half-bridge applications. Combining a low offset voltage, small gain error, and high DC CMRR enables highly accurate current measurement. The INA293/INA293-Q1 is also designed for high-speed applications (ex. fast over-current protection) with a high bandwidth of 1.3MHz and an 85dB AC CMRR (at 50kHz). The Texas Instruments INA293-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Wide common-mode voltage
- Operational voltage: −4V to +110V
- Survival 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
- Offset voltage: ±15µV (typical)
- Offset drift: ±0.05µV/°C (typical)
- Gain
- Available gains
- INA293A1, INA293B1 : 20V/V
- INA293A2, INA293B2 : 50V/V
- INA293A3, INA293B3 : 100V/V
- INA293A4, INA293B4 : 200V/V
- INA293A5, INA293B5 : 500V/V
- 1.3MHz high bandwidth
- 2.5V/µs slew rate
- 1.5mA quiescent current
Applications
- Active antenna system mMIMO (AAS)
- Macro remote radio unit (RRU)
- 48V rack server
- 48V merchant network and server power supply (PSU)
- 48-V battery management systems (BMS)
Datasheet
Functional Block Diagram
Related Development Tool
Texas Instruments INA293EVM Evaluation Module
Small module with ten schematically identical boards that can be broken off by the user.
Published: 2020-01-21
| Updated: 2024-05-10