Texas Instruments INA253/INA253-Q1 Current-Shunt Monitor
Texas Instruments INA253/INA253-Q1 Current-Shunt Monitor is a voltage-output, current sense amplifier with an integrated shunt resistor of 2mΩ. The INA253/INA253-Q1 is designed to monitor bidirectional currents over a wide common-mode range from –4V to +80V, independent of the supply voltage. Three fixed gains are available: 100mV/A, 200mV/A, and 400mV/A. Integrating the precision resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy. This integration also offers ultra-low temperature drift performance of 15 ppm/°C and an optimized Kelvin layout for the sensing resistor.
The INA253/INA253-Q1 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in motor-drive and solenoid valve control applications. The Texas Instruments INA253-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Precision integrated shunt resistor
- Shunt resistor: 2mΩ
- Shunt inductance: 3nH
- Shunt resistor tolerance: 0.1% (max)
- ±15A continuous from –40°C to +85°C
- 0°C to 125°C temperature coefficient: 10 ppm/°C
- High bandwidth: 350kHz
- Enhanced PWM rejection
- Excellent CMRR
- > 120dB DC CMRR
- 90dB AC CMRR at 50kHz
- Accuracy
- Gain
- Gain error: 0.4% (max)
- Gain drift: 45ppm/°C (max)
- Offset
- Offset current: ±15mA (Max)
- Offset drift: 125µA/°C (Max)
- Gain
- Wide common-mode range: –4V to +80V
- Available gains: 100mV/A, 200mV/A, and 400mV/A
- Quiescent current: 2.4mA (max)
Applications
- Solenoid and valve controls
- Transmission control
- Motor controls
- Actuator controls
- DC/DC converters
- Remote I/O link control
Datasheets
Functional Block Diagram
Related Development Tool
Texas Instruments INA253EVM Current Sensing Evaluation Module
Demonstrates the effectiveness of the INA253x a voltage-output current-shunt monitor.
發佈日期: 2019-03-04
| 更新日期: 2023-07-25