Packaging information
| Package | Pins HTSSOP (PWA) | 24 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the INA254
- Precision integrated 400-µΩ shunt resistor
- Continuous ±75 A at 25°C
- Continuous ±50 A from –40°C to +85°C
- Shunt resistor tolerance: 0.5% (maximum)
- Low drift: 10 ppm/°C (0°C to 125°C)
- Low inductance: 2 nH
- High accuracy
- System gain error: 0.5% (maximum)
- System gain drift: 45 ppm/°C (maximum)
- Input offset current: ±62.5 mA (maximum)
- Input offset drift: 625 µA/°C (maximum)
- DC CMRR > 120-dB
- 90-dB AC CMRR at 50 kHz
- Enhanced PWM rejection
- Wide common-mode range: –4 V to +80 V
- Available gains: 20 mV/A, 40 mV/A, and 75 mV/A
Description for the INA254
The INA254 is a voltage-output, current sense amplifier with a 400-µΩ integrated shunt resistor. The INA254 is designed to monitor bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 20 mV/A, 40 mV/A, and 75 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±45 ppm/°C (maximum), and an optimized Kelvin layout for the sensing resistor.
The INA254 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 a motor-drive application, and for solenoid valve control applications.
This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 2.4 mA of supply current. All gain versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 24-pin HTSSOP package.