Packaging information
| Package | Pins VSON (DEK) | 15 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 4,000 | LARGE T&R |
Features for the INA790B
- Precision design with integrated shunt resistor
- ±75A continuous current at 25°C
- ±50A continuous current at +125°C
- Shunt resistor: 400µΩ
- Shunt inductance: 2nH
- Wide common-mode voltage range: –4V to +110V
- Enhanced PWM rejection
optimized for systems subject to switching common-mode voltages
- Supports switching frequencies up to 125kHz
- Excellent CMRR
- 160dB DC CMRR
- 114dB AC CMRR at 50kHz
- High measurement accuracy
- System Gain error (maximum)
- Version A: ±0.35%, ±35ppm/°C drift
- Version B: ±1%, ±100ppm/°C drift
- Offset current (maximum)
- Version A: ±40mA, ±70mA over temperature
- Version B: ±210mA, ±250mA over temperature
- System Gain error (maximum)
- Adjustable gain with external resistor divider network: 20mV/A to 400mV/A
- Open-drain temperature alert at TJ of 160°C
Description for the INA790B
The INA790x is a voltage output, current sense amplifier with an integrated shunt resistor of 400µΩ. The INA790x is designed to monitor bidirectional current over a common-mode range of –4V to 110V, independent of the supply voltage. Adjustable gain option assists in optimizing the system dynamic range. The integration of the Kelvin connected shunt resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±35ppm/°C, and an optimized layout for the sensing resistor.
The INA790x is designed with enhanced PWM rejection circuitry to suppress disturbance from large (dv/dt) common-mode transients and enable real-time continuous current measurements in switching systems. The continuous measurements are critical for inline current measurements in a motor-drive application, and for solenoid valve control application.
This device operates from a single 2.7V to 5.5V power supply, drawing a maximum of 4.25mA of supply current. All versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 15-pin VQFN package.