INA310A3IDGKR

The INA310x is an ultra-precision current-sense amplifier that measures the voltage drop across a shunt resistor over a wide common-mode range of -4 V to 110 V, independent of the supply voltage, with an integrated comparator. High-accuracy current measurement is achieved through a combination of low offset voltage (20 μV maximum), small gain error (0.15% maximum), and high DC common-mode rejection ratio (160 dB typical). The INA310x features a 1.3 MHz signal bandwidth and is designed for high-voltage DC current measurement and high-speed applications such as fast overcurrent protection. The INA310x integrates an open-drain comparator with an internal reference providing a 0.6 V threshold. An external resistive voltage divider sets the current trip point. The comparator includes a latch function that can be made transparent by pulling the RESET pin low (or leaving it floating). The INA310x operates from a single 2.7 V to 20 V supply and draws 1.6 mA of supply current. Five gain options are available: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V, suited for current-sensing applications requiring a wide dynamic range. The INA310x operates over a temperature range of -40°C to +125°C and is offered in a space-saving 8-pin VSSOP package.

Applications

• 48 V DC/DC converters
• 48 V battery management systems (BMS)
• Test and measurement
• Macro remote radio units (RRU)
• 48 V rack servers
• 48 V commercial network and server power supplies (PSU)
• Solenoids and actuators

Key features

• Wide common-mode voltage range:
• Operating voltage: -4 V to +110 V
• Survival voltage: -20 V to +120 V
• High signal bandwidth: 1.3 MHz
• Slew rate: 2.5 V/µs
• Excellent CMRR: 160 dB
• Accuracy:
• Gain error (maximum):
• Grade A: 0.15%, temperature drift 10 ppm/°C
• Grade B: 0.5%, temperature drift 20 ppm/°C
• Offset voltage (maximum):
• Grade A: ±20 μV, temperature drift ±0.25 μV/°C
• Grade B: ±150 μV, temperature drift ±1 μV/°C
• On-board open-drain comparator
• Internal comparator voltage reference: 0.6 V
• Propagation delay time: 1 µs
• Comparator with latch function
• Available gains:
• INA310A1, INA310B1: 20 V/V
• INA310A2, INA310B2: 50 V/V
• INA310A3, INA310B3: 100 V/V
• INA310A4, INA310B4: 200 V/V
• INA310A5, INA310B5: 500 V/V
• Package option: VSSOP-8