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Texas Instruments INA310x/INA310x-Q1 Current Sense Amplifier is an ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range. This range is from –4V to 110V, independent of supply voltage with an integrated comparator. The high precision current measurement accuracy is achieved through a combination of low offset voltage (20µV, max.), small gain error (0.15%, max.), and a high DC CMRR (160dB, typical). The INA310x/INA310x-Q1 has a high signal bandwidth of 1.3MHz designed for high voltage DC current measurements and high-speed applications like fast overcurrent protection.
The Texas Instruments INA310x/INA310x-Q1 incorporates an open-drain comparator and internal reference that provides a 0.6V threshold. An external resistive divider sets the current trip point. The comparator includes a latching capability that can be made transparent by grounding (or leaving open) the RESET pin. The INA310x/INA310x-Q1 operates from a single 2.7V to 20V supply and draws 1.6mA of supply current. The INA310x/INA310x-Q1 has five gain options: 20V/V, 50V/V, 100V/V, 200V/V, and 500V/V. These gain options address a wide dynamic range of current-sensing applications. The INA310x/INA310x-Q1 is specified over an operating temperature range of −40°C to +125°C and is offered in a space-saving 8-pin VSSOP package. The INA310x-Q1 devices are AEC-Q100 qualified for automotive applications.
