INA310B Series
-4-V to 110-V 1.3-MHz high-precision current-sense amplifier with comparator
Manufacturer: Texas Instruments
Catalog
-4-V to 110-V 1.3-MHz high-precision current-sense amplifier with comparator
Key Features
• Wide common-mode voltage:Operational voltage: −4 V to +110 VSurvival voltage: −20 V to +120 VHigh signal bandwidth: 1.3 MHzSlew rate: 2.5 V/µsExcellent CMRR: 160 dBAccuracyGain error (maximum)Version A: 0.15%, 10 ppm/°C driftVersion B: 0.5%, 20 ppm/°C driftOffset voltage (maximum)Version A: ±20 µV, ±0.25 µV/°C driftVersion B: ±150 µV, ±1 µV/°C driftOn-board open-drain comparatorInternal comparator voltage reference: 0.6 VPropagation delay time: 1 µsLatching capability on comparatorAvailable gains:INA310A1, INA310B1 : 20 V/VINA310A2, INA310B2 : 50 V/VINA310A3, INA310B3 : 100 V/VINA310A4, INA310B4 : 200 V/VINA310A5, INA310B5 : 500 V/VPackage options: VSSOP-8Wide common-mode voltage:Operational voltage: −4 V to +110 VSurvival voltage: −20 V to +120 VHigh signal bandwidth: 1.3 MHzSlew rate: 2.5 V/µsExcellent CMRR: 160 dBAccuracyGain error (maximum)Version A: 0.15%, 10 ppm/°C driftVersion B: 0.5%, 20 ppm/°C driftOffset voltage (maximum)Version A: ±20 µV, ±0.25 µV/°C driftVersion B: ±150 µV, ±1 µV/°C driftOn-board open-drain comparatorInternal comparator voltage reference: 0.6 VPropagation delay time: 1 µsLatching capability on comparatorAvailable gains:INA310A1, INA310B1 : 20 V/VINA310A2, INA310B2 : 50 V/VINA310A3, INA310B3 : 100 V/VINA310A4, INA310B4 : 200 V/VINA310A5, INA310B5 : 500 V/VPackage options: VSSOP-8
Description
AI
The INA310x is an ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V, independent of supply voltage with an integrated comparator. The high precision current measurement accuracy is achieved through a combination of low offset voltage (20 µV, maximum), small gain error (0.15%, maximum) and a high DC CMRR (160 dB, typical). The INA310x has a high signal bandwidth of 1.3 MHz designed for high voltage DC current measurements and high-speed applications like fast overcurrent protection.
The INA310x incorporates an open-drain comparator and internal reference that provides a 0.6 V 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 operates from a single 2.7 V to 20 V supply and draws 1.6 mA of supply current. The INA310x is available in five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address a wide dynamic range of current-sensing applications.
The INA310x 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 is an ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V, independent of supply voltage with an integrated comparator. The high precision current measurement accuracy is achieved through a combination of low offset voltage (20 µV, maximum), small gain error (0.15%, maximum) and a high DC CMRR (160 dB, typical). The INA310x has a high signal bandwidth of 1.3 MHz designed for high voltage DC current measurements and high-speed applications like fast overcurrent protection.
The INA310x incorporates an open-drain comparator and internal reference that provides a 0.6 V 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 operates from a single 2.7 V to 20 V supply and draws 1.6 mA of supply current. The INA310x is available in five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address a wide dynamic range of current-sensing applications.
The INA310x is specified over an operating temperature range of −40°C to +125°C and is offered in a space-saving 8-pin VSSOP package.
