INA281-Q1 Series

-4-V to 110-V, 1.3-MHz, high-precision current sense amplifier

Catalog

-4-V to 110-V, 1.3-MHz, high-precision current sense amplifier

Part	Slew Rate	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply Span (Min) [Min]	Current - Input Bias	Number of Circuits	Package / Case	Gain Bandwidth Product	Voltage - Input Offset	Amplifier Type	Mounting Type	Supplier Device Package	Voltage - Supply Span (Max) [Max]	Current - Supply	Qualification	Grade
Texas Instruments INA281A1IDBVT	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	100 çV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281A5IDBVR	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	900 kHz	15 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B5IDBVT	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	900 kHz	15 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B4QDBVRQ1	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	100 çV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA	AEC-Q100	Automotive
Texas Instruments INA281A2IDBVT	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	55 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B2IDBVR	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	55 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B5IDBVR	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	900 kHz	15 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B1IDBVT	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	100 çV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B2IDBVT	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	55 µV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA
Texas Instruments INA281B5QDBVRQ1	2.5 V/çs	-40 °C	125 °C	2.7 V	20 çA	1	SC-74A SOT-753	1.3 MHz	100 çV	Current Sense	Surface Mount	SOT-23-5	20 V	1.5 mA	AEC-Q100	Automotive

Catalog

-4-V to 110-V, 1.3-MHz, high-precision current sense amplifier

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40 °C to +125 °C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designWide common-mode voltage:Operational voltage: −4 V to +110 VSurvival voltage: −20 V to +120 VExcellent CMRR:120-dB DC CMRR65-dB AC CMRR at 50 kHzAccuracy:Gain:Gain error: ±0.5% (maximum)Gain drift: ±20 ppm/°C (maximum)Offset:Offset voltage: ±55 µV (typical)Offset drift: ±0.1 µV/°C (typical)Available gains:INA281A1-Q1, INA281B1-Q1 : 20 V/VINA281A2-Q1, INA281B2-Q1 : 50 V/VINA281A3-Q1, INA281B3-Q1 : 100 V/VINA281A4-Q1, INA281B4-Q1 : 200 V/VINA281A5-Q1, INA281B5-Q1 : 500 V/VHigh bandwidth: 1.3 MHzSlew rate: 2.5V/µsQuiescent current: 1.5 mAAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40 °C to +125 °C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designWide common-mode voltage:Operational voltage: −4 V to +110 VSurvival voltage: −20 V to +120 VExcellent CMRR:120-dB DC CMRR65-dB AC CMRR at 50 kHzAccuracy:Gain:Gain error: ±0.5% (maximum)Gain drift: ±20 ppm/°C (maximum)Offset:Offset voltage: ±55 µV (typical)Offset drift: ±0.1 µV/°C (typical)Available gains:INA281A1-Q1, INA281B1-Q1 : 20 V/VINA281A2-Q1, INA281B2-Q1 : 50 V/VINA281A3-Q1, INA281B3-Q1 : 100 V/VINA281A4-Q1, INA281B4-Q1 : 200 V/VINA281A5-Q1, INA281B5-Q1 : 500 V/VHigh bandwidth: 1.3 MHzSlew rate: 2.5V/µsQuiescent current: 1.5 mA

Description

The INA281-Q1 is a high-precision current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA281-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.3 MHz and an 65-dB AC CMRR (at 50 kHz). The INA281-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range for current-sensing applications. The INA281-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants. The INA281-Q1 is a high-precision current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA281-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.3 MHz and an 65-dB AC CMRR (at 50 kHz). The INA281-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range for current-sensing applications. The INA281-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.