INA281/INA281-Q1 Current Sense Amplifier

Texas Instruments INA281/INA281-Q1 Current Sense Amplifier can measure voltage drops across shunt resistors over a wide common-mode range from –4V to 110V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. Combining a low offset voltage, small gain error, and high DC CMRR enables highly accurate current measurement. The Texas Instruments INA281/INA281-Q1 is not only designed for DC current measurement but also high-speed applications (like fast over current protection, for example) with a high bandwidth of 1.3MHz and a 65dB AC CMRR (at 50kHz).

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Description Datasheet Availability Pricing (GBP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Number of Channels
GBP - Gain Bandwidth Product
Vcm - Common Mode Voltage
CMRR - Common Mode Rejection Ratio
Ib - Input Bias Current
Vos - Input Offset Voltage
Supply Voltage - Max
Supply Voltage - Min
Operating Supply Current
Gain Error
Minimum Operating Temperature
Maximum Operating Temperature
Mounting Style
Package/Case
Qualification
Packaging
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVR
Datasheet
18,419In Stock
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Min.: 1
Mult.: 1
: 250

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 100 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
4,156In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
3,418In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
1,721In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 140 dB 20 uA 15 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVR
Datasheet
717In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 55 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
2,716In Stock
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Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 140 dB 20 uA 15 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
2,527In Stock
3,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1 MHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVT
Datasheet
2,831In Stock
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Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 120 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A5IDBVT
Datasheet
2,864In Stock
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Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 120 dB 20 uA 15 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVT
Datasheet
2,170In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 120 dB 20 uA 100 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
7,955In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 100 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B2IDBVT
Datasheet
4,065In Stock
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Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 120 dB 20 uA 55 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B3IDBVT
Datasheet
3,776In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1 MHz 48 V 120 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
6,253In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 100 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
3,869In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 55 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A3IDBVT
Datasheet
1,674In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1 MHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
5,378In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 140 dB 20 uA 55 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current
Datasheet
725In Stock
6,000Expected 17/08/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1 MHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-3-5 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVR
Datasheet
404In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

INA281 1 Channel 900 kHz 48 V 140 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.07 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A1IDBVT
Datasheet
831In Stock
3,000Expected 11/02/2027
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 120 dB 20 uA 100 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVT
Datasheet
9,635On Order
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 1.3 MHz 48 V 120 dB 20 uA 55 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B4IDBVT
Datasheet
Non-Stocked Lead-Time 9 Weeks
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 120 dB 20 uA 30 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel
Texas Instruments Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B5IDBVT
Datasheet
Non-Stocked Lead-Time 9 Weeks
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

INA281 1 Channel 900 kHz 48 V 120 dB 20 uA 15 uV 20 V 2.7 V 1.5 mA 0.5 % - 40 C + 125 C SMD/SMT SOT-23-5 Reel, Cut Tape, MouseReel