Current Sense Amplifiers – Mouser Singapore

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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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Part #

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVR

INA281B1IDBVT
Texas Instruments
1: $4.04
18,396In Stock

Mfr. Part No.
INA281B1IDBVT

Mouser Part No
595-INA281B1IDBVT

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVR

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Datasheet

18,396In Stock

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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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281B4QDBVRQ1
Texas Instruments
1: $4.37
4,116In Stock

Mfr. Part No.
INA281B4QDBVRQ1

Mouser Part No
595-INA281B4QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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4,116In Stock

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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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281B1QDBVRQ1
Texas Instruments
1: $4.37
8,144In Stock

Mfr. Part No.
INA281B1QDBVRQ1

Mouser Part No
595-INA281B1QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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8,144In Stock

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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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281A3QDBVRQ1
Texas Instruments
1: $4.37
5,166In Stock

Mfr. Part No.
INA281A3QDBVRQ1

Mouser Part No
595-INA281A3QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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5,166In Stock

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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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281A4QDBVRQ1
Texas Instruments
1: $4.37
3,178In Stock

Mfr. Part No.
INA281A4QDBVRQ1

Mouser Part No
595-INA281A4QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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Datasheet

3,178In Stock

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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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281A5QDBVRQ1
Texas Instruments
1: $4.37
1,704In Stock

Mfr. Part No.
INA281A5QDBVRQ1

Mouser Part No
595-INA281A5QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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Datasheet

1,704In Stock

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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

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Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVR

INA281A2IDBVT
Texas Instruments
1: $4.09
559In Stock

Mfr. Part No.
INA281A2IDBVT

Mouser Part No
595-INA281A2IDBVT

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVR

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Datasheet

559In Stock

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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

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281B5QDBVRQ1
Texas Instruments
1: $4.37
2,691In Stock

Mfr. Part No.
INA281B5QDBVRQ1

Mouser Part No
595-INA281B5QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

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Datasheet

2,691In Stock

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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

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Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVT

INA281A4IDBVR
Texas Instruments
1: $3.03
2,813In Stock

Mfr. Part No.
INA281A4IDBVR

Mouser Part No
595-INA281A4IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVT

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Datasheet

2,813In Stock

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$2.04

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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

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Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A5IDBVT

INA281A5IDBVR
Texas Instruments
1: $3.09
2,739In Stock

Mfr. Part No.
INA281A5IDBVR

Mouser Part No
595-INA281A5IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A5IDBVT

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Datasheet

2,739In Stock

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$3.09

$2.28

$2.08

$1.86

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVT

INA281B1IDBVR
Texas Instruments
1: $3.39
2,127In Stock

Mfr. Part No.
INA281B1IDBVR

Mouser Part No
595-INA281B1IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B1IDBVT

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Datasheet

2,127In Stock

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$2.30

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B2IDBVT

INA281B2IDBVR
Texas Instruments
1: $2.99
3,030In Stock

Mfr. Part No.
INA281B2IDBVR

Mouser Part No
595-INA281B2IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B2IDBVT

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Datasheet

3,030In Stock

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$2.03

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B3IDBVT

INA281B3IDBVR
Texas Instruments
1: $2.99
2,255In Stock

Mfr. Part No.
INA281B3IDBVR

Mouser Part No
595-INA281B3IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B3IDBVT

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Datasheet

2,255In Stock

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$2.99

$2.22

$2.03

$1.81

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$1.51

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: 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

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281A1QDBVRQ1
Texas Instruments
1: $4.37
6,253In Stock

Mfr. Part No.
INA281A1QDBVRQ1

Mouser Part No
595-INA281A1QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

Learn More

Datasheet

6,253In Stock

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$4.37

$3.28

$3.01

$2.71

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$2.30

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: 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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281A2QDBVRQ1
Texas Instruments
1: $4.37
4,411In Stock

Mfr. Part No.
INA281A2QDBVRQ1

Mouser Part No
595-INA281A2QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

Learn More

Datasheet

4,411In Stock

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$4.37

$3.28

$3.01

$2.71

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$2.37

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A3IDBVT

INA281A3IDBVR
Texas Instruments
1: $3.48
1,421In Stock

Mfr. Part No.
INA281A3IDBVR

Mouser Part No
595-INA281A3IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A3IDBVT

Learn More

Datasheet

1,421In Stock

Cut Tape

$3.48

$2.58

$2.37

$2.12

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$1.81

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: 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

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281B2QDBVRQ1
Texas Instruments
1: $4.37
5,247In Stock

Mfr. Part No.
INA281B2QDBVRQ1

Mouser Part No
595-INA281B2QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

Learn More

Datasheet

5,247In Stock

Cut Tape

$4.37

$3.28

$3.01

$2.71

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$2.30

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: 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

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Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

INA281B3QDBVRQ1
Texas Instruments
1: $4.54
7,029In Stock

Mfr. Part No.
INA281B3QDBVRQ1

Mouser Part No
595-INA281B3QDBVRQ1

Texas Instruments

Current Sense Amplifiers AEC-Q100 -4-V to 11 0-V 1.3-MHz current

Learn More

Datasheet

7,029In Stock

Cut Tape

$4.54

$3.39

$3.10

$2.79

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$2.37

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: 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

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Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVT

INA281A2IDBVR
Texas Instruments
1: $2.99
127In Stock
6,000Expected 19/11/2026

Mfr. Part No.
INA281A2IDBVR

Mouser Part No
595-INA281A2IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A2IDBVT

Learn More

Datasheet

127In Stock

6,000Expected 19/11/2026

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$2.99

$2.22

$2.03

$1.81

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$1.51

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: 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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVR

INA281A4IDBVT
Texas Instruments
1: $4.04
404In Stock

Mfr. Part No.
INA281A4IDBVT

Mouser Part No
595-INA281A4IDBVT

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A4IDBVR

Learn More

Datasheet

404In Stock

Cut Tape

$4.04

$3.03

$2.77

$2.62

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$2.34

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A1IDBVT

INA281A1IDBVR
Texas Instruments
1: $3.39
211In Stock
6,000On Order

Mfr. Part No.
INA281A1IDBVR

Mouser Part No
595-INA281A1IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281A1IDBVT

Learn More

Datasheet

211In Stock

6,000On Order

Cut Tape

$3.39

$2.52

$2.30

$2.07

Reel

$1.73

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: 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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B4IDBVT

INA281B4IDBVR
Texas Instruments
1: $3.17
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
INA281B4IDBVR

Mouser Part No
595-INA281B4IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B4IDBVT

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

Cut Tape

$3.17

$2.35

$2.14

$1.92

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$1.62

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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

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B5IDBVT

INA281B5IDBVR
Texas Instruments
1: $3.17
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
INA281B5IDBVR

Mouser Part No
595-INA281B5IDBVR

Texas Instruments

Current Sense Amplifiers -4-V to 110-V 1.3-M Hz high-precision c A 595-INA281B5IDBVT

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

Cut Tape

$3.17

$2.35

$2.14

$1.92

Reel

$1.51

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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

INA281/INA281-Q1 Current Sense Amplifier

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