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TI INA281B2IDBVR product image
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TI INA281B2IDBVRRoHS

Manufacturer
TI
MPN
INA281B2IDBVR
LCSC Part #
C1517409
Packaging
SOT-23-5
Customer #
Key Attributes
Current-Sense Amplifier
Datasheetpdf iconTI INA281B2IDBVR
In-Stock: 368
368 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.5945$ 1.59
10+$ 1.407$ 14.07
30+$ 1.2733$ 38.20
100+$ 1.1527$ 115.27
500+$ 1.0972$ 548.60
1,000+$ 1.0744$ 1074.40
Standard Packaging3000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Linear/Amplifiers/Instrumentation, Op Amps, Buffer Amps
ManufacturerTI
PackagingSOT-23-5
Number of Channels1
Vos - Input Offset Voltage55uV
Vcm - Common Mode Voltage-4V~110V
Slew Rate2.5V/us
Input Offset Current(Ios)-
Bandwidth1.3MHz
FeaturesHigh-side detection;Low-side detection;Zero drift / auto-zero;Analog output interface
Operating Temperature-40℃~+125℃
Common Mode Rejection Ratio(CMRR)120dB
Ib - Input Bias Current20uA
Output Current-
Noise density(eN)50nV/√Hz
Input Offset Voltage Drift(Vos TC)0.1uV/℃
Quiescent Current1.5mA
Gain50V/V
Differential Voltage±12V
Dual Supply-
Single Supply2.7V~20V
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

The INA281 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 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 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281 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 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.

Features

AI Translation
  • Wide common-mode voltage: Operational voltage: -4 V to +110 V; Survival voltage: -20 V to +120 V
  • Excellent CMRR: 120-dB DC CMRR; 65-dB AC CMRR at 50 kHz
  • 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, INA281B1: 20 V/V; INA281A2, INA281B2: 50 V/V; INA281A3, INA281B3: 100 V/V; INA281A4, INA281B4: 200 V/V; INA281A5, INA281B5: 500 V/V
  • High bandwidth: 1.3 MHz
  • Slew rate: 2.5 V/μs
  • Quiescent current: 1.5 mA

Applications

AI Translation
  • Active antenna system mMIMO (AAS)
  • Macro remote radio unit (RRU)
  • 48-V rack server
  • 48-V merchant network & server power supply (PSU)
  • Solenoid control
  • Valve control
  • Telecom equipment
  • Power supplies