INA281A2IDBVT
Active-4-V TO 110-V, 1.3-MHZ, HIGH-PRECISION CURRENT SENSE AMPLIFIER
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INA281A2IDBVT
Active-4-V TO 110-V, 1.3-MHZ, HIGH-PRECISION CURRENT SENSE AMPLIFIER
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Technical Specifications
Parameters and characteristics for this part
| Specification | INA281A2IDBVT |
|---|---|
| Amplifier Type | Current Sense |
| Current - Input Bias | 20 çA |
| Current - Supply | 1.5 mA |
| Gain Bandwidth Product | 1.3 MHz |
| Mounting Type | Surface Mount |
| Number of Circuits | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | SC-74A, SOT-753 |
| Slew Rate | 2.5 V/çs |
| Supplier Device Package | SOT-23-5 |
| Voltage - Input Offset | 55 µV |
| Voltage - Supply Span (Max) [Max] | 20 V |
| Voltage - Supply Span (Min) [Min] | 2.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.70 | |
| 10 | $ 2.42 | |||
| 25 | $ 2.29 | |||
| 100 | $ 1.99 | |||
| Digi-Reel® | 1 | $ 2.70 | ||
| 10 | $ 2.42 | |||
| 25 | $ 2.29 | |||
| 100 | $ 1.99 | |||
| Tape & Reel (TR) | 250 | $ 1.88 | ||
| 500 | $ 1.69 | |||
| 1250 | $ 1.43 | |||
| 2500 | $ 1.35 | |||
| 6250 | $ 1.30 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.26 | |
| 100 | $ 1.86 | |||
| 250 | $ 1.34 | |||
| 1000 | $ 1.01 | |||
Description
General part information
INA281-Q1 Series
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.
Documents
Technical documentation and resources
