TI INA281B4IDBVR current sense amplifier, single circuit, SOT-23-5 package, 2.7 V to 20 V supply, 900 kHz gain bandwidth, 2.5 V/µs slew rate, -40°C to 125°C operating range.
| Parameter | Value |
|---|---|
| Mounting | Surface Mount |
| Amplifier type | Current Sense |
| Voltage - input offset | 30 µV |
| Voltage - supply span | 2.7 V |
| Current - supply | 1.5mA |
| Current - input bias | 20 µA |
| Operating temperature | -40°C ~ 125°C (TA) |
| Gain bandwidth product | 900 kHz |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Slew rate | 2.5V/µs |
| Case | SC-74A, SOT-753 |
| Number of circuits | 1 |
The 900 kHz gain-bandwidth product sets the usable bandwidth for closed-loop current sensing. For a typical motor phase current loop running at 20 kHz PWM, this amplifier has enough headroom to reproduce the waveform without significant phase lag. No QFN reflow needed — this is a friendly package for a weekend build or a production run.
The ROHS3 status covers the latest EU exemption updates, which simplifies compliance documentation for export builds.
It is a current sense amplifier — designed to measure current by amplifying the voltage across a shunt resistor.
The INA254A1IPWAR is a zero-drift current sense amplifier with a 350 kHz bandwidth and 2.4 V/µs slew rate, also in a surface-mount package. It trades bandwidth for lower offset drift, which may suit precision DC current measurement over the INA281's wider AC bandwidth.