Active current-sense amp for precision shunt monitoring
The INA290A2IDCKT: The 1.1 MHz bandwidth and 2 V/µs slew rate mean this part tracks fast load transients — useful for monitoring current in a switching regulator's output or a motor phase where the current waveform changes faster than a slower amplifier can follow.
Supply flexibility and quiescent budget
Input bias current is 20 µA — high enough that the shunt resistor value matters for the measurement error budget. With a 10 mΩ shunt carrying 1 A, the shunt drop is 10 mV; the 20 µA bias flowing through the shunt adds a 0.2 µV offset error, negligible here, but with a 1 Ω shunt the same bias adds 20 µV — comparable to the input offset itself.
Housed in a 5-lead SC-70-5 (SOT-353), the part shares the same footprint as many other current-sense amplifiers from TI and other vendors — a pin-to-pin swap candidate if the BOM needs a second source.