The INA241 utilizes a high-performance analog amplifier architecture optimized for speed and simplicity. The non-isolated design of the INA241 has one ground reference used for both the internal circuitry and output, simplifying PCB layout and reducing component count. The analog output interface provides immediate access to amplified current signals without requiring complex digital filtering or processing. The streamlined architecture of the device contributes to an impressive 1MHz bandwidth specification, making the INA241 an excellent choice for applications requiring low latency in the control loop. The analog interface allows for straightforward integration with existing analog-to-digital converters and control systems. However, in these motor control systems, analog devices like current sensing amplifiers typically employ blanking periods, which is an approximately 2us to 3us dead time where no measurement is taken so that artifacts and noise spikes during PWM switching are not counted. These blanking periods can cause missed readings and faulty data as PWM switching frequencies increase. To counter this, INA241 uses a switched-capacitor filter architecture to attenuate the switching noise. This filter dynamically adjusts the sampling rate based on the changes in PWM frequency, up to 125kHz or if each of the common mode transients are separated by a >3us interval.

Another benefit to the INA241 is a PWM rejection feature, and high CMRR. However, in these motor control systems, analog devices like current sense amplifiers see large common-mode ΔV/Δt transients. Large ΔV/Δt common-mode transients associated with PWM signals are employed in applications such as motor or solenoid drive and switching power supplies. The disturbances that can occur at the output of a current sense amplifier from common-mode transients causes erroneous measurements and impose limitations when the output is valid. The INA241x is designed with an enhanced PWM rejection feature, which is a high common-mode rejection technique that holds the device output for 1μs thereby preventing the common-mode disturbance from propagating to the output. If another common-mode transient occurs during the following 3μs, the INA241x relies on high BW and AC CMMR to attenuate the effect of common-mode transient. The enhanced PWM rejection is achieved up to a PWM frequency of 125kHz or if common-mode transient edges are separated by a 3μs interval or more. As a result, this makes system design simple with INA241x. The high AC CMRR, in conjunction with signal bandwidth, allows the INA241x to minimize output disturbances and ringing during common-mode transitions when compared against traditional current-sensing amplifiers.