A new choice for high-accuracy, highly compatible current sensing: NOVOSENSE launches the NSCSA21x-Q series high-precision current sense amplifiers

　　NOVOSENSE has launched the NSCSA21x-Q series high-precision current sense amplifiers, offering a –2V to 28V common-mode input range, ultra-low ±5μV offset voltage, 130dB CMRR, and 200kHz bandwidth. Designed to meet the needs of new energy vehicles, server power supplies, telecom power systems, and energy storage, the NSCSA21x-Q series delivers exceptional accuracy and system stability in demanding environments.

　　Addressing Key Challenges in Modern Power and Automotive Systems

　　As automotive electrification and industrial intelligence advance, current sensing accuracy and system stability have become critical to overall performance. Traditional current sensors often face limitations in low-voltage detection, reverse connection protection, and dynamic response, impacting system reliability and efficiency. The NSCSA21x-Q series directly targets these pain points, overcoming three major challenges in precision current detection:

　　(1) High-Precision Motor Phase Current Sampling

　　Supports bidirectional current sensing in H-bridge structures. Combined with FOC algorithms, it enables ±0.5° electrical angle control for precise motor performance.

　　(2) Suppression of Parasitic Inductance Interference

　　In low-side sensing, the NSCSA21x-Q effectively mitigates “ground bounce” effects through PWM rejection, maintaining high accuracy even with small current signals. With a 130dB CMRR and only ±5μV input offset, it ensures signal integrity under severe transient conditions.

　　(3) Reverse Battery Protection

　　Withstands up to –28V reverse voltage, safeguarding the system against battery misconnection and simplifying protection circuit design.

　　Robust Performance Across All Operating Conditions

　　Breaking conventional design limits, the NSCSA21x-Q series supports a wide –2V to 28V common-mode range with built-in PWM suppression and chip-level reverse-voltage tolerance. Even under –28V reverse common-mode stress, the device quickly resumes normal operation. In rigorous transient tests (–2V to 12V step change), it achieves a <5μs recovery time and <50mV output disturbance, making it ideal for high-accuracy current detection in motor drives and solenoid control under PWM switching environments.

　　Precision and Stability Across Temperature Extremes

　　Featuring a ±5μV (typical) input offset voltage and ±0.5% maximum gain error, the NSCSA21x-Q maintains outstanding accuracy over a full –40°C to 125°C temperature range. With a temperature drift as low as 0.05μV/°C, it ensures stable measurements in harsh automotive and industrial conditions.

Input Offset Voltage Distribution of NSCSA21x-Q Series

Common-Mode Rejection Ratio (CMRR) Distribution of NSCSA21x-Q Series

　　Fast Dynamic Response and Strong Transient Protection

　　With a 200kHz bandwidth (50V/V gain) and a 2V/μs slew rate, the NSCSA21x-Q supports fast current variation monitoring and real-time protection. Compared to mainstream alternatives, it achieves up to 3× faster transient response, meeting the needs of high-speed applications such as motor control and power protection.

　　Flexible Configurations with Automotive-Grade Reliability

　　The NSCSA21x-Q series offers four fixed gain options (50V/V, 75V/V, 100V/V, and 200V/V), covering both industrial and automotive versions. Packaged in an ultra-compact SC70-6 (2mm × 1.25mm) footprint, it's pin-compatible with industry standards, enabling smaller system size and higher design efficiency.

Four Fixed-Gain Versions of the NSCSA21x-Q Series

　　The NSCSA21x-Q series is AEC-Q100 Grade 1 qualified, supporting –40°C to +125°C operation and ensuring long-term reliability in automotive environments.