Next-generation high-performance op-amps for automotive and industrial applications

NOVOSENSE Microelectronics has released its new NSOPA series of general-purpose op-amps. Engineered for automotive and industrial applications, these amplifiers can be employed for signal conditioning of voltage, current, temperature, and other signals, OBC/DC-DC/PDU, traction inverters, BMS, thermal management, BCM, industrial automation, photovoltaic inverters, motor drivers, digital power supplies and charging stations.

The inaugural product line, the NSOPA9xxx series, caters to high-voltage applications of up to 40V. Also, a low-voltage product series operating at 5.5V will soon debut. A diverse array of models is available within each series, providing bandwidth options of 1MHz, 5MHz, or 10MHz, with configurations of one, two, or four channels. Further, industrial and automotive-grade versions are provided for each model, ensuring comprehensive coverage of varying market requirements.

The automotive version of the series fulfils the reliability needs of AEC-Q100 Grade 1 and can operate in harsh environments from -40C to 125C. Different package versions are available to fulfil customer requirements: SOT23-5, SOIC-8 for one-channel; MSOP-8, SOP-8 for two-channel; and TSSOP-14, SOP-14 for four-channel.

The NSOPA9xxx series attains excellent performance with low offset and minimal drift. For instance, the NSOPA905x model offers an offset voltage of merely 200μV and a drift as low as 0.5μV/C. The series also has built-in EMI/RFI filters to strengthen the suppression of space radiation interference, providing good anti-interference and robustness of devices in practical applications.

When the power supply surpasses 4V, the typical DC PSRR exceeds 130dB, while the AC PSRR reaches 85dB at 1kHz and 65dB at 10kHz. These figures surpass the industry standard, setting a new benchmark for performance, enhancing performance stability and inhibition interference coupling to the acquisition loop through the power path.

The series provides customers input and output rail-to-rail performance, with an input common-mode range from V--0.1 to V++0.1. The DC common-mode rejection ratio (DC PSRR) is 110dB minimum and 120dB typical in the main input pair interval of a 40V power supply. The CMRR is also very effective in suppressing the common-mode variation at high frequencies.

The series excels in AC parameter performance, delivering versatile options tailored to various bandwidth requirements. Notably, the series includes three distinct versions – NSOPA901x, NSOPA905x, and NSOPA910x – each corresponding to bandwidths of 1MHz, 5MHz, and 10MHz, respectively, catering to diverse application needs. Equipped with a built-in slew boosting circuit designed for handling large signals, it offers an impressive slew rate of 12V/μs, adept at managing sudden pulse signals such as those encountered in overcurrent or overvoltage scenarios crucial for system safety. This high slew rate facilitates swifter triggering of protection thresholds, thereby affording crucial time for system protection mechanisms to engage. Moreover, in terms of noise performance, the series uses a low-noise process platform, delivering a minimal output noise of 6μV within the low-frequency range of 0.1Hz to 10Hz.

NSOPA905x adopts a unique design that provides minimal current (<1μA) flow, effectively mitigating