New Product Launch | MSA2240: -20V to 80V, 500kHz, Bidirectional, Ultra-Precision Current Sense Amplifier

Modern industry and precision instruments demand increasingly stringent requirements for current measurement, especially in motor control, power management, and data acquisition systems, where absolute reliability must be maintained amid high-noise environments and wide voltage fluctuations.

The newly launched MSA2240 bidirectional, ultra-precision current sense amplifier from RuiMeng Technology, featuring a wide common-mode voltage range of -20V to 80V and enhanced PWM rejection, offers an ideal solution for current sensing in complex operating conditions.

Core Advantages

01 Enhanced PWM Rejection

Designed for high-frequency switching noise environments such as motor drives, this feature effectively suppresses fast common-mode transients, ensuring stable and glitch-free output voltage signals under strong PWM interference, thereby enabling accurate restoration of true current.

Typical Performance Curve

02 High-Precision Current Sensing

With an extremely low offset voltage of ±3μV and a low temperature drift of ±100nV/°C, the device establishes an exceptionally stable reference point across the entire operating temperature range, significantly improving small-current measurement resolution and overall system accuracy.

03 Low Gain Error

A gain error of ±0.03% and a gain temperature drift of ±3.5ppm/°C ensure excellent accuracy and long-term consistency in current measurement, from full scale to small signals, across varying temperatures.

04 High Common-Mode Rejection Ratio (CMRR)

A DC CMRR of 160dB and an AC CMRR of 107dB at 50kHz greatly attenuate the effects of common-mode voltage fluctuations, ensuring clean and reliable differential current signal output even during drastic power supply voltage changes.

Technical Specifications

(Note: Refer to the datasheet for specific details.)

Application Scenarios

With its low power consumption and high integration, the MSA2240 excels in the following fields:

Industrial Automation and Motor Drives: Leveraging its -20V negative voltage tolerance and enhanced PWM rejection, it reliably monitors currents in servo motors and inverters under complex conditions such as stall and braking, ensuring precise and stable control.

Precision Sensor Signal Conditioning: Its high precision and low offset characteristics enable accurate amplification of weak current signals from bridge sensors like pressure and force sensors, enhancing the signal-to-noise ratio and accuracy of the entire measurement chain.

Data Acquisition Systems and Test Equipment: With a wide measurement range of -20V to 80V and a 500kHz bandwidth, it is suitable for high-end data acquisition cards and oscilloscopes, meeting the requirements for recording and analyzing wide dynamic range currents in power supply and power device testing.

RuiMeng Technology’s MSA2240, with its ±3μV precision and -20V wide-voltage capability, tackles complex operating conditions head-on. With its 160dB ultra-high common-mode rejection, it locks onto clean signals amid noise. It not only redefines the boundaries of current sensing accuracy but also provides a robust sensing core for highly reliable industrial automation and precision measurement systems.