Output voltage fluctuations in all frequency bands
Suppression to ±20mV or less... 1/10th that of other companies' products
High-speed signal amplification possible without external noise influence


With the increasing electrification and density of various applications, noise design for devices such as sensors that handle minute signals is emerging as a significant challenge. Furthermore, various safety-critical anomaly detection systems require operational amplifiers (OP Amps) capable of amplifying minute signals at high speeds.

However, high-speed OP Amp is difficult to handle because it is prone to oscillation due to load capacitance such as wiring, and there was the problem of a large load during board design. Accordingly, on the 24th, ROHM announced the 'BD77502FVM' 2-channel high-speed ground sense CMOS OP Amp that supports applications requiring high-speed sensing.

The BD77502FVM, which belongs to ROHM's EMARMOUR™ brand, which only has products with an output voltage fluctuation of ±300mV or less across the entire noise frequency band, is a 2-channel version of the BD77501G, a 1-channel ground sense CMOS op amp.

The output voltage fluctuation in all frequency bands is suppressed to less than ±20mV, which is 1/10 of that of other companies' products, so noise countermeasures are not required, and the noise design load can be reduced by reducing the total number of noise countermeasure components by 16.

The BD77502FVM op amp, based on ROHM's proprietary power stabilization control technology, Nano Cap™, supports high-speed amplification (high slew rate 10 V/µs) required in anomaly detection systems and other applications. Unlike typical high-speed op amps that can oscillate due to load capacitance such as wiring, this op amp does not oscillate.

Therefore, when installed at the rear end of a device that outputs a microscopic signal, such as a sensor, the signal can be amplified at high speed without being affected by external noise and load capacity. In addition, as it is a 2ch product, it contributes to miniaturization design, reduction of application design effort, and high reliability.

Sample shipments of the product began in August of this year at 500 yen per unit (excluding tax), and mass production is scheduled to begin in October with a monthly production capacity of 1 million units.