Low-noise CMOS op amps from Rohm

July 09, 2018 // By Peter Clarke
Rohm Semiconductor has announced the availability of a CMOS op amp that, it claims, has the lowest noise in examples optimized for industrial applications that require high-accuracy sensing such as accelerometers in sonar systems and for use with optical sensors.

The LMR1802G-LB has an input voltage range of 2.5 to 5.5V, an input offset voltage of just 450microvolts and input bias current of only 0.5pA – 4x and 2x less than conventional products, respectively – providing high accuracy amplification.

Rohm's analog design reduces input equivalent noise voltage density by half (2.9nV/√Hz at 1kHz, 7.8nV/√Hz at 10Hz) compared to conventional products, improving the detection performance of sensor signals. In addition, the phase margin of 68° and capacitive load tolerance of 500pF provide excellent stability and enable accurate amplification of voltages of the microvolt order, ensuring support for industrial and consumer applications requiring high-precision sensing.

The op amp is housed in an SSOP5 package measuring 2.9mm by 2.8mm by 1.25mm and is specified over the full industrial temperature range.

Pricing is to be determined and the part is available in sample quantities with production quantities due in October 2018.

Related links and articles:

www.rohm.com

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