Nisshinbo – NL9620: High-Precision Measurement Amplifier

In industrial measurement devices, the use of specialized sensors is common due to the demand for more precise monitoring. In this context, a “measurement amplifier” that provides exceptional accuracy and reliability is essential, even when processing very small differential input signals. By combining proprietary process, trimming, and packaging technologies with circuit design technology, the amplifier achieves high-precision operation at the highest performance levels.

Designed to operate stably even in noisy and harsh measurement environments, the NL9620 achieves a common-mode rejection ratio (CMRR) of 110 dB or higher (with a typical value of 130 dB at G = 100) and excellent EMC performance. Its low input offset voltage (max 125 µV) and low offset voltage drift (max 1 µV/°C *2) also enable highly accurate measurements. The gain can be adjusted from 1x up to 10,000x using a single external resistor, simplifying design and improving customer product accuracy while reducing development effort.

Specifications: 

– Supply voltage: ±2.3V to ±18V 

– CMRR (G = 100): ≥110dB 

– Input offset voltage: 125µV @25°C; 185µV (full temperature) 

– Drift offset: 0.3µV/°C 

– Input bias current: 0.5nA 

– Supply current: 0.9mA @25°C 

– Bandwidth (-3dB): 1MHz @ G=1 

– Gain: From 1x to 10000x (with only 1 external resistor) 

Advantages: 

– Extremely high CMRR – Superior noise rejection 

– Extremely low input offset deviation 

– High accuracy and stability over a wide temperature range 

– Strong EMC resistance 

– Low power consumption 

Applications: 

– Precision sensor measuring devices: pressure sensors, temperature sensors (RTD, thermocouple), Shunt current sensors. 

– Medical devices: Electrocardiograph (ECG), EEG, EMG, Wearable or portable medical devices 

– Industrial and automation equipment: Motor control, Precision current measurement in power circuits, High/Low voltage system monitoring