Distributor Rutronik presents the low power Analog Front End (AFE) NJU9101 from New Japan Radio (JRC). It is designed for portable measurement equipment and for use in micro-power sensing applications, especially electrochemical sensors.
Two measurement inputs, potentiostat and auxiliary, enable a broad range of measurement in portable devices. Using 3-Bit chip address function the AFE chip can detect up to seven different types of electrochemical gases by only one sensor.
The NJU9101 provides a complete signal processing solution between sensor and micro-processor as smart-sensor module. The AFE converts a sensor signal into the signal that an MCU or an external EEPROM can process. It also integrates a sensor diagnostic function. The NJU9101 operates over voltage ranges of 2.4V to 3.6V. Its total average current consumption can be less than 5μA. In stand-by mode, the current consumption is 0.5μA, so the power consumption is as low as possible in order to ensure a long battery life. Also the precision, low noise operational amplifiers inside NJU9101 and the high precision delta-sigma 16bit A/D converter are designed to consume less power. This high resolution ADC has a programmable gain of 1V/V to 8V/V, 16-Bit and a sample rate of 32sps to 2ksps. The built-in operational amplifiers are immune to RF noise from for example GSM, 3G, Bluetooth, W-LAN for transceiver (150MHz, 5W) which prevent the AFE from malfunction. The operating temperature is between -40°C to +85°C. It comes in the small package EQFN-24-LE (4mm x 4mm).
The NJU9101 is perfect for use in portable devices and applications like Gas Monitor, Blood Glucose Meter, Current Sensing Systems, Low Power Systems and Photodiode Sensing Systems.