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. It is equipped with an I2C interface
The NJU9101 provides a complete signal processing solution between sensor and micro-processor as smart-sensor module. It 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 5 μA. In stand-by mode, the current consumption is 0.5 μA to ensure a long battery life. Precision, low noise operational amplifiers inside NJU9101 and the high precision delta-sigma 16bit A/D converter are designed to consume minimum power. This high resolution ADC has a programmable gain of 1V/V to 8V/V, 16-bit resolution and a sample rate of 32 sample/sec (sps) to 2 ksps. The built-in operational amplifiers are immune to high levels of RF noise from, for example, GSM, 3G, Bluetooth, or W-LAN. The operating temperature is between -40°C to +85°C. It comes in a small package, EQFN-24-LE (4mm x 4mm).
Suggested uses include gas monitors, blood glucose meters, current sensing systems, low power systems and photodiode sensing systems.