■FEATURES

●Supply Voltage +2.4V to +3.6V

●Low Current Consumption 4μA (OPA, OPB),

150μA (ADC)

●Low Noise Amplifier 1.3μVpp typ. (0.1 to 10Hz)

●Low Offset Voltage Amplifier 300μV max.

●RF immunity Amplifier

●Programmable Cell Bias Voltage

OPA: 0.3V to 1.7V (7 steps)

OPB: 0.25V to 1.75V (50mV step)

●Programmable Gain Pre-Amplifier 1V/V to 8V/V

●High resolution Programmable Gain ADC

1V/V to 8V/V, 16-Bit (NFB), 32sps to 2k sps

●System Calibration for offset & gain drift

●Control external EEPROM as a Master device

●Ambient Operating Temperature -40°C to +85°C

●Interface I2C (3-Bit selectable slave address)

●Package EQFN-24-LE (4mm x 4mm)

■GENERAL DESCRIPTION

NJU9101 is a Low Power Analog Front End IC for use

in micro-power sensing applications,

especially electrochemical sensors. It provides a

complete signal processing solution between sensor

and micro-processor as smart-sensor module.

NJU9101 has 2 channel low power operational

amplifiers. These amplifiers provide potentiostat and

trans-impedance-amplifiers to constitute gas sensor

systems. The NJU9101 has calibration circuit by using

output data of built-in high precision ADC. It is suitable

for temperature variation of sensor.

NJU9101 operates over voltage range of 2.4V to 3.6V.

Total average current consumption can be less than

5μA.