■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.