Low Power Analog Front End

Data Sheet

New Product Introduction


  • Supply Voltage (+2.4 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

The 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.


  • Gas Monitor
  • Blood Glucose Meter
  • Current Sensing Systems
  • Low Power Systems
  • Photodiode Sensing Systems
  • Portable equipment

Package Information

Part NumberPackage OutlinePinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJU9101MLEEQFN24-LE20Sn2Bi31Yes--Non dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
NJU9101MLEEQFN24-LE(Active)Contact UsStock Check