NMS4110
Electrochemical Sensor Readout Integrated Circuit (ROIC)
Features
Level & time variant potential generation
Precise current measurement (~500pA)
2/3-terminal electrochemical Sensor
2-channel input (2 Working Electrode)
Chronoamperometry/Amperometric/Potentiometric
I2C/SPI interface
Sensor detection
Temperature sensor
Low power operation: periodic wakeup & shutdown
NVM for configuration storage
Working voltage: 2.5V ~ 3.3V
Block Diagram
Target Applications
Continuous Glucose Monitoring
Chronoamperometry for continuous 3-terminal (WE, RE, CE) glucose sensor
Chronoamperometry for continuous 2-terminal (WE, RE/CE) glucose sensor
Potentiostat for 2/3-terminal electrochemical sensor
Amperometric
Potentiometric
Biopotentiostat for 3-terminal electrochemical
Instrumental Amplifier
Applicable Sensor Configuration
Electrical Specification
TIA Gain: 1k ~ 500kΩ (internal), ~ 5MΩ (external)
CMRR of TIA: 210dB
DAC Resolution: 12bit or 6bit
DAC Range: ±800mV
DAC DNL: 0.496LSB (12bit) / 0.005LSB (6bit)
LPF Range: 47k ~ 4.7MHz (could be adjusted by external components)
DSM ADC: 16bit, ENoB=13bit
Temperature Sensor: 0.49°C