SIC4341

Potentiostat Sensor Interface

236-Byte NFC Type 2 Tag IC with built-in ADC and potentiostat sensor interface for electrochemical measurement

SIC4341 is a 236-byte NFC tag IC with potentiostat analog front-end and built-in ADC. The SIC4341 consists of an RF Analog-Front-End circuit supporting ISO14443A, a selectable 6-to-16-bit resolution sigma-delta ADC, an on-chip regulator, two 8-bit DACs, a potentiostat analog frontend circuit, a transimpedance amplifier, a voltage reference, a control register page and an EEPROM. SIC4341 is designed to perform voltametric techniques across 2/3-electrode chemical sensor and measure reaction current that generate by electrochemical cells.

Components

• 1.9V on chip regulator
• 1.28V internal voltage reference
• Transimpedance Amplifier
• Built-in ADC
  • Adjustable OSR 6-to-16-bit resolution
  • Conversion rate 0.1 sps upto 20 sps
• Two 8-bit DACs for WE/RE Biasing

Built-in Potentiostat AFE

• Sensor Electrode Channel
  • Selectable 2/3 electrode system
  • Configurable electrode channel
• Bias Potential Range: -0.8 V to + 0.8 V
  • VRE, VWE range 0.4 V to 1.2 V
  • Minimum step size 5 mV
• Current Range: Selectable
  • ± 2.5 µA full scale
  • ± 20 µA full scale
• Current Accuracy
  • ± 5 nA for ± 2.5 µA range
  • ± 20 nA for ± 20 µA range
• Data Streaming controlled from NFC mobile App or RFID reader software
  • Minimum time step 50 ms (depending on delay from mobile or reader)
• Compatible Electrochemical Techniques
  • Amperometry
  • Voltammetry

Connectivity

• RF interface based on ISO/IEC 14443A – 106 kbps
• NFC Forum tag type 2

Memory

• 236 bytes addressable EEPROM
• 48 bytes for calibration parameters (factory characterization information for software calibration for higher accuracy)
• 144 bytes user memory EEPROM
• EEPROM organization enabling NDEF format
• EEPROM zone for initializing register – automatically reload after powerup
• Up to 100,000 erase/write cycles
• Up to 10 years memory retention at 70˚C

Operating Conditions

• Operating temperature: 0℃ to 55℃
• Storage temperature: -40℃ to 85℃