SIC4343

Voltage Sensor AFE : Electrolytes Sensor Interface Chip

236-Byte NFC Type 2 Tag IC with build-in ADC for Voltage Measurement
SIC4343 is a 236-byte NFC tag IC with voltage sensor analog front-end . The SIC4343 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 voltage reference, a digital controller and an EEPROM. SIC4343 is designed to perform voltage biasing and voltage measurement across sensor.

Highlight Features

• Measurement mode
  • Single-ended
  • Differential
  • Open Circuit Potential (OCP)
• Channels: 3 I/O
• Biasing Voltage
  • 8-bit DACs: accuracy ± 6 mV
  • V-DC/ V ref: 0.2 V to 1.2 V
• Voltage Measurement Range
  • ADC accuracy ± 2.5 mV
  • Input buffer is enabled
    • Single: 0.2 V to 1.2 V
    • Differential: -1 V to +1 V
  • Input buffer is disabled
    • Single: 0 V to 1.2 V
    • Differential: -1.2 V to +1.2 V
• Input impedance
  • Buffer is enabled: > 10 MΩ
  • Buffer is disabled: 18-42 kΩ
• Data Conversion: Sampling rate 10 sps

Connectivity

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

Memory

• 236 bytes addressable EEPROM
• 48 bytes for calibration parameters
• 144 bytes user memory EEPROM
• EEPROM organization enabling NDEF format
• EEPROM for initializing register (Automatically reload after power up)
• Up to 100,000 times erase/write cycles
• Up to 10 years memory retention at 70°C

Operating Conditions

• Operating temperature 0 to 55°C
• Storage temperature -40 to 85°C