NFC forum type 2 tag IC with analog sensor interface – SIC4340

A new 228-byte ISO14443A passive sensor NFC tag with analog sensor for acquisition interface, to enable the sensors to seamlessly measure and forward data

Sensor Interface Peripheral

• Resistive/Capacitive sensor interface circuit
  • Resistance-to-Voltage measurement by dumping current source
  • Effective resistance range from 1kΩ to 300 kΩ
• Adjustable current source
  • 6-Bit Resolution
  • 2 Ranges
    ⇒ 0 – 504 μA @ 8μA/Step
    ⇒ 0 – 63 μA @ 1μA/Step
• Built-in ADC
  • 10-Bit effective resolution @ 1.28 volt full scale
  • Selectable post-processing averager
  • Configurable built-in voltage buffer for high-impedance sensor
  • Temperature compensate voltage reference
• Adjustable voltage limiter for preventing sensor burning or over voltage
  • 0 – 1.27 Volt
• Adjustable sensor biasing frequency for supporting wide capacitance-range sensor
  • 300 Hz – 50 kHz
• Adjustable sampling point for supporting various settling time
  • 1 – 49% referring to active period of sensor biasing pulse
• Adjustable warm up clock for pre-biasing sensor
  • 8 – 491528 clocks

RF Interfaces

• RF interface based on ISO14443A – 106 kbps
• NFC Forum tag type 2
• RF power qualifying scheme before operation

Memory

• 236 bytes addressable EEPROM
• 192 bytes user memory EEPROM
• EEPROM organization enabling NDEF format
• EEPROM erase/write cycle up to 100,000 times
• EEPROM memory retention up to 10 years at 70°C
• EEPROM zone for initializing register
  • Automatically reload after power-up

Operating Conditions

• Operating temperature from 0°C to 55°C
• On-chip regulator

Die Information

• Die size : 1200 um x 1200 um
• # Pad : 8 Pads
• Au pad size : 80 um x 80 um

Applications

• Chemical sensor NFC tag
• Tampered detection NFC tag
• Light/Humidity sensing NFC tag
• Closed Chamber Measurement