SIC4343
Voltage Sensor Interface Chip
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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
ISO/IEC 14443 A, 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
- Built-In ADC
- Selectable Post Processing Average
 - 
Adjustable Conversion Starting Point to Avoid
 
 - 
Uplink to Ensure Power Stability
- 
Configurable Built-In Voltage Buffer for High-Impedance Sensor
 
 - 
 - 
Adjustable Sensor Biasing Frequency for Supporting Wide Capacitance-Range Sensor
 - Adjustable Sampling Point and Warm Up Clock
 - 
Support High Input impedance configuration
 
| Product Attributes | Description | |
|---|---|---|
| Specification | SIC4343 | |
| RFID Features | ||
| Working Principle | 
 Single-Ended Mode: Chip measures voltage  | 
 Differential Mode: Chip measures voltage  | 
| Communication Interface | NFC Forum Type 2 Tag ISO/IEC 14443 A  | 
|
| Power Management | RF On-chip regulator 1.9 V  | 
|
| Number of Channels | 3 I/O 2 channels – configurable Voltage source = 2 pins ADC input = 1 pin  | 
3 I/O 1 channel – configurable Voltage source = 1 pin ADC differential input = 2 pins  | 
| Voltage Source | ||
| Bias Wave Form | DC | |
| Bias Voltage Range | 0.2 V to 1.2 V | |
| Bias Voltage Accuracy | ± 6 mV | |
| Analog Input | ||
| Input Impedance | Input buffer is enabled: > 10 MΩ Input buffer is disabled: 18 – 42 kΩ  | 
|
| Measured Voltage Range | Input buffer is enabled: 0.2 V to 1.2 V Input buffer is disabled: 0 V to 1.2 V  | 
Input buffer is enabled: -1 V to +1 V Input buffer is disabled: -1.2 V to +1.2 V  | 
| Measured Accuracy | ± 2.5 mV | |
| Data Conversion Rate | 10 sps | |
| Memory | ||
| User Memory | 144 bytes | |
| Erase/Write Cycles | 100,000 times | |
| Data Retention | 10 years at 70°C | |
| Others | ||
| Compatible Analysis Techniques | Open Circuit Potential (OCP), Single-ended voltage measurement  | 
Differential voltage measurement (resistive divider, wheatstone bridge)  | 
| Available Form Factors | QFN 3×3 – 16 leads, Sawn wafer with bump  | 
|


						
			
		
						
			
		




				

				
				
				
				
				