Overview
The TMS3705, produced by Texas Instruments, is a base station IC designed for RF identification systems, particularly within the TI-RFid™ family. This IC is crucial for driving the antenna, sending modulated data, and detecting and demodulating the response from transponders using Frequency Shift Keying (FSK). It is widely used in automotive applications such as car access and immobilization, as well as in other fields like building access and livestock tracking.
Key Specifications
| Characteristic | TMS3705 |
|---|---|
| Data Rate (Maximum) | 8 kbps |
| Frequency | 134.2 kHz |
| Required Antenna Inductance | 100 to 1000 µH |
| Supply Voltage | 4.5 to 5.5 Vdc |
| Transmission Principle | HDX, FSK |
| Package | 16-pin SOIC (D) |
| Body Size | 9.9 mm × 3.91 mm |
| Sleep Mode Supply Current | 0.2 mA |
Key Features
- Base station IC for TI-RFid™ RF identification systems
- Drives antenna and sends modulated data
- Detects and demodulates transponder response (FSK)
- Short-circuit protection and diagnosis capabilities
- Designed for automotive requirements
- Interface to an external microcontroller
- On-chip PLL generating a 16 MHz clock frequency for internal use
- Supports various transponder products with specific configurations
Applications
- Car Access and Immobilization
- Building Access
- Livestock Reader
Q & A
- What is the primary function of the TMS3705 IC?
The TMS3705 is a base station IC for RF identification systems, responsible for driving the antenna, sending modulated data, and detecting and demodulating the response from transponders. - What is the maximum data rate supported by the TMS3705?
The maximum data rate supported is 8 kbps. - What is the operating frequency of the TMS3705?
The operating frequency is 134.2 kHz. - What type of transmission principle does the TMS3705 use?
The TMS3705 uses HDX and FSK transmission principles. - What is the supply voltage range for the TMS3705?
The supply voltage range is 4.5 to 5.5 Vdc. - What is the package type and size of the TMS3705?
The package type is 16-pin SOIC (D), and the body size is approximately 9.9 mm × 3.91 mm. - What is the sleep mode supply current of the TMS3705?
The sleep mode supply current is 0.2 mA. - How does the TMS3705 interface with an external microcontroller?
The TMS3705 interfaces with an external microcontroller through various pins, including TXCT and SCIO, and can be configured to use a shared or separate clock supply. - What types of transponder products is the TMS3705 compatible with?
The TMS3705 is compatible with various transponder products, including those from the DST40, DST80, MPT series, and AES transponder products, depending on the specific TMS3705 variant. - What are some key applications of the TMS3705?
Key applications include car access and immobilization, building access, and livestock tracking.
