Overview
The TMS3705DDRQ1 is a transponder base station IC developed by Texas Instruments for use in TI-RFid RF identification systems. This IC is designed to drive the antenna of the transponder system, send data modulated on the antenna signal, and detect and demodulate the response from the transponder. The transponder response is encoded as a frequency shift keyed (FSK) signal, with high and low bits represented by different high-frequency signals (134.2 kHz for low bits and 123 kHz for high bits, nominal). The device is particularly suited for automotive and other secure access applications due to its robust design and low power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC (D) | - |
| Number of Pins | 16 | - |
| Package Size | 9.9 mm × 3.91 mm | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 4.5 to 5.5 | V |
| Sleep Mode Supply Current | 0.2 | mA |
| Oscillator Frequency | Typically 4 MHz | - |
| Transponder Response Frequencies | 134.2 kHz (low bits), 123 kHz (high bits) | - |
Key Features
- Base station IC for TI-RFid™ RF identification systems
- Drives the antenna of the transponder system
- Sends modulated data to the antenna
- Detects and demodulates transponder response (FSK)
- Short-circuit protection
- Diagnosis capabilities
- Sleep mode supply current: 0.2 mA
- Designed for automotive requirements
- 16-pin SOIC (D) package
Applications
- Car Access and Immobilization
- Building Access Control
- Livestock Identification
Q & A
- What is the primary function of the TMS3705DDRQ1 IC?
The TMS3705DDRQ1 is used to drive the antenna of a TI-RFid transponder system, send modulated data, and detect and demodulate the transponder response.
- What type of signal does the transponder use for communication?
The transponder response is encoded as a frequency shift keyed (FSK) signal.
- What are the frequencies used for high and low bits in the FSK signal?
High bits are coded at 123 kHz and low bits at 134.2 kHz.
- What is the package type and pin count of the TMS3705DDRQ1?
The TMS3705DDRQ1 comes in a 16-pin SOIC (D) package.
- What is the operating temperature range of the TMS3705DDRQ1?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the TMS3705DDRQ1?
The supply voltage range is 4.5V to 5.5V.
- What is the sleep mode supply current of the TMS3705DDRQ1?
The sleep mode supply current is 0.2 mA.
- What are some common applications of the TMS3705DDRQ1?
Common applications include car access and immobilization, building access control, and livestock identification.
- How does the TMS3705DDRQ1 handle short-circuit protection?
The device includes built-in short-circuit protection to ensure safe operation.
- Can the TMS3705DDRQ1 be used in automotive applications?
Yes, the TMS3705DDRQ1 is designed to meet automotive requirements.
