| Image | Part Number | Description / PDF | Quantity | Rfq |
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Anaren |
CHIP TERMINATOR |
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Signal terminators are specialized integrated circuits designed to match impedances and suppress signal reflections in high-speed transmission lines. They play a critical role in maintaining signal integrity by ensuring that voltage and current signals propagate without distortion. These devices are essential in modern electronics, particularly in applications requiring high-frequency data transmission, such as telecommunications, computing, and industrial automation.
| Type | Functional Characteristics | Application Examples |
|---|---|---|
| Resistive Terminators | Fixed or adjustable resistors to match transmission line impedance | DDR memory interfaces, RS-485 buses |
| Capacitive Terminators | Block DC signals while allowing AC signals to pass | High-speed ADC/DAC interfaces |
| Active Terminators | Dynamic impedance adjustment with voltage regulation | Fiber optic communication systems |
| Differential Terminators | Balanced termination for differential signaling | Ethernet (10GBASE-T), USB 3.0 |
Signal terminators typically consist of: - Precision resistors/capacitors embedded in silicon or ceramic substrates. - Package housing (e.g., SMT, TSSOP) with thermal dissipation features. - Internal ESD protection layers to prevent voltage spikes. - Multi-layer metallization for high-frequency signal routing.
| Parameter | Description |
|---|---|
| Termination Resistance ( ) | Matches transmission line impedance (e.g., 50 , 75 , 100 ). |
| Frequency Range (GHz) | Determines suitability for high-speed applications (e.g., 0.1-10 GHz). |
| Power Handling (W) | Maximum power dissipation without thermal degradation. |
| Capacitance (pF) | Affects signal rise/fall time in capacitive terminators. |
| Impedance Tolerance (%) | Accuracy of impedance matching (e.g., 2%, 5%). |
Case Study: In 10GBASE-T Ethernet, differential terminators ensure 100 impedance matching to reduce crosstalk and bit error rates.
| Manufacturer | Representative Product | Key Features |
|---|---|---|
| TI (Texas Instruments) | SN75LBC176 | RS-485 line driver with integrated termination |
| Analog Devices | ADN4661 | Low-power LVDS signal terminator |
| Infineon Technologies | TLE5012B | Automotive CAN FD controller with termination |
| STMicroelectronics | TS922 | Rail-to-rail op-amp for active termination circuits |
Key considerations:
1. Impedance match: Align with transmission line characteristics.
2. Frequency compatibility: Ensure specifications exceed system requirements.
3. Environmental factors: Temperature range, vibration resistance.
4. Package size: Prioritize SMT for high-density PCBs.
Case Study: For aerospace applications, select terminators with 2% impedance tolerance and -55 C to +125 C operating range.