The **SFTLF10M7CBA0-R0** is a ceramic filter manufactured by **Murata Electronics**. It is part of the **CERAFIL®** series, specifically designed for FM intermediate frequency (IF) stages in radio receivers. --- ## 1. Technical Specifications The following table highlights the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Center Frequency (fo)** | 10.700 MHz | | **3dB Bandwidth** | 190 kHz ± 50 kHz | | **Insertion Loss** | 5.5 dB max. (at fo) | | **Input/Output Impedance** | 330 $\Omega$ | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | Surface Mount (SMD) | --- ## 2. Key Features and Construction This component utilizes the piezoelectric effect of ceramics to filter specific frequencies. * **Chip Type (SMD):** Unlike traditional leaded ceramic filters, this is an SMD component, making it suitable for automated high-density PCB assembly. * **Selectivity:** It offers high selectivity to ensure clear signal separation between FM stations. * **Stability:** Murata uses proprietary ceramic materials that provide excellent frequency stability against temperature fluctuations and aging. --- ## 3. Application Circuit Context In a typical FM receiver circuit, this filter is placed between the mixer and the FM IF amplifier/detector. ```mermaid graph LR A[Antenna] --> B[RF Amp] B --> C[Mixer] C --> D[SFTLF10M7CBA0-R0] D --> E[FM IF Amp] E --> F[Demodulator] ``` ### Why 10.7 MHz? The **10.7 MHz** frequency is the worldwide standard intermediate frequency for FM broadcasting. This filter ensures that only the desired station's signal (converted to 10.7 MHz) passes through to the demodulator while suppressing noise and adjacent channel interference. --- ## 4. Part Number Breakdown * **SFTLF**: Series name (Surface Mount Ceramic Filter for FM). * **10M7**: Nominal Center Frequency (10.7 MHz). * **CBA0**: Specific internal characteristics (Bandwidth and Loss profile). * **R0**: Packaging code (usually refers to Tape and Reel).