TLP2631(TP1,F)
Toshiba
The Toshiba TLP2631 is a dual photocoupler functioning as an isolated line receiver. It features high speed switching and robust isolation.
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2 pcs
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2 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The ITT Cannon TBA120 Series ICs are designed as FM Demodulator ICs, integrating a high-gain limiting IF amplifier and a quadrature coincidence detector into a single package. These components are particularly suited for the extraction of TV intercarrier sound, especially in European systems where sound is frequency modulated onto a 5.5MHz or 6MHz subcarrier.
The TBA120 offers superior performance compared to older Foster-Seeley and Ratio Detector systems, with a significantly reduced component count. The input to the IF amplifier is at pin 14, with DC bias at pin 13. Input filtering can be achieved using a resistor (R in) between 330 Ω and 2.2 kΩ, or a ceramic filter. The FM demodulator requires an LC resonator and feedback capacitors (C x), with 50pF recommended for 5.5 or 6MHz systems. For NBFM, 1nF is suitable for 455KHz and 100KHz.
The output at pin 8 exhibits an S-curve characteristic. The IF amplifier limits at approximately 30mV input, making the system immune to amplitude fluctuations. The DC component, nominal at 7V for Vcc=12V, can be used for tuning meters, though temperature compensation is advised. For TV systems, a de-emphasis capacitor of 22nF is typically used across the 2.6kΩ output load for a 50µS time constant. The TBA120S variant includes additional features like a Zener diode and an audio amplifier.
| Qty | Low | High |
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| 1+ | $1.94 | $1.94 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The TBA120 Series ICs are primarily intended for extraction of TV intercarrier sound.
The TBA120 Series ICs provide a high-gain limiting IF amplifier and a quadrature coincidence detector.
Typical values for R in lie between 330 Ω and 2.2 kΩ.
For 5.5 or 6MHz FM systems, the recommended value for the feedback capacitor (C x) is 50pF.
For a TV system, the practical value for the de-emphasis capacitor is 22nF.
The limiting of the IF amplifier occurs with about 30 mV input.
