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LM1865 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LM1865 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 16 page Typical Application LAYOUT CONSIDERATIONS Although the pinout of the LM1865 has been chosen to min- imize layout problems some care is required to insure sta- bility The ground terminal on CF1 should return to both the input signal ground and the buffer ground pin 19 The ground terminal on CF2 should return to the ground side of C4 The quadrature coil T1 and inductor L1 should be sepa- rated from the input circuitry as far as possible PC Layout (Component Side) TLH7509 – 6 PERFORMANCE CHARACTERISTICS OF TYPICAL APPLICATION WITH TUNER The following data was taken using the typical application circuit in conjunction with an FM tuner with 43 dB of gain a 55 dB noise figure and 30 dB of AGC range The tuner was driven from a 50X source 75 ms of de-emphasis was used on the audio output pin 15 The 0 dB reference is for g75 kHz deviation at 400 Hz modulation Meter Output and Signal-to-Noise vs Tuner Input Total Harmonic Distortion vs Tuner Input AM Rejection vs Tuner Input TLH7509 – 7 b 3 dB limiting e 09 mV 30 dB quieting e 14 mV Level stopmute threshold e 14 mV Deviation mute window (b3 dB) e g45 kHz 6 |
Número de pieza similar - LM1865 |
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Descripción similar - LM1865 |
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