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LA75525AVA датащи(PDF) 8 Page - Sanyo Semicon Device |
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LA75525AVA датащи(HTML) 8 Page - Sanyo Semicon Device |
8 / 10 page LA75525AVA No.A1256-8/10 Continued from preceding page. Pin No. Pin name Function Equivalent circuit 13 1st SIF INPUT First SIF input. ADC cut capacitor must be used in the input circuit. If a SAW filter is used: The first SIF sensitivity can be increased by inserting an inductor between the SAW filter and the IC to neutralize the SAW filter output capacitance and the IC input capacitance. When used in an intercarrier system: This pin (pin 13) maybe connect to GND. 13 100 Ω 30pF 2k Ω 2k Ω 100k Ω 12pF 20k Ω RF AGC OUTPUT RF AGC OUT PUT. This output controls the tuner RF AGC. A protective 200 Ω resister is inserted in series with the open collector out put. Determine the external bleeder resister value in accordance with the specifications of the tuner. 14 200 Ω 67 Ω 15 AFT MUTE LEVEL The MUTE voltage of AFT is set up this pin. It becomes a voltage that generated by an external bleeder resistor, when this pin is connected with GND. It becomes a High voltage (VCC) when this pin is leaving open. 15 1k Ω 1k Ω 50k Ω 80k Ω 30k Ω VCC 10k Ω 16 IF AGC INPUT IF AGC filter connection. The signal peak-detected by the built-in AGC detector is converted to the AGC voltage at pin 16. Additionally, a second AGC filter (a lag-lead filter) used to create the dual time constants is provided internally in the IC. Use a 0.022 µF capacitor as the external capacitor, and other characteristics. 16 VCC 1k Ω 1k Ω 17 18 VIF IN 2 VIF IN 1 VIF amplifier input. The input circuit is a balanced circuit, and the input constants are: R = 1.0k Ω C = 3pF 17 1k Ω 20k Ω 18 100 Ω 1k Ω 100 Ω 19 GND GND Continued on next page. |
Аналогичный номер детали - LA75525AVA |
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Аналогичное описание - LA75525AVA |
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