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BA8201F Datasheet(PDF) 6 Page - Rohm |
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BA8201F Datasheet(HTML) 6 Page - Rohm |
6 / 8 page 305 Communication ICs BA8201 / BA8201F FApplication example FAttached components C1: This is a capacitor for phase compensation, and is nor- mally connected at 68pF. C2: This is a coupling capacitor. The inductance from the telephone line changes based on this value. Normally, a value of 2.2 µF to 10µF is appropriate. C3: This is a capacitor for phase compensation, and is nor- mally connected at 47pF. C4: This is the capacitor for balancing the output. It sup- presses rippling in the output and also carries out de- coupling for the bias voltage supply of the IF pin. It should be adjusted based on the output current, load, and other factors. R1: Bias is applied from this pin to the IF pin. The inductance from the telephone line changes based on this value. Normally, a value of 100k Ω is appropriate. R2: This can be connected between Pins 6 and 7 to clamp the output voltage. The output voltage is expressed using the equation below. Vo (V) = 2 22 ( µA) R2 ( Ω) (reference value) ∗22µA is the reference internal current source for the IC. |
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